note 117907 added to language.oop5.typehinting

i think this is pretty close. $lines=hhb_mustbe('array',file("foofile")); //either file succeeds, and returns an array, or file returns FALSE which is not an array, which throws an unexpectedValueException. $socket=hhb_mustbe('Socket',socket_create(AF_INET,SOCK_STREAM,getprotobyname('tcp'))); //either socket_create succeeds, and returns a Socket, or socket_create returns False, which is not a resource of type Socket, and you get an UnexpectedValueException $size=hhb_mustbe('int',filesize(somefile)); //either filesize() returns an integer, or returns FALSE wich is not an int, and you'll get UnexpectedValueException. function hhb_mustbe(/*string*/$type,/*mixed*/$variable){ //should it be UnexpectedValueException or InvalidArgumentException? //going with UnexpectedValueException for now... $actual_type=gettype($variable); if($actual_type==='unknown type'){ //i dont know how this can happen, but it is documented as a possible return value of gettype... throw new Exception('could not determine the type of the variable!'); } if($actual_type==='object'){ if(!is_a($variable,$type)){ $dbg=get_class($variable); throw new UnexpectedValueException('variable is an object which does NOT implement class: '.$type.'. it is of class: '.$dbg); } return $variable; } if($actual_type==='resource'){ $dbg=get_resource_type($variable); if($dbg!==$type){ throw new UnexpectedValueException('variable is a resource, which is NOT of type: '.$type.'. it is of type: '.$dbg); } return $variable; } //now a few special cases if($type==='bool'){ $parsed_type='boolean'; } else if($type==='int'){ $parsed_type='integer'; } else if($type==='float'){ $parsed_type='double'; } else if($type==='null'){ $parsed_type='NULL'; } else{ $parsed_type=$type; } if($parsed_type!==$actual_type && $type!==$actual_type){ throw new UnexpectedValueException('variable is NOT of type: '.$type.'. it is of type: '.$actual_type); } //ok, variable passed all tests. return $variable; } ---- Server IP: 72.52.91.14 Probable Submitter: 85.164.166.109 ---- Manual Page -- http://php.net/manual/en/language.oop5.typehinting.php Edit -- https://master.php.net/note/edit/117907 Del: integrated -- https://master.php.net/note/delete/117907/integrated Del: useless -- https://master.php.net/note/delete/117907/useless Del: bad code -- https://master.php.net/note/delete/117907/bad+code Del: spam -- https://master.php.net/note/delete/117907/spam Del: non-english -- https://master.php.net/note/delete/117907/non-english Del: in docs -- https://master.php.net/note/delete/117907/in+docs Del: other reasons-- https://master.php.net/note/delete/117907 Reject -- https://master.php.net/note/reject/117907 Search -- https://master.php.net/manage/user-notes.php