PHP encryption and decryption functions

This article mainly introduces the function of PHP encryption and decryption, which implements the function of encrypting some variable values. if you are interested, please refer to a function of PHP encryption and decryption, this function encrypts some variable values.
The encryption code is as follows:

/** Function: encrypt strings * parameter 1: content to be encrypted * parameter 2: key */function passport_encrypt ($ str, $ key) {// encryption function srand (double) microtime () * 1000000); $ encrypt_key = md5 (rand (0, 32000); $ ctr = 0; $ tmp = ''; for ($ I = 0; $ I
 
  

  
The decryption code is as follows:

  

  
/** Function: decrypts strings * parameter 1: ciphertext to be decrypted * parameter 2: 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
     
      

      
The usage is as follows:

      

      
$ Str = 'Author: Yu Haomiao; Tel: 13611972365; email: 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 the php encryption and decryption function shared for you. I hope you will like it and use it for your own learning.