3v4l.org

run code in 500+ PHP versions simultaneously
<?php $tests = [1, 999, 1000, 50001, 100000, 2999]; foreach ($tests as $test) { $upper = intval(($test - 1) / 1000) * 1000 + 1000; echo "$test is between " . ($upper - 999) . " and $upper\n"; }
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
1 is between 1 and 1000 999 is between 1 and 1000 1000 is between 1 and 1000 50001 is between 50001 and 51000 100000 is between 99001 and 100000 2999 is between 2001 and 3000
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104.63 ms | 1409 KiB | 4 Q