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<?php function takeRef(&$foo) { $foo = "this is a string now"; } class A { private int $data = 42; public function makeString() { takeRef($this->data); var_dump($this->data); } } $a = new A(); $a->makeString();
Output for 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: Cannot assign string to reference held by property A::$data of type int in /in/kl5e2:4 Stack trace: #0 /in/kl5e2(10): takeRef(42) #1 /in/kl5e2(15): A->makeString() #2 {main} thrown in /in/kl5e2 on line 4
Process exited with code 255.
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33
Parse error: syntax error, unexpected 'int' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/kl5e2 on line 8
Process exited with code 255.
Output for 5.5.0 - 5.5.33, 5.6.0 - 5.6.19, 7.0.0 - 7.0.4
Parse error: syntax error, unexpected 'int' (T_STRING), expecting variable (T_VARIABLE) in /in/kl5e2 on line 8
Process exited with code 255.

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