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<?php class Foo { public function __construct() { call_user_func(array('Bar', 'testEcho')); } } class Bar { private function testEcho() { echo 'test'; } } $d = new Foo();
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, non-static method Bar::testEcho() cannot be called statically in /in/VfP86:6 Stack trace: #0 /in/VfP86(16): Foo->__construct() #1 {main} thrown in /in/VfP86 on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($function) must be a valid callback, non-static method Bar::testEcho() cannot be called statically in /in/VfP86:6 Stack trace: #0 /in/VfP86(16): Foo->__construct() #1 {main} thrown in /in/VfP86 on line 6
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: call_user_func() expects parameter 1 to be a valid callback, cannot access private method Bar::testEcho() in /in/VfP86 on line 6
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