Php custom encryption and decryption implementation code _ PHP Tutorial

Php custom encryption and decryption implementation code. This article introduces php custom encryption and decryption. many of our friends use php's own. what if we write it ourselves? let's look at the code below. The code is as follows: Copy the code? Php says the article introduces php custom encryption and decryption. many of our friends use php's own. what if we write it ourselves? let's look at the code below.

The code is as follows:

// Description: encryption function written in PHP. private keys are supported. // Finishing: http://www.bKjia. c0m Function keyED ($ txt, $ encrypt_key) { $ Encrypt_key = md5 ($ encrypt_key ); $ Ctr = 0; $ Tmp = ""; For ($ I = 0; $ I { If ($ ctr = strlen ($ encrypt_key) $ ctr = 0; $ Tmp. = substr ($ txt, $ I, 1) ^ substr ($ encrypt_key, $ ctr, 1 ); $ Ctr ++; } Return $ tmp; } Function encrypt ($ txt, $ key) { Srand (double) microtime () * 1000000 ); $ Encrypt_key = md5 (rand (0, 32000 )); $ Ctr = 0; $ Tmp = ""; For ($ I = 0; $ I { If ($ ctr = strlen ($ encrypt_key) $ ctr = 0; $ Tmp. = substr ($ encrypt_key, $ ctr, 1). (substr ($ txt, $ I, 1) ^ substr ($ encrypt_key, $ ctr, 1 )); $ Ctr ++; } Return keyED ($ tmp, $ key ); } Function decrypt ($ txt, $ key) { $ Txt = keyED ($ txt, $ key ); $ Tmp = ""; For ($ I = 0; $ I { $ Md5 = substr ($ txt, $ I, 1 ); $ I ++; $ Tmp. = (substr ($ txt, $ I, 1) ^ $ md5 ); } Return $ tmp; } $ Key = "YITU.org "; $ String = "I am an encrypted character "; // Encrypt $ string, and store it in $ enc_text $ Enc_text = encrypt ($ string, $ key ); // Decrypt the encrypted text $ enc_text, and store it in $ dec_text $ Dec_text = decrypt ($ enc_text, $ key ); Print "encrypted text: $ enc_text "; Print "decrypted text: $ dec_text "; ?>

Refer custom encryption and decryption. many of our friends use php. what if we write it ourselves? let's look at the code below. The code is as follows? Php...