<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.2 $ -->
<!-- splitted from ./en/functions/pcre.xml, last change in rev 1.2 -->
  <refentry id="function.preg-grep">
   <refnamediv>
    <refname>preg_grep</refname>
    <refpurpose>
     Return array entries that match the pattern
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>array</type><methodname>preg_grep</methodname>
      <methodparam><type>string</type><parameter>pattern</parameter></methodparam>
      <methodparam><type>array</type><parameter>input</parameter></methodparam>
     </methodsynopsis>

    <para>
     <function>preg_grep</function> returns the array consisting of
     the elements of the <parameter>input</parameter> array that match
     the given <parameter>pattern</parameter>.
    </para>

    <para>
     Since PHP 4.0.4, the results returned by <function>preg_grep</function>
     are indexed using the keys from the input array. If this behavior is
     undesirable, use <function>array_values</function> on the array returned by
     <function>preg_grep</function> to reindex the values.
    </para>

    <para>
     <example>
      <title><function>preg_grep</function> example</title>
      <programlisting role="php">
<![CDATA[
// return all array elements
// containing floating point numbers
$fl_array = preg_grep ("/^(\d+)?\.\d+$/", $array);
]]>
      </programlisting>
     </example>
    </para>
   </refsect1>
  </refentry>

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