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<?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(); $a->makeString();
Output for 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught TypeError: Cannot assign string to reference held by property A::$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.
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 'array' (T_ARRAY), expecting variable (T_VARIABLE) in /in/nG734 on line 8
Process exited with code 255.

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