3v4l.org

run code in 500+ PHP versions simultaneously
<?php interface StreamInterface { public function __toString(): string; public function foo(): string; } class X implements StreamInterface { public function __toString() { return 'x'; } public function foo(): string { // fatal error with line below // public function foo() { return 'x'; } }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11

preferences:
31.22 ms | 1136 KiB | 7 Q