3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 0x80; var_dump(base_convert($a, 16, 2),$a); printf("%b",$a); echo "\n\n"; $b = -$a; var_dump(base_convert($b, 16, 2), $b); printf("%b", $b); echo "\n"; $c = 100; $d = ~$c; var_dump($c,$d); echo $c + $d; echo "\n\n"; $a = 0x80; var_dump($a,base_convert($a, 16, 2));
Output for 4.3.0 - 7.1.0
string(9) "100101000" int(128) 10000000 string(9) "100101000" int(-128) 1111111111111111111111111111111111111111111111111111111110000000 int(100) int(-101) -1 int(128) string(9) "100101000"