3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); function a(array|bool $a = null) { var_dump($a); } a();
Output for 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Deprecated: a(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/ZfBoo on line 5 NULL
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30
NULL
Output for 7.4.0 - 7.4.33
Parse error: syntax error, unexpected '|', expecting variable (T_VARIABLE) in /in/ZfBoo on line 5
Process exited with code 255.
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