- var_dump: documentation ( source)
- base_convert: documentation ( source)
- hexdec: documentation ( source)
- printf: documentation ( source)
<?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") );