Online PHP editor | output for HZ58e

<?php function mysweetcode($argument){ $required=['first'];//specify required parameters here $default=['first'=>0,'second'=>1,'third'=>2];//define all parameters with their default values here $missing=[]; if(!is_array($argument)) return false; $argument=array_intersect_key($argument,$default); foreach($required as $k=>$v){//check for missing required parameters if(!isset($argument[$v])) $missing[]=$v; } if(!empty($missing)){// if required are missing trigger or throw error according to the PHP version $cm=count($missing); if (version_compare(PHP_VERSION, '7.0.0') < 0) { trigger_error(call_user_func_array('sprintf', array_merge(array('Required '.(($cm>1)?'parameters:':'parameter:'). str_repeat('%s,',$cm).(($cm>1)?' are':' is').' missing'),$missing)), E_USER_ERROR); }else{ throw new Error(call_user_func_array('sprintf',array_merge( array('Required '.(($cm>1)?'parameters:':'parameter:'). str_repeat('%s',$cm).(($cm>1)?' are':' is').' missing'),$missing))); } } $default=array_merge($default,$argument);//assign given values to parameters extract($default);/*extract the parameters to allow further checking and other operations in the function or method*/ unset($required,$missing,$argument,$default,$k,$v);//gain some space //then you can use $first,$second,$third in your code return $first+$second+$third; } var_dump(mysweetcode(['first'=>9,'third'=>8])); var_dump(mysweetcode(['third'=>8]));