3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo(array &$callbackArgs = []) {} foo($bar); var_dump($bar);
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be of the type array, null given, called in /in/SW6vW on line 5 and defined in /in/SW6vW:3 Stack trace: #0 /in/SW6vW(5): foo(NULL) #1 {main} thrown in /in/SW6vW on line 3
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
Catchable fatal error: Argument 1 passed to foo() must be an instance of array, null given in /in/SW6vW on line 3
Process exited with code 255.
Output for 5.4.0 - 5.6.28
Catchable fatal error: Argument 1 passed to foo() must be of the type array, null given, called in /in/SW6vW on line 5 and defined in /in/SW6vW on line 3
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/SW6vW on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/SW6vW on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/SW6vW on line 3
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_ARRAY, expecting ')' in /in/SW6vW on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/SW6vW on line 3
Process exited with code 255.