List of PHP functions:
sha1(), strlen(), ord(), substr(), strrev(), base_convert(), dechex(), hexdec() and  chr()

Example of encode and decode using PHP

<?php

function encode($string,$key) {
  $key = sha1($key);
  $strLen = strlen($string);
  $keyLen = strlen($key);
  for ($x = 0; $x < $strLen; $x++) {
    $ordStr = ord(substr($string,$x,1));
    if ($y == $keyLen) { $y = 0; }
    $ordKey = ord(substr($key,$y,1));
    $y++;
    $hash .= strrev(base_convert(dechex($ordStr + $ordKey),16,36));
  }
...

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List of PHP functions:
defined(), define(), require_once(), mysql_connect(), mysql_select_db(), mysql_query(), mysql_fetch_array(), mysql_close(), mysql_error(), isset(), unset() and die()

First create a config file for database contants. Save this as config.php.
<?php
// Database Constants
defined('DB_SERVER') ? null : define("DB_SERVER", "localhost");
defined('DB_USER')   ? null : define("DB_USER", "root");
defined('DB_PASS')   ? null : define("DB_PASS", "pass");
defined('DB_NAME')   ? null : define("DB_NAME", "mydatabase");
?>
The next step is to create...

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