note 67911 deleted from function.array-key-exists by felipe

Note Submitter: marzetti.marco at gmail.com 

----

Returns the keys in $arr matching $pattern in a regex

<?php

function regex_array_keys ( &$arr, $pattern ) {
	$results[] = false;
	if( !is_array( $arr ) )
		return false;
	
	while( !is_null( $key = key( $arr ) ) ) {
		
		if( preg_match( $pattern, $key ) )
			$results[] = $key;
		next($arr);
	}
	reset( $arr );
	

	return $results;
}

?>