新聞財經娛樂♬資訊 News Economy

<?php // RAY_cookie_safety.phperror_reporting(E_ALL);// DEMONSTRATE HOW TO ENCODE INFORMATION IN A COOKIE// TO REDUCE THE RISK OF COOKIE TAMPERING// A DATA DELIMITER$dlm = '|';// YOUR OWN SECRET CODE$secret_code = 'MY SECRET';// A DATA STRING THAT WE WANT TO STORE (MIGHT BE A DB KEY)$cookie_value = 'MARY HAD A LITTLE LAMB';// ENCODE THE DATA STRING TOGETHER WITH OUR SECRET$cookie_code = md5($cookie_value . $secret_code);// CONSTRUCT THE COOKIE STRING WITH THE CLEAR TEXT AND THE CODED STRING$safe_cookie_value = $cookie_value . $dlm . $cookie_code;// SET THE COOKIE LIKE "MARY HAD A LITTLE LAMB|cf783c37f18d007d23483b11759ec181"setcookie('safe_cookie', $safe_cookie_value);// WHEN STORED, THE COOKIE WILL BE URL-ENCODED SO IT WILL LOOK SOMETHING LIKE THIS ON THE BROWSER// MARY+HAD+A+LITTLE+LAMB%7Ccf783c37f18d007d23483b11759ec181// IT WILL BE URL-DECODED BEFORE IT IS PRESENTED TO PHP// HOW TO TEST THE COOKIEif (isset($_COOKIE["safe_cookie"])){    // BREAK THE COOKIE VALUE APART AT THE DELIMITER    $array = explode($dlm, $_COOKIE["safe_cookie"]);    // ENCODE THE DATA STRING TOGETHER WITH YOUR SECRET    $cookie_test = md5($array[0] . $secret_code);    // IF THE MD5 CODES DO NOT MATCH, THE COOKIE IS NO LONGER INTACT    if ($cookie_test == $array[1])    {        echo "<br/>THE COOKIE {$_COOKIE["safe_cookie"]} IS INTACT";    }    else    {        echo "<br/>THE COOKIE {$_COOKIE["safe_cookie"]} IS CORRUPT";    }}else{    die('COOKIE IS SET - REFRESH THE BROWSER WINDOW NOW');}// MUNG THE COOKIE TO DEMONSTRATE WHAT HAPPENS WITH A CORRUPT COOKIE$_COOKIE["safe_cookie"] = str_replace('MARY', 'FRED', $_COOKIE["safe_cookie"]);// HOW TO TEST THE COOKIEif (isset($_COOKIE["safe_cookie"])){    // BREAK THE COOKIE VALUE APART AT THE DELIMITER    $array = explode($dlm, $_COOKIE["safe_cookie"]);    // ENCODE THE DATA STRING TOGETHER WITH OUT SECRET    $cookie_test = md5($array[0] . $secret_code);    // IF THE MD5 CODES DO NOT MATCH, THE COOKIE IS NO LONGER INTACT    if ($cookie_test == $array[1])    {        echo "<br/>THE COOKIE {$_COOKIE["safe_cookie"]} IS INTACT";    }    else    {        echo"<br/>THE COOKIE {$_COOKIE["safe_cookie"]} IS CORRUPT";    }}                                          

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