save.php

<?php
class PseudoCrypt {
 
	/* Next prime greater than 62 ^ n / 1.618033988749894848 */
	private static $golden_primes = array(
		1,41,2377,147299,9132313,566201239,35104476161,2176477521929
	);
 
	/* Ascii :                    0  9,         A  Z,         a  z     */
	/* $chars = array_merge(range(48,57), range(65,90), range(97,122)) */
	private static $chars = array(
		0=>48,1=>49,2=>50,3=>51,4=>52,5=>53,6=>54,7=>55,8=>56,9=>57,10=>65,
		11=>66,12=>67,13=>68,14=>69,15=>70,16=>71,17=>72,18=>73,19=>74,20=>75,
		21=>76,22=>77,23=>78,24=>79,25=>80,26=>81,27=>82,28=>83,29=>84,30=>85,
		31=>86,32=>87,33=>88,34=>89,35=>90,36=>97,37=>98,38=>99,39=>100,40=>101,
		41=>102,42=>103,43=>104,44=>105,45=>106,46=>107,47=>108,48=>109,49=>110,
		50=>111,51=>112,52=>113,53=>114,54=>115,55=>116,56=>117,57=>118,58=>119,
		59=>120,60=>121,61=>122
	);
 
	public static function base62($int) {
		$key = "";
		while($int > 0) {
			$mod = $int-(floor($int/62)*62);
			$key .= chr(self::$chars[$mod]);
			$int = floor($int/62);
		}
		return strrev($key);
	}
 
	public static function udihash($num, $len = 5) {
		$ceil = pow(62, $len);
		$prime = self::$golden_primes[$len];
		$dec = ($num * $prime)-floor($num * $prime/$ceil)*$ceil;
		$hash = self::base62($dec);
		return str_pad($hash, $len, "0", STR_PAD_LEFT);
	}
 
}

if ($_POST) {
$db_host = 'mysql.bubblemix.net';
$db_user = 'jsonws';
$db_pwd = 'qwe123';

$database = 'jsonws';

if (!mysql_connect($db_host, $db_user, $db_pwd)) die("Can't connect to database");

if (!mysql_select_db($database)) die("Can't select database");

$sql = "INSERT INTO webservices (json, ip) VALUES ('".$_POST["json"]."', '" . $_SERVER["REMOTE_ADDR"] . "')";
mysql_query($sql);

$newid = mysql_insert_id();
$hash = PseudoCrypt::udihash($newid);

$sql = "UPDATE webservices SET hash='$hash' WHERE id=$newid";
mysql_query($sql);
echo $hash;
} else {
?>

<form method="post">
<input type="text" name="json" />
<input type="submit" value="post" />
</form>

<?
}
?>