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run code in 150+ php & hhvm versions
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<?php function foo(array &$foo) { $foo[] = 2; } $a = array(1); call_user_func_array('foo', array(&$a)); var_dump($a);
Output for 5.1.0 - 7.1.0
array(2) { [0]=> int(1) [1]=> int(2) }
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/5OIg3 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/5OIg3 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/5OIg3 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/5OIg3 on line 3
Process exited with code 255.