Mcrypt reversible encryption algorithm in PHP _php tutorial

Mcrypt reversible encryption algorithm in PHP

$TD = Mcrypt_module_open (Mcrypt_des, ', ' ECB ', '); Using the mcrypt_des algorithm, the ECB mode

$iv = Mcrypt_create_iv (Mcrypt_enc_get_iv_size ($TD), Mcrypt_rand);
$ks = Mcrypt_enc_get_key_size ($TD);

$key = "ery secret key";//Key
$key = substr (MD5 ($key), 0, $ks);

Mcrypt_generic_init ($TD, $key, $IV); Initial processing

Encryption
$encrypted = Mcrypt_generic ($TD, ' This is very important data ');

End Processing
Mcrypt_generic_deinit ($TD);

Initial decryption processing
Mcrypt_generic_init ($TD, $key, $IV);

Decrypt
$decrypted = Mdecrypt_generic ($TD, $encrypted);

End
Mcrypt_generic_deinit ($TD);

Mcrypt_module_close ($TD);

After decryption, there may be a follow-up that needs to be removed
echo Trim ($decrypted). "N";

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