3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "0x80" + 0; var_dump(base_convert($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)); var_dump( hexdec("0x80") );
Output for 7.1.0
Notice: A non well formed numeric value encountered in /in/GvWS0 on line 2 string(1) "0" int(0) 0 string(1) "0" int(0) 0 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)
Output for 7.0.0 - 7.0.14
string(1) "0" int(0) 0 string(1) "0" int(0) 0 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)
Output for 4.3.0 - 5.6.28
string(9) "100101000" int(128) 10000000 string(9) "100101000" int(-128) 1111111111111111111111111111111111111111111111111111111110000000 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)