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<?php function call($o, $a, $r, $context) { return call_user_func_array($o, $a); } class A { protected $a = 5; protected function dd() { return 'protected'; } public function __invoke() { $f = function () { return $this->a; }; //return call($f, array(), array(), isset($this) ? $this : null); return call(array($this, 'dd'), array(), array(), isset($this) ? $this : null); } } $a = new A; var_dump($a());
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, cannot access protected method A::dd() in /in/fPJnb:4 Stack trace: #0 /in/fPJnb(21): call(Array, Array, Array, Object(A)) #1 /in/fPJnb(26): A->__invoke() #2 {main} thrown in /in/fPJnb on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($function) must be a valid callback, cannot access protected method A::dd() in /in/fPJnb:4 Stack trace: #0 /in/fPJnb(21): call(Array, Array, Array, Object(A)) #1 /in/fPJnb(26): A->__invoke() #2 {main} thrown in /in/fPJnb on line 4
Process exited with code 255.
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 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot access protected method A::dd() in /in/fPJnb on line 4 NULL
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/fPJnb on line 17
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/fPJnb on line 17
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fPJnb on line 9
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_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/fPJnb on line 9
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/fPJnb on line 9
Process exited with code 255.
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