3v4l.org

run code in 300+ PHP versions simultaneously
<?php class ClassName { public function foo(): ?self { return new ClassName(); } public function bar(): ?self { return null; } } $instance = new ClassName(); $instance->foo(); $instance->bar();
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Output for 7.0.0 - 7.0.33
Parse error: syntax error, unexpected '?' in /in/WLnQs on line 5
Process exited with code 255.
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/WLnQs on line 5
Process exited with code 255.
preferences:
72.16 ms | 408 KiB | 5 Q