Hello, I'm looking for a function in PHP

Hey, I'm not sure where to mail this question, so I mail it to You. I'm looking for a function in php, who sets the index og an array. Something like this: array_set_index( $index, $array ); I think, I spent almost an hour looking after this function at php.net, Now I give up and write the function myself. But I hope this function are i php or You will add it. Best regards & and thanks for php4, it's my favorite web-programing language Hans Kejser Hansen