PHP encryption and decryption functions in detail, encryption and decryption functions in detail _php tutorial

PHP encryption and decryption functions in detail, encryption and decryption functions in detail

Share a PHP cryptographic decryption function that implements the ability to encrypt part of a variable's value.
The encryption code is as follows:

/* Function: Encrypt the string * parameter one: What needs to be encrypted * parameter two: Key */function Passport_encrypt ($STR, $key) {//Cryptographic function Srand ((double) microtime () * 10000   00);   $encrypt _key=md5 (rand (0, 32000));   $ctr = 0;   $tmp = "; for ($i =0; $i
 
  
The decryption code is as follows:

  
/* Function: Decrypt the String * parameter one: ciphertext to be decrypted * parameter two: Key */function Passport_decrypt ($STR, $key) {//decryption function $str =passport_key (base64_decode   ($STR), $key);   $tmp = "; for ($i =0; $i
   
    
Auxiliary functions:

    
/* Auxiliary function */function Passport_key ($STR, $encrypt _key) {$encrypt _key=md5 ($encrypt _key);   $ctr = 0;   $tmp = "; for ($i =0; $i
     
      
Use the following as follows:

      
$str = ' Author: Yu Haomio; tel: 13611972365; e-mail: 123cvbz@163.com ';  $key = ' hacker '; $encrypt =passport_encrypt ($str, $key); $decrypt =passport_decrypt ($encrypt, $key);  Echo ' original: ', $str. '
"; Echo ' ciphertext: ', $encrypt. "
"; echo ' translation: ', $decrypt. '

      
The above is for everyone to share the PHP encryption and decryption functions, I hope you like, you can apply to their own learning.

      

      
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