PHP Custom encryption method with encryption factor

Now PHP encryption methods have a lot of general, the general simple encryption method is directly MD5, but MD5 some simple password can also be decompile, so we now through the custom method to encrypt more secure.

Now is I collect and summarize some methods of PHP encryption method, share for everyone, for your reference.

Method One:

/*** Encrypt user's password * @param $password * @param $encrypt//Incoming encryption string, authentication when changing password * @return array/password*/function password ($ Password, $encrypt = ') {    $pwd = array ();    $pwd [' encrypt '] = $encrypt? $encrypt: Rand (1000,9999);     $pwd [' password '] = MD5 (MD5 (TRIM ($password)). $pwd [' encrypt ']);    Return $encrypt? $pwd [' Password ']: $pwd;}

Method Description: When we only pass in the password is, the method will return a cryptographic factor and a newly generated encryption password, and this encryption factor and password are randomly generated, each time is different.

Method Two:

/* * RC4 encryption Algorithm * $PWD key * $data data to be encrypted *  //$pwd key $data need to encrypt string function RC4 ($pwd, $data) {     $key [] = "";     $box [] = "";     $pwd _length = strlen ($pwd);     $data _length = strlen ($data);     for ($i = 0; $i < $i + +) {         $key [$i] = Ord ($pwd [$i% $pwd _length]);         $box [$i] = $i;     }     for ($j = $i = 0; $i < $i + +) {         $j = ($j + $box [$i] + $key [$i])%;         $tmp = $box [$i];         $box [$i] = $box [$j];         $box [$j] = $tmp;     }     for ($a = $j = $i = 0; $i < $data _length; $i + +) {         $a = ($a + 1)%;         $j = ($j + $box [$a])%;         $tmp = $box [$a];         $box [$a] = $box [$j];         $box [$j] = $tmp;         $k = $box [(($box [$a] + $box [$j])];         $cipher. = Chr (ord ($data [$i]) ^ $k);     }     return $cipher; }

Method Three:

/** +-----------------------------------------------------* Mcrypt Encrypt/decrypt * @param string $date the data to encrypt and decrypt * @param string $mode encode default to encrypt/decode for decryption * @return String * @author zxing@97md.net Mon Sep 22:59:28 CST +-------------------- ---------------------------------* @example */function Zxingcrypt ($date, $mode = ' encode ') {$key = MD5 (' zxing ');//MD     5 Hashishen into a key, note that the encryption and decryption keys must be unified if ($mode = = ' decode ') {$date = Base64_decode ($date); } if (Function_exists (' Mcrypt_create_iv ')) {$iv _size = mcrypt_get_iv_size (mcrypt_rijndael_256, MCRYPT_MODE_ECB         );     $iv = Mcrypt_create_iv ($iv _size, Mcrypt_rand); } if (Isset ($iv) && $mode = = ' encode ') {$passcrypt = Mcrypt_encrypt (mcrypt_rijndael_256, $key, $date,     MCRYPT_MODE_ECB, $IV); }elseif (Isset ($iv) && $mode = = ' decode ') {$passcrypt = Mcrypt_decrypt (mcrypt_rijndael_256, $key, $date, M     CRYPT_MODE_ECB, $IV); } if ($mode = = ' encode ') {$passcrypt = base64_Encode ($passcrypt); } return $passcrypt; }

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