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1394 lines
43 KiB
XML
1394 lines
43 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.112 $ -->
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<chapter id="configuration">
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<title>Runtime Configuration</title>
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<sect1 id="configuration.file">
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<title>The configuration file</title>
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<simpara>
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The configuration file (called <filename>php3.ini</filename> in
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PHP 3.0, and simply &php.ini; as of PHP 4.0)
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is read when PHP starts up. For the server module versions of PHP,
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this happens only once when the web server is started. For the
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<acronym>CGI</acronym> and <acronym>CLI</acronym> version, it happens on
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every invocation.
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</simpara>
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<para>
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The default location of &php.ini; is a compile time option (see the <link
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linkend="faq.installation.phpini">FAQ</link> entry), but can be changed
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for the <acronym>CGI</acronym> and <acronym>CLI</acronym> version with the
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<literal>-c</literal> command line switch, see the chapter about using
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<literal>PHP</literal> from the <link
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linkend="features.commandline">command line</link>. You can also use the
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environment variable <literal>PHPRC</literal> for an additional path to
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search for a &php.ini; file.
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</para>
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<note>
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<para>
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The Apache web server changes the directory to root at startup causing
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PHP to attempt to read &php.ini; from the root
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filesystem if it exists.
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</para>
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</note>
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<para>
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Not every PHP directive is documented below. For a list of all directives,
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please read your well commented &php.ini; file. You may want to view the
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latest <ulink url="&url.php.cvs.phpini;">php.ini here</ulink> from CVS.
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</para>
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<note>
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<para>
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The default value for the PHP directive
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<link linkend="ini.register-globals">register_globals</link> changed from
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<emphasis>on</emphasis> to <emphasis>off</emphasis> in PHP
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<ulink url="&url.php.release4.2.0;">4.2.0</ulink>.
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</para>
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</note>
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<para>
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<example>
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<title>&php.ini; example</title>
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<programlisting role="ini">
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<![CDATA[
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; any text on a line after an unquoted semicolon (;) is ignored
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[php] ; section markers (text within square brackets) are also ignored
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; Boolean values can be set to either:
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; true, on, yes
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; or false, off, no, none
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register_globals = off
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magic_quotes_gpc = yes
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; you can enclose strings in double-quotes
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include_path = ".:/usr/local/lib/php"
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; backslashes are treated the same as any other character
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include_path = ".;c:\php\lib"
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]]>
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</programlisting>
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<!-- TODO: add more details about values and expressions -->
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</example>
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</para>
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</sect1>
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<sect1 id="configuration.changes">
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<title>How to change configuration settings</title>
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<sect2 id="configuration.changes.apache">
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<title>Running <literal>PHP</literal> as Apache module</title>
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<simpara>
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When using PHP as an Apache module, you can also change the
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configuration settings using directives in Apache configuration
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files (e.g. &httpd.conf;) and
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&htaccess; files (You will need
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"AllowOverride Options" or "AllowOverride All" privileges)
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</simpara>
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<para>
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With PHP 4.0, there are several Apache directives that allow you
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to change the PHP configuration from within the Apache configuration
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files. For a listing of which directives are
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<constant>PHP_INI_ALL</constant>, <constant>PHP_INI_PERDIR</constant>,
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or <constant>PHP_INI_SYSTEM</constant>, have a look at the table
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found within the <function>ini_set</function> documentation.
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</para>
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<note>
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<simpara>
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With PHP 3.0, there are Apache directives that correspond to each
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configuration setting in the <filename>php3.ini</filename> name,
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except the name is prefixed by "php3_".
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</simpara>
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</note>
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<para>
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<variablelist>
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<varlistentry>
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<term>
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<systemitem role="directive">php_value</systemitem>
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<parameter>name</parameter>
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<parameter>value</parameter>
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</term>
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<listitem>
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<para>
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Sets the value of the specified directive.
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Can be used only with <constant>PHP_INI_ALL</constant> and <constant>PHP_INI_PERDIR</constant> type directives.
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To clear a previously set value use <literal>none</literal> as the value.
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</para>
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<note>
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<simpara>
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Don't use <literal>php_value</literal> to set boolean values.
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<literal>php_flag</literal> (see below) should be used instead.
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</simpara>
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</note>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<systemitem role="directive">php_flag</systemitem>
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<parameter>name</parameter>
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<parameter>on|off</parameter>
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</term>
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<listitem>
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<para>
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Used to set a Boolean configuration directive.
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Can be used only with <constant>PHP_INI_ALL</constant> and <constant>PHP_INI_PERDIR</constant> type directives.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<systemitem role="directive">php_admin_value</systemitem>
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<parameter>name</parameter>
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<parameter>value</parameter>
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</term>
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<listitem>
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<para>
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Sets the value of the specified directive.
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This can NOT be used in &htaccess; files.
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Any directive type set with <systemitem role="directive">php_admin_value</systemitem>
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can not be overridden by &htaccess; or virtualhost directives.
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To clear a previously set value use <literal>none</literal> as the value.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<systemitem role="directive">php_admin_flag</systemitem>
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<parameter>name</parameter>
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<parameter>on|off</parameter>
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</term>
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<listitem>
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<para>
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Used to set a Boolean configuration directive.
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This can NOT be used in &htaccess; files.
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Any directive type set with <systemitem role="directive">php_admin_flag</systemitem>
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can not be overridden by &htaccess; or virtualhost directives.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>
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<example>
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<title>Apache configuration example</title>
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<programlisting role="ini">
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<![CDATA[
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<IfModule mod_php4.c>
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php_value include_path ".:/usr/local/lib/php"
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php_admin_flag safe_mode on
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</IfModule>
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<IfModule mod_php3.c>
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php3_include_path ".:/usr/local/lib/php"
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php3_safe_mode on
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</IfModule>
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]]>
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</programlisting>
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</example>
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</para>
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<caution>
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<para>
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PHP constants do not exist outside of PHP. For example, in
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&httpd.conf; you can not use PHP constants
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such as <constant>E_ALL</constant> or <constant>E_NOTICE</constant>
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to set the <link linkend="ini.error-reporting">error_reporting</link>
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directive as they will have no meaning and will evaluate to
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<emphasis>0</emphasis>. Use the associated bitmask values instead.
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These constants can be used in &php.ini;
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</para>
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</caution>
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</sect2>
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<sect2 id="configuration.changes.windows">
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<title>Changing <literal>PHP</literal> configuration via the Windows registry</title>
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<simpara>
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When running PHP on Windows, the configuration values can be
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modified on per-directory basis using the Windows registry. The
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configuration values are stored in the registry key
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<literal>HKLM\SOFTWARE\PHP\Per Directory Values</literal>,
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in the sub-keys corresponding to the path names. For example, configuration
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values for the directory <literal>c:\inetpub\wwwroot</literal> would
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be stored in the key <literal>HKLM\SOFTWARE\PHP\Per Directory
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Values\c\inetpub\wwwroot</literal>. The settings for the
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directory would be active for any script running from this
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directory or any subdirectory of it. The values under the key
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should have the name of <link linkend="configuration">PHP
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configuration directive</link> and the string value. PHP
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constants in the values would not be parsed.
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</simpara>
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</sect2>
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<sect2 id="configuration.changes.other">
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<title>Other interfaces to <literal>PHP</literal></title>
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<para>
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Regardless of the interface to <literal>PHP</literal> you can change
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certain values at runtime of your scripts through
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<function>ini_set</function>. The following table provides an overview
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at which level a directive can be set/changed.
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</para>
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<para>
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<table>
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<title>Definition of PHP_INI_* constants</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Constant</entry>
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<entry>Value</entry>
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<entry>Meaning</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>PHP_INI_USER</entry>
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<entry>1</entry>
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<entry>Entry can be set in user scripts</entry>
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</row>
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<row>
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<entry>PHP_INI_PERDIR</entry>
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<entry>2</entry>
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<entry>
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Entry can be set in &php.ini;, &htaccess; or
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&httpd.conf;
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</entry>
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</row>
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<row>
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<entry>PHP_INI_SYSTEM</entry>
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<entry>4</entry>
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<entry>
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Entry can be set in &php.ini; or &httpd.conf;
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</entry>
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</row>
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<row>
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<entry>PHP_INI_ALL</entry>
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<entry>7</entry>
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<entry>Entry can be set anywhere</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</para>
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<para>
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You can view the settings of the configuration values in
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the output of <function>phpinfo</function>. You can also
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access the values of individual configuration directives using
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<function>ini_get</function> or <function>get_cfg_var</function>.
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</para>
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</sect2>
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</sect1>
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<sect1 id="configuration.directives">
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<title>Miscellaneous configuration directives</title>
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<para>
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This is not a complete list of PHP directives. Directives are listed
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in their appropriate locations so for example information on session
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directives is located in the
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<link linkend="ref.session">sessions chapter</link>.
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</para>
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<sect2 id="ini.sect.httpd-options">
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<title>Httpd Options</title>
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<para>
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<table>
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<title>Httpd Options</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Default</entry>
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<entry>Changeable</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>async_send</entry>
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<entry>"0"</entry>
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<entry>PHP_INI_ALL</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</para>
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<para>
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</para>
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</sect2>
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<sect2 id="ini.sect.language-options">
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<title>Language Options</title>
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<para>
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<table>
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<title>Language and Misc Configuration Options</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Default</entry>
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<entry>Changeable</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>short_open_tag</entry>
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<entry>On</entry>
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<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
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</row>
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<row>
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<entry>asp_tags</entry>
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<entry>Off</entry>
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<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
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</row>
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<row>
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<entry>precision</entry>
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<entry>"14"</entry>
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<entry>PHP_INI_ALL</entry>
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</row>
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<row>
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<entry>y2k_compliance</entry>
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<entry>Off</entry>
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<entry>PHP_INI_ALL</entry>
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</row>
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<row>
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<entry>allow_call_time_pass_reference</entry>
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<entry>On</entry>
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<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
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</row>
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<row>
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<entry>expose_php</entry>
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<entry>On</entry>
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<entry>PHP_INI_SYSTEM</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</para>
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&ini.descriptions.title;
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<para>
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<variablelist>
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<varlistentry id="ini.short-open-tag">
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<term>
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<parameter>short_open_tag</parameter>
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<type>boolean</type>
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</term>
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<listitem>
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<para>
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Tells whether the short form (<userinput><? ?></userinput>)
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of PHP's open tag should be allowed. If you want to use PHP in
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combination with XML, you can disable this option in order to
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use <userinput><?xml ?></userinput> inline. Otherwise, you
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can print it with PHP, for example: <userinput><?php echo '<?xml
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version="1.0"'; ?></userinput>. Also if disabled, you must use the
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long form of the PHP open tag (<userinput><?php ?></userinput>).
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</para>
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<note>
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<para>
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This directive also affects the shorthand <userinput><?=</userinput>,
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which is identical to <userinput><? echo</userinput>. Use of this
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shortcut requires <systemitem role="directive">short_open_tag</systemitem>
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to be on.
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</para>
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</note>
|
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</listitem>
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</varlistentry>
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<varlistentry id="ini.asp-tags">
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<term>
|
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<parameter>asp_tags</parameter>
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<type>boolean</type>
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</term>
|
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<listitem>
|
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<simpara>
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Enables the use of ASP-like <% %> tags in addition to
|
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the usual <?php ?> tags. This includes the
|
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variable-value printing shorthand of <%= $value %>. For
|
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more information, see <link
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linkend="language.basic-syntax.phpmode">Escaping from HTML</link>.
|
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</simpara>
|
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<note>
|
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<para>
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Support for ASP-style tags was added in 3.0.4.
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</para>
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</note>
|
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</listitem>
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</varlistentry>
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<varlistentry id="ini.precision">
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<term>
|
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<parameter>precision</parameter>
|
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<type>integer</type>
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</term>
|
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<listitem>
|
|
<simpara>
|
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The number of significant digits displayed in floating point numbers.
|
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</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.y2k-compliance">
|
|
<term>
|
|
<parameter>y2k_compliance</parameter>
|
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<type>boolean</type>
|
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</term>
|
|
<listitem>
|
|
<simpara>
|
|
Enforce year 2000 compliance (will cause problems with non-compliant browsers)
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
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|
|
|
|
<varlistentry id="ini.allow-call-time-pass-reference">
|
|
<term>
|
|
<parameter>allow_call_time_pass_reference</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Whether to enable the ability to force arguments to be passed by reference
|
|
at function call time. This method is deprecated and is likely to be
|
|
unsupported in future versions of PHP/Zend. The encouraged method of
|
|
specifying which arguments should be passed by reference is in the function
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|
declaration. You're encouraged to try and turn this option Off and make
|
|
sure your scripts work properly with it in order to ensure they will work
|
|
with future versions of the language (you will receive a warning each time
|
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you use this feature, and the argument will be passed by value instead of by
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reference).
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|
</para>
|
|
<para>
|
|
See also <link linkend="language.references">References Explained</link>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.expose-php">
|
|
<term>
|
|
<parameter>expose_php</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Decides whether PHP may expose the fact that it is installed on the server
|
|
(e.g. by adding its signature to the Web server header). It is no security
|
|
threat in any way, but it makes it possible to determine whether you use PHP
|
|
on your server or not.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</sect2>
|
|
|
|
<sect2 id="ini.sect.resource-limits">
|
|
<title>Resource Limits</title>
|
|
<para>
|
|
<table>
|
|
<title>Resource Limits</title>
|
|
<tgroup cols="3">
|
|
<thead>
|
|
<row>
|
|
<entry>Name</entry>
|
|
<entry>Default</entry>
|
|
<entry>Changeable</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>memory_limit</entry>
|
|
<entry>"8M"</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</para>
|
|
|
|
&ini.descriptions.title;
|
|
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry id="ini.memory-limit">
|
|
<term>
|
|
<parameter>memory_limit</parameter>
|
|
<type>integer</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
This sets the maximum amount of memory in bytes that a script
|
|
is allowed to allocate. This helps prevent poorly written
|
|
scripts for eating up all available memory on a server. In order to
|
|
use this directive you must have enabled it at compile time. So,
|
|
your configure line would have included:
|
|
<literal>--enable-memory-limit</literal>. Note that you have to set
|
|
it to -1 if you don't want any limit for your memory.
|
|
</para>
|
|
<para>
|
|
As of PHP 4.3.2, and when memory_limit is enabled, the PHP function
|
|
<function>memory_get_usage</function> is made available.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
<para>
|
|
See also: <link linkend="ini.max-execution-time">max_execution_time</link>.
|
|
</para>
|
|
</sect2>
|
|
|
|
<sect2 id="ini.sect.data-handling">
|
|
<title>Data Handling</title>
|
|
<para>
|
|
<table>
|
|
<title>Data Handling Configuration Options</title>
|
|
<tgroup cols="3">
|
|
<thead>
|
|
<row>
|
|
<entry>Name</entry>
|
|
<entry>Default</entry>
|
|
<entry>Changeable</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>track-vars</entry>
|
|
<entry>"On"</entry>
|
|
<entry>PHP_INI_??</entry>
|
|
</row>
|
|
<row>
|
|
<entry>arg_separator.output</entry>
|
|
<entry>"&"</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>arg_separator.input</entry>
|
|
<entry>"&"</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
<row>
|
|
<entry>variables_order</entry>
|
|
<entry>"EGPCS"</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>register_globals</entry>
|
|
<entry>"Off"</entry>
|
|
<entry>PHP_INI_PERDIR|PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>register_argc_argv</entry>
|
|
<entry>"On"</entry>
|
|
<entry>PHP_INI_PERDIR|PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>register_long_arrays</entry>
|
|
<entry>"On"</entry>
|
|
<entry>PHP_INI_PERDIR|PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>post_max_size</entry>
|
|
<entry>"8M"</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
<row>
|
|
<entry>gpc_order</entry>
|
|
<entry>"GPC"</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>auto_prepend_file</entry>
|
|
<entry>""</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
<row>
|
|
<entry>auto_append_file</entry>
|
|
<entry>""</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
<row>
|
|
<entry>default_mimetype</entry>
|
|
<entry>"text/html"</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>default_charset</entry>
|
|
<entry>"iso-8859-1"</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>always_populate_raw_post_data</entry>
|
|
<entry>"0"</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
<row>
|
|
<entry>allow_webdav_methods</entry>
|
|
<entry>"0"</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</para>
|
|
|
|
&ini.descriptions.title;
|
|
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry id="ini.track-vars">
|
|
<term>
|
|
<parameter>track_vars</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
If enabled, then Environment, GET, POST, Cookie, and Server
|
|
variables can be found in the global associative arrays
|
|
<varname>$_ENV</varname>,
|
|
<varname>$_GET</varname>,
|
|
<varname>$_POST</varname>,
|
|
<varname>$_COOKIE</varname>, and
|
|
<varname>$_SERVER</varname>.
|
|
</para>
|
|
<para>
|
|
Note that as of PHP 4.0.3, <systemitem
|
|
role="directive">track_vars</systemitem> is always turned on.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.arg-separator.output">
|
|
<term>
|
|
<parameter>arg_separator.output</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
The separator used in PHP generated URLs to separate arguments.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.arg-separator.input">
|
|
<term>
|
|
<parameter>arg_separator.input</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
List of separator(s) used by PHP to parse input URLs into variables.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
Every character in this directive is considered as separator!
|
|
</para>
|
|
</note>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.variables-order">
|
|
<term>
|
|
<parameter>variables_order</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Set the order of the EGPCS (Environment, GET, POST, Cookie,
|
|
Server) variable parsing. The default setting of this
|
|
directive is "EGPCS". Setting this to "GP", for example,
|
|
will cause PHP to completely ignore environment variables,
|
|
cookies and server variables, and to overwrite any GET
|
|
method variables with POST-method variables of the same name.
|
|
</para>
|
|
<para>
|
|
See also <link linkend="ini.register-globals">register_globals</link>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.register-globals">
|
|
<term>
|
|
<parameter>register_globals</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Tells whether or not to register the EGPCS (Environment, GET,
|
|
POST, Cookie, Server) variables as global variables. For example;
|
|
if register_globals = on, the url
|
|
<literal>http://www.example.com/test.php?id=3</literal> will produce
|
|
<varname>$id</varname>. Or, <varname>$DOCUMENT_ROOT</varname> from
|
|
<varname>$_SERVER['DOCUMENT_ROOT']</varname>. You may want to turn
|
|
this off if you don't want to clutter your scripts' global scope with
|
|
user data. As of PHP <ulink url="&url.php.release4.2.0;">4.2.0</ulink>,
|
|
this directive defaults to <emphasis>off</emphasis>. It's preferred to
|
|
go through PHP <link linkend="reserved.variables">Predefined Variables
|
|
</link> instead, such as the
|
|
<link linkend="language.variables.superglobals">superglobals</link>:
|
|
<varname>$_ENV</varname>, <varname>$_GET</varname>,
|
|
<varname>$_POST</varname>, <varname>$_COOKIE</varname>, and
|
|
<varname>$_SERVER</varname>. Please read the security chapter on
|
|
<link linkend="security.registerglobals">Using register_globals</link>
|
|
for related information.
|
|
</para>
|
|
<para>
|
|
Please note that <systemitem role="directive">register_globals</systemitem>
|
|
cannot be set at runtime (<function>ini_set</function>). Although, you can
|
|
use &htaccess; if your host allows it as described
|
|
above. An example &htaccess; entry:
|
|
<userinput>php_flag register_globals on</userinput>.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
<systemitem role="directive">register_globals</systemitem> is affected
|
|
by the <link linkend="ini.variables-order">variables_order</link>
|
|
directive.
|
|
</para>
|
|
</note>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.register-argc-argv">
|
|
<term>
|
|
<parameter>register_argc_argv</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
Tells PHP whether to declare the argv & argc variables
|
|
(that would contain the GET information).
|
|
</simpara>
|
|
<simpara>
|
|
See also <link linkend="features.commandline">command line</link>.
|
|
Also, this directive became available in PHP 4.0.0 and
|
|
was always "on" before that.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.register-long-arrays">
|
|
<term>
|
|
<parameter>register_long_arrays</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
Tells PHP whether or not to register the deprecated long
|
|
<varname>$HTTP_*_VARS</varname> type
|
|
<link linkend="language.variables.predefined">predefined
|
|
variables</link>. When On (default), long predefined PHP
|
|
variables like <varname>$HTTP_GET_VARS</varname> will be defined.
|
|
If you're not using them, it's recommended to turn them off,
|
|
for performance reasons. Instead, use the superglobal arrays,
|
|
like <varname>$_GET</varname>.
|
|
</simpara>
|
|
<simpara>
|
|
This directive became available in PHP 5.0.0.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.post-max-size">
|
|
<term>
|
|
<parameter>post_max_size</parameter>
|
|
<type>integer</type>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
Sets max size of post data allowed. This setting also affects
|
|
file upload. To upload large files, this value must be larger
|
|
than <link linkend="ini.upload-max-filesize">upload_max_filesize</link>.
|
|
</simpara>
|
|
<simpara>
|
|
If memory limit is enabled by your configure script, <link
|
|
linkend="ini.memory-limit">memory_limit</link> also affects
|
|
file uploading. Generally speaking,
|
|
<link linkend="ini.memory-limit">memory_limit</link> should be
|
|
larger than <parameter>post_max_size</parameter>.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.gpc-order">
|
|
<term>
|
|
<parameter>gpc_order</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Set the order of GET/POST/COOKIE variable parsing. The
|
|
default setting of this directive is "GPC". Setting this to
|
|
"GP", for example, will cause PHP to completely ignore cookies
|
|
and to overwrite any GET method variables with POST-method
|
|
variables of the same name.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
This option is not available in PHP 4.
|
|
Use <link linkend="ini.variables-order">variables_order</link>
|
|
instead.
|
|
</para>
|
|
</note>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.auto-prepend-file">
|
|
<term>
|
|
<parameter>auto_prepend_file</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the name of a file that is automatically parsed
|
|
before the main file. The file is included as if it was
|
|
called with the <function>include</function> function, so
|
|
<link linkend="ini.include-path">include_path</link> is used.</para>
|
|
<para>
|
|
The special value <systemitem class="constant">none</systemitem>
|
|
disables auto-prepending.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.auto-append-file">
|
|
<term>
|
|
<parameter>auto_append_file</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the name of a file that is automatically parsed
|
|
after the main file. The file is included as if it was
|
|
called with the <function>include</function> function, so
|
|
<link linkend="ini.include-path">include_path</link> is used.</para>
|
|
<para>
|
|
The special value <systemitem class="constant">none</systemitem>
|
|
disables auto-appending.
|
|
<note>
|
|
<simpara>
|
|
If the script is terminated with <function>exit</function>,
|
|
auto-append will <emphasis>not</emphasis> occur.</simpara>
|
|
</note>
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.default-mimetype">
|
|
<term>
|
|
<parameter>default_mimetype</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.default-charset">
|
|
<term>
|
|
<parameter>default_charset</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
As of 4.0b4, PHP always outputs a character encoding by default in
|
|
the Content-type: header. To disable sending of the charset, simply
|
|
set it to be empty.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.always-populate-raw-post-data">
|
|
<term>
|
|
<parameter>always_populate_raw_post_data</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Always populate the $HTTP_RAW_POST_DATA variable.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.allow-webdav-methods">
|
|
<term>
|
|
<parameter>allow_webdav_methods</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Allow handling of WebDAV http requests within PHP scripts (eg.
|
|
PROPFIND, PROPPATCH, MOVE, COPY, etc..)
|
|
If you want to get the post data of those requests, you have to
|
|
set <link linkend="ini.always-populate-raw-post-data">
|
|
always_populate_raw_post_data</link> as well.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
<para>
|
|
See also: <link linkend="ini.magic-quotes-gpc">magic_quotes_gpc</link>,
|
|
<link linkend="ini.magic-quotes-runtime">magic-quotes-runtime</link>,
|
|
and
|
|
<link linkend="ini.magic-quotes-sybase">magic_quotes_sybase</link>.
|
|
</para>
|
|
</sect2>
|
|
|
|
<sect2 id="ini.sect.path-directory">
|
|
<title>Paths and Directories</title>
|
|
<para>
|
|
<table>
|
|
<title>Paths and Directories Configuration Options</title>
|
|
<tgroup cols="3">
|
|
<thead>
|
|
<row>
|
|
<entry>Name</entry>
|
|
<entry>Default</entry>
|
|
<entry>Changeable</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>include_path</entry>
|
|
<entry>PHP_INCLUDE_PATH</entry>
|
|
<entry>PHP_INI_ALL</entry>
|
|
</row>
|
|
<row>
|
|
<entry>doc_root</entry>
|
|
<entry>PHP_INCLUDE_PATH</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>user_dir</entry>
|
|
<entry>NULL</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>extension_dir</entry>
|
|
<entry>PHP_EXTENSION_DIR</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>cgi.fix_pathinfo</entry>
|
|
<entry>"0"</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>cgi.force_redirect</entry>
|
|
<entry>"1"</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>cgi.redirect_status_env</entry>
|
|
<entry>""</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>fastcgi.impersonate</entry>
|
|
<entry>"0"</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>cgi.rfc2616_headers</entry>
|
|
<entry>"0"</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</para>
|
|
|
|
&ini.descriptions.title;
|
|
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry id="ini.include-path">
|
|
<term>
|
|
<parameter>include_path</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a list of directories where the
|
|
<function>require</function>, <function>include</function>
|
|
and <function>fopen_with_path</function> functions look for
|
|
files. The format is like the system's <envar>PATH</envar>
|
|
environment variable: a list of directories separated with a
|
|
colon in UNIX or semicolon in Windows.
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>UNIX include_path</title>
|
|
<programlisting role="php.ini">
|
|
<![CDATA[
|
|
include_path=".:/php/includes"
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>Windows include_path</title>
|
|
<programlisting role="php.ini">
|
|
<![CDATA[
|
|
include_path=".;c:\php\includes"
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
<para>
|
|
Using a <literal>.</literal> in the include path allows for
|
|
relative includes as it means the current directory.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.doc-root">
|
|
<term>
|
|
<parameter>doc_root</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
PHP's "root directory" on the server. Only used if
|
|
non-empty. If PHP is configured with &safemode;, no files outside
|
|
this directory are served.
|
|
If PHP was not compiled with FORCE_REDIRECT, you SHOULD set doc_root
|
|
if you are running php as a CGI under any web server (other than IIS)
|
|
The alternative is to use the <link linkend="ini.cgi.force-redirect">
|
|
cgi.force_redirect</link> configuration below.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.user-dir">
|
|
<term>
|
|
<parameter>user_dir</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
The base name of the directory used on a user's home
|
|
directory for <literal>PHP</literal> files, for example
|
|
<literal>public_html</literal>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.extension-dir">
|
|
<term>
|
|
<parameter>extension_dir</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
In what directory PHP should look for dynamically loadable
|
|
extensions. See also: <link linkend="ini.enable-dl">enable_dl</link>,
|
|
and <function>dl</function>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.extension">
|
|
<term>
|
|
<parameter>extension</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Which dynamically loadable extensions to load when PHP starts
|
|
up.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.cgi.fix_pathinfo">
|
|
<term>
|
|
<parameter>cgi.fix_pathinfo</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Provides <emphasis>real</emphasis> PATH_INFO/PATH_TRANSLATED
|
|
support for CGI. PHP's previous behaviour was to set
|
|
PATH_TRANSLATED to SCRIPT_FILENAME, and to not grok what PATH_INFO
|
|
is. For more information on PATH_INFO, see the cgi specs. Setting
|
|
this to 1 will cause PHP CGI to fix it's paths to conform to the
|
|
spec. A setting of zero causes PHP to behave as before. Default
|
|
is zero. You should fix your scripts to use SCRIPT_FILENAME rather
|
|
than PATH_TRANSLATED.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.cgi.force-redirect">
|
|
<term>
|
|
<parameter>cgi.force_redirect</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
cgi.force_redirect is necessary to provide security running PHP as a
|
|
CGI under most web servers. Left undefined, PHP turns this on by
|
|
default. You can turn it off <emphasis>AT YOUR OWN RISK</emphasis>.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
Windows Users: You CAN safely turn this off for IIS, in fact, you MUST.
|
|
To get OmniHTTPD or Xitami to work you MUST turn it off.
|
|
</para>
|
|
</note>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.cgi.redirect-status-env">
|
|
<term>
|
|
<parameter>cgi.redirect_status_env</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
If cgi.force_redirect is turned on, and you are not running under
|
|
Apache or Netscape (iPlanet) web servers, you MAY need to set an
|
|
environment variable name that PHP will look for to know it is OK
|
|
to continue execution.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
Setting this variable MAY cause security issues,
|
|
KNOW WHAT YOU ARE DOING FIRST.
|
|
</para>
|
|
</note>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.fastcgi.impersonate">
|
|
<term>
|
|
<parameter>fastcgi.impersonate</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
FastCGI under IIS (on WINNT based OS) supports the ability to impersonate
|
|
security tokens of the calling client. This allows IIS to define the
|
|
security context that the request runs under. mod_fastcgi under Apache
|
|
does not currently support this feature (03/17/2002)
|
|
Set to 1 if running under IIS. Default is zero.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.cgi.rfc2616-headers">
|
|
<term>
|
|
<parameter>cgi.rfc2616_headers</parameter>
|
|
<type>int</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Tells PHP what type of headers to use when sending HTTP response
|
|
code. If it's set 0, PHP sends a Status: header that is supported
|
|
by Apache and other web servers. When this option is set to 1, PHP
|
|
will send <ulink url="&url.rfc;2616">RFC 2616</ulink> compliant
|
|
headers. Leave it set to 0 unless you know what you're doing.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</sect2>
|
|
|
|
<sect2 id="ini.sect.file_uploads">
|
|
<title>File Uploads</title>
|
|
<para>
|
|
<table>
|
|
<title>File Uploads Configuration Options</title>
|
|
<tgroup cols="3">
|
|
<thead>
|
|
<row>
|
|
<entry>Name</entry>
|
|
<entry>Default</entry>
|
|
<entry>Changeable</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>file_uploads</entry>
|
|
<entry>"1"</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>upload_tmp_dir</entry>
|
|
<entry>NULL</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
<row>
|
|
<entry>upload_max_filesize</entry>
|
|
<entry>"2M"</entry>
|
|
<entry>PHP_INI_SYSTEM|PHP_INI_PERDIR</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</para>
|
|
|
|
&ini.descriptions.title;
|
|
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry id="ini.file-uploads">
|
|
<term>
|
|
<parameter>file_uploads</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Whether or not to allow HTTP
|
|
<link linkend="features.file-upload">file uploads</link>. See also
|
|
the
|
|
<link linkend="ini.upload-max-filesize">upload_max_filesize</link>,
|
|
<link linkend="ini.upload-tmp-dir">upload_tmp_dir</link>, and
|
|
<link linkend="ini.post-max-size">post_max_size</link> directives.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.upload-tmp-dir">
|
|
<term>
|
|
<parameter>upload_tmp_dir</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
The temporary directory used for storing files when doing
|
|
file upload. Must be writable by whatever user <literal>PHP</literal>
|
|
is running as. If not specified PHP will use the system's default.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.upload-max-filesize">
|
|
<term>
|
|
<parameter>upload_max_filesize</parameter>
|
|
<type>integer</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
The maximum size of an uploaded file.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</sect2>
|
|
|
|
<sect2 id="ini.sql-general">
|
|
<title>General SQL</title>
|
|
<para>
|
|
<table>
|
|
<title>General SQL Configuration Options</title>
|
|
<tgroup cols="3">
|
|
<thead>
|
|
<row>
|
|
<entry>Name</entry>
|
|
<entry>Default</entry>
|
|
<entry>Changeable</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry>sql.safe_mode</entry>
|
|
<entry>"0"</entry>
|
|
<entry>PHP_INI_SYSTEM</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</para>
|
|
|
|
&ini.descriptions.title;
|
|
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry id="ini.sql.safe-mode">
|
|
<term>
|
|
<parameter>sql.safe_mode</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</sect2>
|
|
|
|
<sect2 id="ini.sect.debugger">
|
|
<title>Debugger Configuration Directives</title>
|
|
<caution>
|
|
<para>
|
|
Only PHP 3 implements a default debugger, for more information see <xref
|
|
linkend="debugger"/>.
|
|
</para>
|
|
</caution>
|
|
|
|
<variablelist>
|
|
<varlistentry id="ini.debugger.host">
|
|
<term>
|
|
<parameter>debugger.host</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
DNS name or IP address of host used by the debugger.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.debugger.port">
|
|
<term>
|
|
<parameter>debugger.port</parameter>
|
|
<type>string</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Port number used by the debugger.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry id="ini.debugger.enabled">
|
|
<term>
|
|
<parameter>debugger.enabled</parameter>
|
|
<type>boolean</type>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
Whether the debugger is enabled.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
</sect2>
|
|
|
|
</sect1>
|
|
|
|
</chapter>
|
|
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:t
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
indent-tabs-mode:nil
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"../../manual.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:nil
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
vim600: syn=xml fen fdm=syntax fdl=2 si
|
|
vim: et tw=78 syn=sgml
|
|
vi: ts=1 sw=1
|
|
-->
|