md5 key

Sometimes we don't want to, a web address for people to see, the simple way is to encrypt it into a string of characters, the function is as follows: function Encrypt ($key, $plain _text) {$plain _text = Trim ($plain _text);$IV = substr (MD5 ($key),

Ask the php experts to see the principles of this encryption algorithm PHPcodefunctionsys_auth ($ str, $ actionencode, $ key) {$ keymd5 ($ key); $ str $ actionencode? $ Str: base64_decode ($ str); search for a php expert and check the principles of

Two simple PHP decryption and decryption codes: www.phper.org.cn? The postencryption algorithm is as follows: functionencrypt ($ data, $ key) {$ keymd5 ($ key); $ x0; $ lenstrlen ($ data); $ lstrlen ($ key ); for ($ I two simple PHP decryption and

Many times we need to encrypt and decrypt data, such as some data that needs to be saved to a cookie, but not easily accessible by the user, and we need to encrypt the data to be stored in a cookie, and then decrypt it when we need to use it. The

In many cases, we need to encrypt and decrypt data. For example, some data needs to be stored in cookies, but it cannot be easily obtained by users, in this case, we need to encrypt the data and save it to the cookie, and decrypt it when we need to

PHP des encryption:$cipher _list= Mcrypt_list_algorithms ();//MCrypt List of supported cryptographic algorithms$mode _list= Mcrypt_list_modes ();//MCrypt supported encryption mode list//Print_r ($cipher _list);//Print_r ($mode _list);functionEncrypt$

In many cases, we need to encrypt and decrypt data. For example, some data needs to be stored in cookies, but it cannot be easily obtained by users, in this case, we need to encrypt the data and save it to the cookie, and decrypt it when we need to

1 Define(' KEY ', ' 123456 ');2 $data= ' Oehpetyftdywz3frzi1kkgtizgqs ';//information that is encrypted3 $encrypt= Encrypt ($data); 4 $decrypt= Decrypt ($encrypt); 5 Echo $encrypt, "\ n",$decrypt; 6 functionDecrypt$data) {7 $key=MD5(KEY);8

In many cases, we need to encrypt and decrypt data. For example, some data needs to be stored in cookies, but it cannot be easily obtained by users, in this case, we need to encrypt the data and save it to the cookie, and decrypt it when we need to

#!/usr/local/bin/php-----------------------------------------------------------Use the file/usr/local/apache/conf/httpd.conf/etc/userdomainsEnter the URL to check the account////////////////////////////////////////////////////// paymentcopy.phpecho '

PHP common processing static operations A detailed PHP operation class that is often used for development-I hope you can add more-improve this operation class   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Lab environment: 1,RootHow to recover password loss Start the instance, press any key to enter GRUB mode, and press "e" to edit GRUB. Select the kernel part of the second line and press "e" to enter the editing mode. Enter sulinux = 0 1 and press

For PHP master, look at the principle of this section of encryption algorithm function Sys_auth ($str, $action = ' encode ', $key = ') {$key = MD5 ($key);$str = $action = = = ' encode '? $STR: Base64_decode ($STR);$strlen = strlen ($STR);$keylen =

function Encrypt ($data, $key){$key = MD5 ($key);$x = 0;$len = strlen ($data);$l = strlen ($key);for ($i = 0; $i if ($x = = $l) {$x = 0;}$char. = $key {$x};$x + +;}for ($i = 0; $i $str. = Chr (Ord ($data {$i}) + (Ord ($char {$i}))% 256);}Return Base6

classbase64{/** * Encrypt String * @access static * @param string $data String * @param string $key Encrypt key * @return string */ Public Static functionEncode$data,$key){ $key=MD5($key); $data=Base64_encode($data);

KEY is a previously defined constantMcrypt::encrypt ();Mcrypt::d ecrypt ();Defined (' ROOT ') or exit (' Access Denied '); class mcrypt{public static function encrypt ($code) { return base64_ Encode (Mcrypt_encrypt (mcrypt_rijndael_256

First, bubble sortPHP$arr=Array(1,5,9,7,2,8,4,3,6);//control the bubbling rounds for($i= 1;$iCount($arr);$i++) { //control how many times you need to compare, one number per round for($k= 0;$kCount($arr)-$i;$k++){ if($arr[$k]>$arr[$k+1]

//Cryptographic FunctionsfunctionLock_url ($txt,$key= ' Www.jb51.net '){ $chars= "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789-=+"; $nh=Rand(0,64); $ch=$chars[$nh]; $mdKey=MD5($key.$ch); $mdKey=substr($mdKey,$nh%8$nh%8+7);

Encryption algorithmfunction Encrypt ($data, $key){$key = MD5 ($key);$x = 0;$len = strlen ($data);$l = strlen ($key);$char = $str = ";for ($i = 0; $i {if ($x = = $l){$x = 0;}$char. = $key {$x};$x + +;}for ($i = 0; $i {$str. = Chr (Ord ($data {$i}) +

  This article mainly introduces a set of PHP reversible encryption and decryption algorithm instance code, a friend in need can refer to the For most cryptographic cryptography, we can use MD5, SHA1 and other methods. Can effectively prevent data