mirror of
https://github.com/sigmasternchen/php-doc-en
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What's done: the migration guide itself, updates to existing functions and functionality, and new language features. What's not done: stub pages for new functions and methods. (I'd rather get this in now, though, than have it languish on my hard drive any longer so that other people can contribute.) What could use help: the generator chapter is pretty rough and ready. Better examples would be awesome. I certainly won't argue if somebody wants to add the function stubs, either. git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@328430 c90b9560-bf6c-de11-be94-00142212c4b1
968 lines
30 KiB
XML
968 lines
30 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<appendix xml:id="migration5" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<title>Migrating from PHP 4 to PHP 5.0.x</title>
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<para>
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&manual.migration.seealso;
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<link linkend="migration51">5.1.x</link>,
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<link linkend="migration52">5.2.x</link>,
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<link linkend="migration53">5.3.x</link>,
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<link linkend="migration54">5.4.x</link> and
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<link linkend="migration55">5.5.x</link>.
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</para>
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<section xml:id="migration5.changes">
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<title>What has changed in PHP 5.0.x</title>
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<para>
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PHP 5 and the integrated Zend Engine 2 have greatly improved PHP's
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performance and capabilities, but great care has been taken to break as
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little existing code as possible. So migrating your code from PHP 4 to 5
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should be very easy. Most existing PHP 4 code should be ready to run
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without changes, but you should still know about the <link
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linkend="migration5.incompatible">few differences</link> and
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take care to test your code before switching versions in production
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environments.
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</para>
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</section>
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<section xml:id="migration5.incompatible">
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<title>Backward Incompatible Changes</title>
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<para>
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Although most existing PHP 4 code should work without changes, you should
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pay attention to the following backward incompatible changes:
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</para>
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<itemizedlist>
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<listitem>
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<simpara>
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There are some <link linkend="reserved.keywords">new reserved
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keywords</link>.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>strrpos</function> and <function>strripos</function> now use
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the entire string as a needle.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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Illegal use of string offsets causes <constant>E_ERROR</constant> instead
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of <constant>E_WARNING</constant>. An example illegal use is:
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<literal>$str = 'abc'; unset($str[0]);</literal>.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_merge</function> was changed to accept only arrays. If a
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non-array variable is passed, a <constant>E_WARNING</constant> will be
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thrown for every such parameter. Be careful because your code may start
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emitting <constant>E_WARNING</constant> out of the blue.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<constant>PATH_TRANSLATED</constant> server variable is no longer set implicitly under
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Apache2 SAPI in contrast to the situation in PHP 4, where it is set to
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the same value as the <constant>SCRIPT_FILENAME</constant> server variable when it is not
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populated by Apache. This change was made to comply with the <link
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xlink:href="&url.rfc;3875">CGI/1.1 specification</link>. Please refer to <link
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xlink:href="&url.php.bugs;23610">bug #23610</link> for further information,
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and see also the <varname>$_SERVER['PATH_TRANSLATED']</varname>
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description in the manual. This issue
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also affects PHP versions >= 4.3.2.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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The <constant>T_ML_COMMENT</constant> constant is no longer defined by
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the <link linkend="ref.tokenizer">Tokenizer</link> extension. If
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error_reporting is set to <constant>E_ALL</constant>, PHP will
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generate a notice. Although the <constant>T_ML_COMMENT</constant> was
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never used at all, it was defined in PHP 4. In both PHP 4 and PHP 5
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// and /* */ are resolved as the <constant>T_COMMENT</constant>
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constant. However the PHPDoc style comments <literal>/** */</literal>, which starting PHP
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5 are parsed by PHP, are recognized as <constant>T_DOC_COMMENT</constant>.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<varname>$_SERVER</varname> should be populated with <varname>argc</varname> and
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<varname>argv</varname> if
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<link linkend="ini.variables-order">variables_order</link> includes "S".
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If you have specifically configured your system to not create
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<varname>$_SERVER</varname>, then of course it shouldn't be there.
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The change was to always make <varname>argc</varname>
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and <varname>argv</varname> available in the CLI version regardless of the
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<link linkend="ini.variables-order">variables_order</link> setting.
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As in, the CLI version will now always populate the global
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<varname>$argc</varname> and <varname>$argv</varname> variables.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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An object with no properties is no longer considered "empty".
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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In some cases classes must be declared before use. It only happens if
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some of the new features of PHP 5 (such as <link
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linkend="language.oop5.interfaces">interfaces</link>) are used.
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Otherwise the behaviour is the old.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>get_class</function>, <function>get_parent_class</function>
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and <function>get_class_methods</function> now return the name of the
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classes/methods as they were declared (case-sensitive) which may lead to
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problems in older scripts that rely on the previous behaviour (the
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class/method name was always returned lowercased). A possible solution
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is to search for those functions in all your scripts and use
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<function>strtolower</function>.
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</simpara>
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<simpara>
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This case sensitivity change also applies to the
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<link linkend="language.constants.predefined">magical predefined
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constants</link> <constant>__CLASS__</constant>,
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<constant>__METHOD__</constant>, and <constant>__FUNCTION__</constant>.
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The values are returned exactly as they're declared (case-sensitive).
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>ip2long</function> now returns &false; when an invalid IP
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address is passed as argument to the function, and no longer
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<literal>-1</literal>.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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If there are functions defined in the included file, they can be used in the
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main file independent if they are before <function>return</function> or after.
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If the file is included twice, PHP 5 issues fatal error because functions
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were already declared, while PHP 4 doesn't complain about it.
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It is recommended to use <function>include_once</function> instead of
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checking if the file was already included and conditionally return inside
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the included file.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>include_once</function> and <function>require_once</function>
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first normalize the path of included file on Windows so that including
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A.php and a.php include the file just once.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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Passing an array to a function by value no longer resets the
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array's internal pointer for array accesses made within the
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function. In other words, in PHP 4 when you passed an array to a
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function, its internal pointer inside the function would be
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reset, while in PHP 5, when you pass an array to a function, its
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array pointer within the function will be wherever it was when
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the array was passed to the function.
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</simpara>
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</listitem>
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</itemizedlist>
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<para>
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<example>
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<title><function>strrpos</function> and <function>strripos</function> now
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use the entire string as a needle</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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var_dump(strrpos('ABCDEF','DEF')); //int(3)
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var_dump(strrpos('ABCDEF','DAF')); //bool(false)
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?>
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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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<example>
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<title>An object with no properties is no longer considered "empty"</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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class test { }
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$t = new test();
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var_dump(empty($t)); // echo bool(false)
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if ($t) {
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// Will be executed
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}
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?>
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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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<example>
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<title>In some cases classes must be declared before used</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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//works with no errors:
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$a = new a();
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class a {
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}
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//throws an error:
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$a = new b();
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interface c{
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}
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class b implements c {
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}
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</section>
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<section xml:id="migration5.cli-cgi">
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<title>CLI and CGI</title>
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<para>
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In PHP 5 there were some changes in CLI and CGI filenames. In PHP 5, the
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CGI version was renamed to <filename>php-cgi.exe</filename> (previously
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<filename>php.exe</filename>) and the CLI version now sits in the main
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directory (previously <filename>cli/php.exe</filename>).
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</para>
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<para>
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In PHP 5 it was also introduced a new mode:
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<filename>php-win.exe</filename>. This is equal to the CLI version, except
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that php-win doesn't output anything and thus provides no console (no "dos
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box" appears on the screen). This behavior is similar to php-gtk.
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</para>
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<para>
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In PHP 5, the CLI version will always populate the global
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<varname>$argv</varname> and <varname>$argc</varname> variables regardless
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of any &php.ini; directive setting. Even having
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<link linkend="ini.register-argc-argv">register_argc_argv</link> set to
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<literal>off</literal> will have no affect in CLI.
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</para>
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<para>
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See also the <link linkend="features.commandline">command line
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reference</link>.
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</para>
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</section>
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<section xml:id="migration5.configuration">
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<title>Migrating Configuration Files</title>
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<para>
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Since the ISAPI modules changed their names, from php4xxx to php5xxx, you
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need to make some changes in the configuration files. There were also
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changes in the CLI and CGI filenames. Please refer to the <link
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linkend="migration5.cli-cgi">corresponding section</link> for more
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information.
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</para>
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<para>
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Migrating the Apache configuration is extremely easy. See the example below
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to check the change you need to do:
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<example>
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<title>Migrating Apache configuration files for PHP 5</title>
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<programlisting role="apache-conf">
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<![CDATA[
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# change this line:
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LoadModule php4_module /php/sapi/php4apache2.dll
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# with this one:
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LoadModule php5_module /php/php5apache2.dll
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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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If your web server is running PHP in CGI mode, you should note that the
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CGI version has changed its name from <filename>php.exe</filename> to
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<filename>php-cgi.exe</filename>.
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In Apache, you should do something like this:
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<example>
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<title>Migrating Apache configuration files for PHP 5, CGI mode</title>
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<programlisting role="apache-conf">
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<![CDATA[
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# change this line:
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Action application/x-httpd-php "/php/php.exe"
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# with this one:
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Action application/x-httpd-php "/php/php-cgi.exe"
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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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In other web servers you need to change either the CGI or the ISAPI module
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filenames.
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</para>
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</section>
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<section xml:id="migration5.functions">
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<title>New Functions</title>
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<para>
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In PHP 5 there are some new functions. Here is the list of them:
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</para>
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<para><link linkend="ref.array">Arrays</link>:</para>
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<itemizedlist>
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<listitem>
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<simpara>
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<function>array_combine</function> - Creates an array by using one array
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for keys and another for its values
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_diff_uassoc</function> - Computes the difference of
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arrays with additional index check which is performed by a user supplied
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callback function
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_udiff</function> - Computes the difference of arrays by
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using a callback function for data comparison
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_udiff_assoc</function> - Computes the difference of
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arrays with additional index check. The data is compared by using a
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callback function
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_udiff_uassoc</function> - Computes the difference of
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arrays with additional index check. The data is compared by using a
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callback function. The index check is done by a callback function also
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_walk_recursive</function> - Apply a user function
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recursively to every member of an array
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_uintersect_assoc</function> - Computes the intersection of
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arrays with additional index check. The data is compared by using a
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callback function
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_uintersect_uassoc</function> - Computes the intersection of
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arrays with additional index check. Both the data and the indexes are compared
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by using separate callback functions
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>array_uintersect</function> - Computes the intersection of arrays.
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The data is compared by using a callback function
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</simpara>
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</listitem>
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</itemizedlist>
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<para><link linkend="ref.ibase">InterBase</link>:</para>
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<itemizedlist>
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<listitem>
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<simpara>
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<function>ibase_affected_rows</function> - Return the number of rows
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that were affected by the previous query
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>ibase_backup</function> - Initiates a backup task in the
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service manager and returns immediately
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>ibase_commit_ret</function> - Commit a transaction without
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closing it
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>ibase_db_info</function> - Request statistics about a
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database
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>ibase_drop_db</function> - Drops a database
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<function>ibase_errcode</function> - Return an error code
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</simpara>
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|
</listitem>
|
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<listitem>
|
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<simpara>
|
|
<function>ibase_free_event_handler</function> - Cancels a registered
|
|
event handler
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</simpara>
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|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_gen_id</function> - Increments the named generator and
|
|
returns its new value
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</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_maintain_db</function> - Execute a maintenance command
|
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on the database server
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_name_result</function> - Assigns a name to a result set
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_num_params</function> - Return the number of parameters
|
|
in a prepared query
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_param_info</function> - Return information about a
|
|
parameter in a prepared query
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|
</simpara>
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|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_restore</function> - Initiates a restore task in the
|
|
service manager and returns immediately
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_rollback_ret</function> - Rollback transaction and
|
|
retain the transaction context
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_server_info</function> - Request statistics about a
|
|
database server
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_service_attach</function> - Connect to the service manager
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_service_detach</function> - Disconnect from the
|
|
service manager
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_set_event_handler</function> - Register a callback
|
|
function to be called when events are posted
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|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ibase_wait_event</function> - Wait for an event to be posted
|
|
by the database
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para><link linkend="ref.iconv">iconv</link>:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_mime_decode</function> - Decodes a MIME header field
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_mime_decode_headers</function> - Decodes multiple MIME
|
|
header fields at once
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_mime_encode</function> - Composes a MIME header field
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_strlen</function> - Returns the character count of
|
|
string
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_strpos</function> - Finds position of first occurrence
|
|
of a needle within a haystack
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_strrpos</function> - Finds the last occurrence of a
|
|
needle within a haystack
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>iconv_substr</function> - Cut out part of a string
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para><link linkend="ref.stream">Streams</link>:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_copy_to_stream</function> - Copies data from one stream
|
|
to another
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_get_line</function> - Gets line from stream resource up
|
|
to a given delimiter
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_socket_accept</function> - Accept a connection on a
|
|
socket created by <function>stream_socket_server</function>
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_socket_client</function> - Open Internet or Unix domain
|
|
socket connection
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_socket_get_name</function> - Retrieve the name of the
|
|
local or remote sockets
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_socket_recvfrom</function> - Receives data from a
|
|
socket, connected or not
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_socket_sendto</function> - Sends a message to a socket,
|
|
whether it is connected or not
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>stream_socket_server</function> - Create an Internet or Unix
|
|
domain server socket
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para><link linkend="ref.datetime">Date and time related</link>:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
<function>idate</function> - Format a local time/date as integer
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>date_sunset</function> - Time of sunset for a given day and
|
|
location
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>date_sunrise</function> - Time of sunrise for a given day and
|
|
location
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>time_nanosleep</function> - Delay for a number of seconds and
|
|
nanoseconds
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para><link linkend="ref.strings">Strings</link>:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
<function>str_split</function> - Convert a string to an array
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>strpbrk</function> - Search a string for any of a set of
|
|
characters
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>substr_compare</function> - Binary safe optionally case
|
|
insensitive comparison of two strings from an offset, up to length
|
|
characters
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para>Other:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
<function>convert_uudecode</function> - decode a uuencoded string
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>convert_uuencode</function> - uuencode a string
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>curl_copy_handle</function> - Copy a cURL handle
|
|
along with all of its preferences
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>dba_key_split</function> - Splits a key in string
|
|
representation into array representation
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>dbase_get_header_info</function> - Get the header info of a
|
|
dBase database
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>dbx_fetch_row</function> - Fetches rows from a query-result
|
|
that had the <constant>DBX_RESULT_UNBUFFERED</constant> flag set
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>fbsql_set_password</function> - Change the password for a
|
|
given user
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>file_put_contents</function> - Write a string to a file
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ftp_alloc</function> - Allocates space for a file to be
|
|
uploaded
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>get_declared_interfaces</function> - Returns an array of all
|
|
declared interfaces
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>get_headers</function> - Fetches all the headers sent by the
|
|
server in response to a HTTP request
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>headers_list</function> - Returns a list of response headers
|
|
sent (or ready to send)
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>http_build_query</function> - Generate URL-encoded query string
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>image_type_to_extension</function> - Get file extension for
|
|
image-type returned by <function>getimagesize</function>,
|
|
<function>exif_read_data</function>,
|
|
<function>exif_thumbnail</function>,
|
|
<function>exif_imagetype</function>
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>imagefilter</function> - Applies a filter to an image using
|
|
custom arguments
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>imap_getacl</function> - Gets the ACL for a given mailbox
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>ldap_sasl_bind</function> - Bind to LDAP directory using SASL
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>mb_list_encodings</function> - Returns an array of all
|
|
supported encodings
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>pcntl_getpriority</function> - Get the priority of any
|
|
process
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>pcntl_wait</function> - Waits on or returns the status of a
|
|
forked child as defined by the <literal>waitpid()</literal> system call
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>pg_version</function> - Returns an array with client, protocol
|
|
and server version (when available)
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>php_check_syntax</function> - Check the syntax of the
|
|
specified file
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>php_strip_whitespace</function> - Return source with stripped
|
|
comments and whitespace
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>proc_nice</function> - Change the priority of the current
|
|
process
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>pspell_config_data_dir</function> - Change location of
|
|
language data files
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>pspell_config_dict_dir</function> - Change location of the
|
|
main word list
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>setrawcookie</function> - Send a cookie without URL-encoding
|
|
the value
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>scandir</function> - List files and directories inside the
|
|
specified path
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>snmp_read_mib</function> - Reads and parses a MIB file into
|
|
the active MIB tree
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<function>sqlite_fetch_column_types</function> - Return an array of
|
|
column types from a particular table
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
<note>
|
|
<para>
|
|
The <link linkend="ref.tidy">Tidy</link> extension has also changed its
|
|
API completely.
|
|
</para>
|
|
</note>
|
|
</section>
|
|
|
|
|
|
<section xml:id="migration5.newconf">
|
|
<title>New Directives</title>
|
|
<para>
|
|
There were some new &php.ini; directives introduced in PHP 5. Here is a
|
|
list of them:
|
|
</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
mail.force_extra_parameters - Force the addition of the specified
|
|
parameters to be passed as extra parameters to the sendmail binary.
|
|
These parameters will always replace the value of the 5th parameter to
|
|
<function>mail</function>, even in safe mode
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<link linkend="ini.register-long-arrays">register_long_arrays</link> -
|
|
allow/disallow PHP to register the deprecated long <varname>$HTTP_*_VARS</varname>
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<link linkend="ini.session.hash-function">session.hash_function</link> -
|
|
select a hash function (MD5 or SHA-1)
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<link
|
|
linkend="ini.session.hash-bits-per-character">session.hash_bits_per_character</link>
|
|
- define how many bits are stored in each character when converting the
|
|
binary hash data to something readable (from 4 to 6)
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<link linkend="ini.zend.ze1-compatibility-mode">zend.ze1_compatibility_mode</link>
|
|
- Enable compatibility mode with Zend Engine 1 (PHP 4)
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
|
|
<section xml:id="migration5.databases">
|
|
<title>Databases</title>
|
|
<para>
|
|
There were some changes in PHP 5 regarding databases (MySQL and SQLite).
|
|
</para>
|
|
<para>
|
|
In PHP 5 the MySQL client libraries are not bundled, because of license
|
|
problems and some others. For more information, read the <link
|
|
linkend="faq.databases.mysql.php5">FAQ entry</link>.
|
|
</para>
|
|
<para>
|
|
There is also a new extension, <link linkend="ref.mysqli">MySQLi (Improved
|
|
MySQL)</link>, which is designed to work with MySQL 4.1 and above.
|
|
</para>
|
|
<para>
|
|
Since PHP 5, the <link linkend="ref.sqlite">SQLite</link> extension is
|
|
built-in PHP. SQLite is an embeddable SQL database engine and is not a
|
|
client library used to connect to a big database server (like MySQL or
|
|
PostgreSQL). The SQLite library reads and writes directly to and from the
|
|
database files on disk.
|
|
</para>
|
|
</section>
|
|
|
|
|
|
<section xml:id="migration5.oop">
|
|
<title>New Object Model</title>
|
|
<para>
|
|
In PHP 5 there is a new Object Model. PHP's handling of objects has been
|
|
completely rewritten, allowing for better performance and more features.
|
|
In previous versions of PHP, objects were handled like primitive types
|
|
(for instance integers and strings). The drawback of this method was that
|
|
semantically the whole object was copied when a variable was assigned, or
|
|
passed as a parameter to a method. In the new approach, objects are
|
|
referenced by handle, and not by value (one can think of a handle as an
|
|
object's identifier).
|
|
</para>
|
|
<para>
|
|
Many PHP programmers aren't even aware of the copying quirks of the old
|
|
object model and, therefore, the majority of PHP applications will work
|
|
out of the box, or with very few modifications.
|
|
</para>
|
|
<para>
|
|
The new Object Model is documented at the <link
|
|
linkend="language.oop5">Language Reference</link>.
|
|
</para>
|
|
<para>
|
|
In PHP 5, function with the name of a class is called as a constructor
|
|
only if defined in the same class. In PHP 4, it is called also if defined
|
|
in the parent class.
|
|
</para>
|
|
<para>
|
|
See also the <link linkend="ini.zend.ze1-compatibility-mode">
|
|
zend.ze1_compatibility_mode</link> directive for compatability with
|
|
PHP 4.
|
|
</para>
|
|
</section>
|
|
|
|
<section xml:id="migrating5.errorrep">
|
|
<title>Error Reporting</title>
|
|
<para>
|
|
As of PHP 5 the error reporting
|
|
constant <constant>E_STRICT</constant> is available, with the
|
|
value <literal>2048</literal>. When enabled, messages will be
|
|
issued to warn you about code usage which is deprecated or which
|
|
may not be future-proof.
|
|
</para>
|
|
<note>
|
|
<simpara>
|
|
<constant>E_ALL</constant> does not include <constant>E_STRICT</constant>,
|
|
so it's not enabled by default. You must explicitly set the error
|
|
reporting level to include <constant>E_STRICT</constant> in order
|
|
to see these messages.
|
|
</simpara>
|
|
</note>
|
|
<para>
|
|
See <link linkend="errorfunc.constants">Predefined Constants</link> for more information.
|
|
</para>
|
|
</section>
|
|
|
|
</appendix>
|
|
|
|
|
|
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|
|
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|
|
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|
|
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|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
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|
|
sgml-indent-step:1
|
|
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|
|
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|
|
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|
|
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
|
|
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|
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|
|
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|
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|
|
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|
|
vim: et tw=78 syn=sgml
|
|
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|
|
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|