3v4l.org

run code in 300+ PHP versions simultaneously
<?php setup: $foo = '0'; act: $foo++; assert: var_dump($foo === 1);
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 8.0.0 - 8.0.12, 8.1rc1 - rc3
bool(true)

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32.48 ms | 460 KiB | 5 Q