<?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();
$a->makeString();
Fatal error: Uncaught TypeError: Cannot assign string to reference held by property A::$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.