Online PHP editor | output for jgCmF

<?php function getPatientCodeDisplay($id='') { $retstr = ""; if(intval($id)>0) { $max_id_length = 5; $id_length = strlen($id); if($id_length <= $max_id_length) { $prefix_code = "AHD"."1"; $final_len = $max_id_length+strlen($prefix_code)-$id_length; $retstr = str_pad($prefix_code, $final_len, "0", STR_PAD_RIGHT); $retstr .= $id; } } return $retstr; } echo getPatientCodeDisplay("5").">>>>>>"; echo getPatientCodeDisplay("10").">>>>>>"; echo getPatientCodeDisplay("111").">>>>>>"; echo getPatientCodeDisplay("1111").">>>>>>"; echo getPatientCodeDisplay("11111").">>>>>>"; echo getPatientCodeDisplay("21111").">>>>>>";