Switch by class (instanceof) in PHP

Question

It is possible to replace block of if( .. instanceof ...), elseif(... instanceof ...), ... with switch?

For example:

<?php $class = ..... //some class  if($class instanceof SomeClass) {     //do something } elseif($class instanceof SomeAnotherClass) {     //do something else } 

Answer 1

For a polymorphic switch with instanceof which considers inheritance:

switch(true) {       case $objectToTest instanceof TreeRequest:         echo "tree request";         break;     case $objectToTest instanceof GroundRequest:         echo "ground request";         break; } 

For a switch where the class name should match exactly:

$class = get_class($objectToTest);  switch($class) {       case 'TreeRequest':         echo "tree request";         break;     case 'GroundRequest':         echo "ground request";         break; } 

Answer 2

The following is more correct:

$class = get_class($objectToTest);  switch($class) {       case TreeRequest::class:         echo "tree request";         break;     case GroundRequest::class:         echo "ground request";         break; } 

This way namespaces are properly compared (you don't have to type them out) and if anything changes such as the namespace or class name you'll get a decent IDE error informing you that your code is broken.