3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public static int $number = 5; } $num = &A::$number; $num = "String";
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Uncaught TypeError: Cannot assign string to reference held by property A::$number of type int in /in/XC6hk:9 Stack trace: #0 {main} thrown in /in/XC6hk on line 9
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected 'int' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/XC6hk on line 5
Process exited with code 255.

preferences:
145.03 ms | 407 KiB | 5 Q