<?php
function takeRef(&$foo) {
$foo = "this is a string now";
}
class A {
private array $data = [42, 23];
public function makeString() {
takeRef($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 array in /in/nG734:4
Stack trace:
#0 /in/nG734(10): takeRef(Array)
#1 /in/nG734(15): A->makeString()
#2 {main}
thrown in /in/nG734 on line 4
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Fatal error: Uncaught TypeError: Cannot assign string to reference held by property A::$data of type array in /in/nG734:4
Stack trace:
#0 /in/nG734(10): takeRef(Array)
#1 /in/nG734(15): A->makeString()
#2 {main}
thrown in /in/nG734 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 'array' (T_ARRAY), expecting function (T_FUNCTION) or const (T_CONST) in /in/nG734 on line 8
Process exited with code 255.