3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo(Callable $a = NULL) { var_dump($a); } foo('var_dump'); foo(NULL);
based on 7hB4e
Output for 5.4.0 - 7.1.0
string(8) "var_dump" NULL
Output for 5.2.0 - 5.3.29
Catchable fatal error: Argument 1 passed to foo() must be an instance of Callable, string given, called in /in/ArfG2 on line 6 and defined in /in/ArfG2 on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Argument 1 passed to foo() must be an object of class Callable, called in /in/ArfG2 on line 6 and defined in /in/ArfG2 on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 1 must be an object of class Callable in /in/ArfG2 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/ArfG2 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/ArfG2 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/ArfG2 on line 2
Process exited with code 255.