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<?php class C { static function s(&$x) { $x = 2; } } $v = "C::s"; $x = 1; call_user_func($v, $x); echo $x;
Output for 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
Warning: C::s(): Argument #1 ($x) must be passed by reference, value given in /in/PbM0Z on line 7 1
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.27
Warning: Parameter 1 to C::s() expected to be a reference, value given in /in/PbM0Z on line 7 1
Output for 5.2.2 - 5.2.17
1
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.1
Warning: call_user_func(C::s): Unable to call C::s(1) in /in/PbM0Z on line 7 1
Output for 5.0.0 - 5.0.5
Warning: call_user_func(C::s): First argument is expected to be a valid callback in /in/PbM0Z on line 7 1
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/PbM0Z on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STATIC, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/PbM0Z on line 3
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/PbM0Z on line 3
Process exited with code 255.

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