» google_pagerank()
  » preg_replace()
  » imagecreatefrompng()
  » site_pageranks()
  » imagepng()
  » imagedestroy()
  » imagestring()
  » imagecolorallocate()
  » htmlentities()
  » fopen()
  » preg_match()
  » header()
  » getimagesize()
  » htmlspecialchars()
  » session_start()
  » ob_start()
  » strstr()
  » ob_flush()
  » preg_match_all()
  » strpos()
  » flush()
  » setcookie()
  » str_replace()
  » array2vars()
  » nl2br()
  » preg_split()
  » ereg()
  » urlencode()
  » ereg_replace()
  » readgzfile()

Become a sponsor for $15/month. Link is sitewide - PR5 homepage, 20+ PR4 pages, 90+ PR3 pages. Email dave[AT]icemelon[D0T]c0m.

(PHP 4, PHP 5)

preg_grep --  Return array entries that match the pattern

Description

array preg_grep ( string pattern, array input [, int flags] )

preg_grep() returns the array consisting of the elements of the input array that match the given pattern .

flags can be the following flag:

PREG_GREP_INVERT

If this flag is passed, preg_grep() returns the elements of the input array that do not match the given pattern . This flag is available since PHP 4.2.0.

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

Example 1. preg_grep() example

<?php
// return all array elements
// containing floating point numbers
$fl_array = preg_grep("/^(\d+)?\.\d+$/", $array);
?>

Related Function(s)

array_values()