3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo(callable $callback = null) { var_dump($callback); } foo(); foo(null); foo(42);
based on kRQbf
Output for 7.1.0
NULL NULL Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be callable or null, integer given, called in /in/bP0iA on line 8 and defined in /in/bP0iA:2 Stack trace: #0 /in/bP0iA(8): foo(42) #1 {main} thrown in /in/bP0iA on line 2
Process exited with code 255.
Output for 7.0.0 - 7.0.14
NULL NULL Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be callable, integer given, called in /in/bP0iA on line 8 and defined in /in/bP0iA:2 Stack trace: #0 /in/bP0iA(8): foo(42) #1 {main} thrown in /in/bP0iA on line 2
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
NULL NULL Catchable fatal error: Argument 1 passed to foo() must be an instance of callable, int given in /in/bP0iA on line 4
Process exited with code 255.
Output for 5.4.0 - 5.6.28
NULL NULL Catchable fatal error: Argument 1 passed to foo() must be callable, integer given, called in /in/bP0iA on line 8 and defined in /in/bP0iA on line 2
Process exited with code 255.
Output for 5.2.0 - 5.3.29
NULL NULL Catchable fatal error: Argument 1 passed to foo() must be an instance of callable, integer given, called in /in/bP0iA on line 8 and defined in /in/bP0iA on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6
NULL NULL Fatal error: Argument 1 passed to foo() must be an object of class callable, called in /in/bP0iA on line 8 and defined in /in/bP0iA on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 1 must not be null in /in/bP0iA on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/bP0iA on line 2
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_STRING, expecting ')' in /in/bP0iA on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/bP0iA on line 2
Process exited with code 255.