3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a="hello"; echo $a[-1];
Output for 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
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preferences:
51.74 ms | 730 KiB | 4 Q