3v4l.org

run code in 200+ PHP versions simultaneously
<?php // An example callback function function my_callback_function() { echo 'hello world!', PHP_EOL; } // Callback methods in classes class ParentClass { static function myCallbackMethod() { echo 'Hello Parent!', PHP_EOL; } } class MyClass extends ParentClass { static function myCallbackMethod() { echo 'Hello Child!', PHP_EOL; } } class Invokable { public function __invoke() { echo 'Hello Invokable', PHP_EOL; } } $obj = new MyClass(); $invokable = new Invokable(); $callbacks = array( 'type1' => 'my_callback_function', 'type2' => array('MyClass', 'myCallbackMethod'), 'type3' => array($obj, 'myCallbackMethod'), 'type6' => $invokable, 'type7' => function() { echo 'Hello Closure', PHP_EOL; }, 'type4' => 'MyClass::myCallbackMethod', 'type5' => array('MyClass', 'parent::myCallbackMethod'), ); foreach( $callbacks as $key => $callback ) { echo PHP_EOL, 'Testing ', $key, PHP_EOL; var_dump(is_callable()); call_user_func($callback); try { $callback(); } catch( Error $e ) { echo $e->getMessage(), PHP_EOL; } }
based on VfmVa
Output for 7.0.0 - 7.4.1
Testing type1 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL hello world! hello world! Testing type2 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Hello Child! Testing type3 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Hello Child! Testing type6 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Invokable Hello Invokable Testing type7 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Closure Hello Closure Testing type4 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Hello Child! Testing type5 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Parent! Call to undefined method MyClass::parent::myCallbackMethod()
Output for 5.4.0 - 5.6.40
Testing type1 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL hello world! hello world! Testing type2 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Hello Child! Testing type3 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Hello Child! Testing type6 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Invokable Hello Invokable Testing type7 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Closure Hello Closure Testing type4 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Fatal error: Call to undefined function MyClass::myCallbackMethod() in /in/CrEev on line 45
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Testing type1 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL hello world! hello world! Testing type2 Warning: is_callable() expects at least 1 parameter, 0 given in /in/CrEev on line 42 NULL Hello Child! Fatal error: Function name must be a string in /in/CrEev on line 45
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/CrEev on line 35
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/CrEev on line 35
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STATIC, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/CrEev on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STATIC, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/CrEev on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/CrEev on line 10
Process exited with code 255.