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run code in 300+ PHP versions simultaneously
<?php function f(?int $x = null) { echo $x ? 'Present' . $x : 'Not present'; } f(); echo PHP_EOL; f(1);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 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
Not present Present1
preferences:
145.56 ms | 407 KiB | 5 Q