3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = new stdClass; $bar = new stdClass; $bar->x = "foobar"; $foo->bar = $bar; var_dump($foo->bar->x ?? "1"); var_dump($foo->bar->x->y ?? "2"); var_dump($foo->x->bar ?? "3");
Output for 7.0.0 - 7.0.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
string(6) "foobar" string(1) "2" string(1) "3"
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/7k2R8 on line 8
Process exited with code 255.
preferences:
98.72 ms | 1938 KiB | 4 Q