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<?php class MyClass { private $privateProperty; public function setPrivateProperty($prop) { $this->privateProperty = $prop; return $this; } public function evaluate(MyClass1 $object) { // this works, because visibility is checked on class name, not on concrete instance! var_dump($object->privateProperty); } } class MyClass1 { private $privateProperty; public function setPrivateProperty($prop) { $this->privateProperty = $prop; return $this; } } $obj1 = (new MyClass)->setPrivateProperty('foo'); $obj2 = (new MyClass1)->setPrivateProperty('bar'); $obj1->evaluate($obj2);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Cannot access private property MyClass1::$privateProperty in /in/9I0XB:15 Stack trace: #0 /in/9I0XB(34): MyClass->evaluate(Object(MyClass1)) #1 {main} thrown in /in/9I0XB on line 15
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Fatal error: Cannot access private property MyClass1::$privateProperty in /in/9I0XB on line 15
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/9I0XB on line 31
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/9I0XB on line 31
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/9I0XB on line 4
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/9I0XB on line 4
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/9I0XB on line 4
Process exited with code 255.

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