3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public static $a_static1 = "1"; public static $a_static2 = "2"; } var_dump(Foo::$a_static1 ?? Foo::$a_static2);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "1"
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/rlFLZ on line 8
Process exited with code 255.
preferences:
164.34 ms | 402 KiB | 229 Q