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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@151128 c90b9560-bf6c-de11-be94-00142212c4b1
86 lines
2.5 KiB
XML
86 lines
2.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.6 $ -->
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<!-- splitted from ./en/functions/pcre.xml, last change in rev 1.2 -->
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<refentry id="function.preg-grep">
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<refnamediv>
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<refname>preg_grep</refname>
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<refpurpose>
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Return array entries that match the pattern
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</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>array</type><methodname>preg_grep</methodname>
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<methodparam><type>string</type><parameter>pattern</parameter></methodparam>
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<methodparam><type>array</type><parameter>input</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>flags</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>preg_grep</function> returns the array consisting of
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the elements of the <parameter>input</parameter> array that match
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the given <parameter>pattern</parameter>.
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</para>
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<para>
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<parameter>flags</parameter> can be the following flag:
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<variablelist>
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<varlistentry>
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<term>PREG_GREP_INVERT</term>
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<listitem>
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<simpara>
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If this flag is passed, <function>preg_grep</function> returns the
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elements of the input array that do <emphasis>not</emphasis> match
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the given <parameter>pattern</parameter>.
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This flag is available since PHP 4.2.0.
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</simpara>
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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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Since PHP 4.0.4, the results returned by <function>preg_grep</function>
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are indexed using the keys from the input array. If this behavior is
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undesirable, use <function>array_values</function> on the array returned by
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<function>preg_grep</function> to reindex the values.
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</para>
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<para>
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<example>
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<title><function>preg_grep</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// return all array elements
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// containing floating point numbers
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$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
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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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</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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