3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 65; $b = ~$a + 1; // get 2s complement echo $b,"\n"; printf("0x%x\n\n",$b); $c = base_convert($b,10,2); echo $c,"\n"; $i = intval($c,2); echo $i;

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60.12 ms | 402 KiB | 5 Q