PHP implementation of cryptographic decryption processing class, PHP implementation of encryption and decryption _php tutorial

PHP implementation of cryptographic decryption processing class, PHP implementation of encryption and decryption

This paper describes the cryptographic decryption processing class implemented by PHP. Share to everyone for your reference, as follows:

<?php/*=========================================================== = Copyright agreement: = GPL (The GNU general public LICENSE Vers  Ion 2, June 1991) =------------------------------------------------------------= File name: cls.sys_crypt.php = Pick To: PHP cryptographic decryption Processing class = Version: 1.0 = reference: Discuz Forum Passport-related function =------------------------------------------------------------= last update Date: 2007-12-09 ============================================================*/class Syscrypt {private $crypt _key;//  Constructor public Function __construct ($crypt _key) {$this, crypt_key = $crypt _key;} public Function Php_encrypt ($txt) {  Srand (Double) microtime () * 1000000);  $encrypt _key = MD5 (rand (0,32000));  $ctr = 0;  $tmp = "; for ($i = 0; $i
 
  
    Crypt_key));  Public Function Php_decrypt ($txt) {$txt = Self::__key (Base64_decode ($txt), $this-Crypt_key);  $tmp = ";   for ($i = 0; $i < strlen ($txt); $i + +) {$MD 5 = $txt [$i];  $tmp. = $txt [+ + $i] ^ $MD 5; } return $tmp;  } Private Function __key ($txt, $encrypt _key) {$encrypt _key = MD5 ($encrypt _key);  $ctr = 0;  $tmp = ";   for ($i = 0; $i < strlen ($txt); $i + +) {$ctr = $ctr = = strlen ($encrypt _key)? 0: $ctr;  $tmp. = $txt [$i] ^ $encrypt _key[$ctr + +]; } return $tmp; Public Function __destruct () {$this-crypt_key = null;}} Execute code $SC = new Syscrypt (' phpwms '); $text = ' abc10000008910000000990099hh '; Data print that requires encryption ($SC-Php_encrypt ($text)); Encrypt print (' 
   
 '), print ($SC-Php_decrypt ($SC-Php_encrypt ($text)));//Decrypt?> 
  
 

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I hope this article is helpful to you in PHP programming.

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