<?php
function gdr_encode($val) {
$bin = '';
while ($val > 0) {
$bin .= chr($val & 0xFF);
$val >>= 8;
}
return str_replace(array('/', '='), array('_', ''), base64_encode($bin));
}
function gdr_decode($str) {
$bin = base64_decode(str_replace('_', '/', $str));
$val = 0;
for ($i=strlen($bin)-1; $i>=0; $i--) {
$val |= ord($bin[$i]) << $i*8;
}
return $val;
}
if (!function_exists('json_encode')) { die('json_encode missing'); }
$vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 999999, 1000000, 4294967295, 4294967296);
foreach ($vals as $val) {
$enc = json_encode(gdr_encode($val));
$dec = json_encode(gdr_decode($enc));
$val = json_encode($val);
echo "$enc $val\n";
}
preferences:
36.9 ms | 402 KiB | 5 Q