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https://github.com/sigmasternchen/php-doc-en
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1634a88641
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@330340 c90b9560-bf6c-de11-be94-00142212c4b1
81 lines
2.5 KiB
XML
81 lines
2.5 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<book xml:id="book.pcre" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<?phpdoc extension-membership="bundled" ?>
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<title>Regular Expressions (Perl-Compatible)</title>
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<titleabbrev>PCRE</titleabbrev>
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<preface xml:id="intro.pcre">
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&reftitle.intro;
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<para>
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The syntax for patterns used in these functions closely resembles
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Perl. The expression must be enclosed in the delimiters, a
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forward slash (/), for example. Delimiters can be any
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non-alphanumeric, non-whitespace ASCII character except the backslash (\) and the
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null byte. If the delimiter character has to be used in the
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expression itself, it needs to be escaped by backslash. Since PHP
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4.0.4, you can also use Perl-style (), {}, [], and <>
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matching delimiters.
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See <link linkend="reference.pcre.pattern.syntax">Pattern Syntax</link>
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for detailed explanation.
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</para>
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<para>
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The ending delimiter may be followed by various modifiers that
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affect the matching.
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See <link linkend="reference.pcre.pattern.modifiers">Pattern
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Modifiers</link>.
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</para>
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<para>
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PHP also supports regular expressions using a POSIX-extended syntax
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using the <link linkend="book.regex">POSIX-extended regex functions</link>.
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</para>
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<note>
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<para>
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This extension maintains a global per-thread cache of compiled regular
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expressions (up to 4096).
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</para>
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</note>
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<warning>
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<para>
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You should be aware of some limitations of PCRE. Read <link
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xlink:href="&url.pcre.man;">&url.pcre.man;</link> for more info.
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</para>
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</warning>
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<para>
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The PCRE library is a set of functions that implement regular
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expression pattern matching using the same syntax and semantics
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as Perl 5, with just a few differences (see below). The current
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implementation corresponds to Perl 5.005.
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</para>
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</preface>
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&reference.pcre.setup;
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&reference.pcre.constants;
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&reference.pcre.examples;
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&reference.pcre.pattern;
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&reference.pcre.reference;
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</book>
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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:"~/.phpdoc/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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