php - Encryption - Decryption, Database -

I have created two functions such as encryption and decryption

  function encryption ($ X) {$ Key = 'supercceptive'; $ Encrypted = encrypt_encrypt (MCRYPT_RIJNDAEL_256, $ key, $ x, MCRYPT_MODE_ECB); $ Encrypted return; } Function decryption ($ y) {$ key = 'SuperSecretKey'; $ Decrypted = mcrypt_decrypt (MCRYPT_RIJNDAEL_256, $ key, $ y, MCRYPT_MODE_ECB); Return $ decrypted; }   
 I got the encrypted password to work properly on my database, when I recover the password from the database, I get an encrypted password like this  
  $ dpass = "Select password from persons where email = '". $ _POST ['name'] "'"; $ Rpass = mysql_query ($ dpass); $ Line = mysql_fetch_array ($ rpass); $ Lpass = $ line ['password']; Echo $ lpass;   
 But the problem is that when U uses decryption func  
  $ d_pass = decryption ($ lpass); Echo $ d_pass;   
 Does not this teach me the same text that I used for the password? Can you tell me what is the problem?   
 
 
 try it  
  function encryption ($ x) {$ key = 'SuperSecretKey'; $ Encrypted = Base 64_encode (mcrypt_encrypt (MCRYPT_RIJNDAEL_256, MD5 ($ key), $ x, MCRYPT_MODE_CBC, MD5 (MD5 ($ key))); $ Encrypted return; } Function decryption ($ y) {$ key = 'SuperSecretKey'; $ Decrypted = rtrim (mcrypt_decrypt (MCRYPT_RIJNDAEL_256, MD5 ($ key), base64_decode ($ y), MCRYPT_MODE_CBC, MD5 (MD5 ($ key)), "\ 0"); Return $ decrypted; }