- var_dump: documentation ( source)
- base_convert: documentation ( source)
- printf: documentation ( source)
<?php
$a = 0x80;
var_dump(base_convert(0x80,16,10));
$converted_a = base_convert($a, 16, 2);
var_dump($converted_a);
$b = ~$a; // -$a -1 or -297
$converted_b = base_convert($b, 16, 2);
printf("\n%d", $converted_b);
echo "\n";