3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { public ?int $var; } $a = new A(); var_dump(isset($a->var));
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
bool(false)
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '?', expecting function (T_FUNCTION) or const (T_CONST) in /in/MK4gN on line 3
Process exited with code 255.
preferences:
83.8 ms | 407 KiB | 5 Q