array preg_grep ( string pattern, arrayinput [, int $flags] );

<?php
   foods = array("pasta", "steak", "fish", "potatoes");

   // find elements beginning with "p", followed by one or more letters.p_foods = preg_grep("/p(\w+)/", foods);

   print "Found food is " .p_foods[0];
   print "Found food is " . $p_foods[1];
?>

Found food is pastaFound food is