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<?php Class A { public function __call($method, $args){ $test = & current($args); call_user_func_array([$this, 'test'], $args); } protected function test(&$data) { $data = "done"; } } $data = 42; $a = new A(); $a->test($data); var_dump($data); die();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Notice: Only variables should be assigned by reference in /in/tDP0l on line 7 Warning: A::test(): Argument #1 ($data) must be passed by reference, value given in /in/tDP0l on line 8 int(42)
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Only variables should be assigned by reference in /in/tDP0l on line 7 Warning: Parameter 1 to A::test() expected to be a reference, value given in /in/tDP0l on line 8 int(42)
Output for 7.3.32 - 7.3.33
Warning: Parameter 1 to A::test() expected to be a reference, value given in /in/tDP0l on line 8 int(42)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Strict Standards: Only variables should be assigned by reference in /in/tDP0l on line 7 Warning: Parameter 1 to A::test() expected to be a reference, value given in /in/tDP0l on line 8 int(42)

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