<?php
// Unicode/multibyte capable equivelant of ord().
function charCodeAt($a, $b) {
$a = mb_convert_encoding($a,"UCS-4BE","UTF-8");
$c = unpack("N", mb_substr($a,$b,1,"UCS-4BE"));
return $c[1];
}
// strToNum - Convert a string into a 32-bit integer.
function strToNum ($str, $c, $k) {
$int32unit = 4294967296; // 2^32
for ($i=0; $i<strlen($str); $i++) {
$c *= $k;
if ($c >= $int32unit) {
$c = ($c - $int32unit * (int)($c / $int32unit));
if (PHP_INT_MAX != 0x0000000080000000) { // 2147483647
$c = -(~($c & 0x00000000FFFFFFFF) + 1);
}
// if $c is less than -2^31
$c = ($c < 0x0000000080000000) ? ($c + $int32unit) : $c;
}
$c += charCodeAt($str, $i);
} return $c;
}
function string_inthash($str)
{
$a = (int)preg_replace('#[^0-9]#u', '', sha1($str)) * (int)date('YmdHis');
if (PHP_INT_MAX != 0x0000000080000000) { // 2147483647
$a = -(~($a & 0x00000000FFFFFFFF) + 1);
}
return (int)$a;
}
$str = 'secret';
echo strToNum($str, 0x1505, 0x21);
/*
$a = date('YmdHi');
$b = 'secret';
$bb = sha1($b);
$bc = preg_replace('#[^0-9]#u', '', $bb);
$bd = (int)$bc - (int)$a;
$c = "{$b}|{$a}";
$d = base64_encode($c);
$e = base64_decode($d);
echo $a . PHP_EOL;
echo $b . PHP_EOL;
echo $bb . PHP_EOL;
echo $bc . PHP_EOL;
echo $bd . PHP_EOL;
echo $c . PHP_EOL;
echo $d . PHP_EOL;
echo $e . PHP_EOL;
*/
preferences:
38.22 ms | 402 KiB | 5 Q