3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump($timeoutLeft ?: null);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined variable $timeoutLeft in /in/VsrjB on line 3 NULL
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: timeoutLeft in /in/VsrjB on line 3 NULL
Output for 7.3.32 - 7.3.33
NULL

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173.91 ms | 401 KiB | 200 Q