mirror of
https://github.com/sigmasternchen/php-doc-en
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5b9fc29465
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@78496 c90b9560-bf6c-de11-be94-00142212c4b1
81 lines
2.6 KiB
XML
81 lines
2.6 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.2 $ -->
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<!-- splitted from ./en/functions/info.xml, last change in rev 1.2 -->
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<refentry id="function.putenv">
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<refnamediv>
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<refname>putenv</refname>
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<refpurpose>Sets the value of an environment variable</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>void</type><methodname>putenv</methodname>
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<methodparam><type>string</type><parameter>setting</parameter></methodparam>
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</methodsynopsis>
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<para>
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Adds <parameter>setting</parameter> to the server environment.
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The environment variable will only exist for the duration of the
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current request. At the end of the request the environment is
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restored to its original state.
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</para>
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<para>
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Setting certain environment variables may be a potential security
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breach. The <literal>safe_mode_allowed_env_vars</literal>
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directive contains a comma-delimited list of prefixes. In Safe
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Mode, the user may only alter environment variables whose names
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begin with the prefixes supplied by this directive. By default,
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users will only be able to set environment variables that begin
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with <literal>PHP_</literal>
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(e.g. <literal>PHP_FOO=BAR</literal>). Note: if this directive is
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empty, PHP will let the user modify ANY environment variable!
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</para>
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<para>
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The <literal>safe_mode_protected_env_vars</literal> directive
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contains a comma-delimited list of environment variables, that
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the end user won't be able to change using
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<function>putenv</function>. These variables will be protected
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even if <literal>safe_mode_allowed_env_vars</literal> is set to
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allow to change them.
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</para>
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<warning>
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<para>
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These directives have only effect when <link
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linkend="features.safe-mode">safe-mode</link> itself is enabled!
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</para>
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</warning>
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<para>
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<example>
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<title>Setting an Environment Variable</title>
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<programlisting role="php">
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<![CDATA[
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putenv ("UNIQID=$uniqid");
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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See also <function>getenv</function>.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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