3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = INF; $n = pow(2,64); echo $a - ($n * ( (int) ($a/$n) ) ),"\n"; echo fmod(INF,pow(2,64)),"\n"; echo INF % pow(2,64);

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45.25 ms | 402 KiB | 5 Q