3v4l.org

run code in 500+ PHP versions simultaneously
<?php class x { private $p = 'Yes!'; function foo() { // valid code echo $this->$this; } function __toString() { return 'p'; } } (new x)->foo();
Output for 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
Yes!
preferences:
45.72 ms | 879 KiB | 4 Q