PHP Data encryption operations

: This article mainly introduces the operation of PHP Data Encryption. if you are interested in the PHP Tutorial, refer to it.

Class PHPMcrypt {/* operation handle */private $ crypt = null;/* generated key */private $ key = null;/* initial vector */private $ iv = null; /* maximum supported Keys */private $ ks = null;/* whether the data type is acceptable */private $ accept = false; // false cannot accept true acceptable/* serialization required */private $ serialize = false; // false do not require serialization true public function _ construct ($ secretKey = '! @ # $ % ^ ') {/* Open the encryption algorithm and mode */$ this-> crypt = mcrypt_module_open ('tripledes', '', 'nofb ',''); /* create an initial vector and check the key length. */$ This-> iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($ this-> crypt), MCRYPT_RAND ); /* obtain the longest supported Keys */$ this-> ks = mcrypt_enc_get_key_size ($ this-> crypt ); /* generate the key */$ this-> key = substr (md5 ($ secretKey), 0, $ this-> ks );} /*** whether the data type is acceptable or not * $ data int | string the data to be encrypted * return boolean */private function acceptAndSerialize ($ data) {$ type = gettype ($ data); switch ($ type) {case 'string': case 'integer': case 'float': c Ase 'double': $ this-> accept = true; $ this-> serialize = false; break; case 'array': case 'object ': $ this-> accept = true; $ this-> serialize = true; break; default: $ this-> accept = false; $ this-> serialize = false ;}} /*** encrypt data ** $ data mixed * return string | boolean */public function encrypt ($ data) {$ this-> acceptAndSerialize ($ data ); if (empty ($ data) | ($ this-> accept = false) {return false;} // serialization If ($ this-> serialize) {$ data = serialize ($ data);}/* initialize encryption */mcrypt_generic_init ($ this-> crypt, $ this-> key, $ this-> iv);/* encrypt data */$ encrypt = mcrypt_generic ($ this-> crypt, $ data);/* the string is encoded in MIME Base64. This encoding method allows smooth transmission of Chinese text or images over the network */$ encrypt = base64_encode ($ encrypt); if ($ this-> serialize) {$ encrypt. = '| '. $ this-> serialize;}/* ends encryption and performs cleanup */mcrypt_generic_deinit ($ this-> crypt); return $ encrypt ;} /*** decrypt data ** $ data string * return mixed */public function decrypt ($ data) {if (empty ($ data) {return false ;} /* determine whether to serialize */if (strpos ($ data, '|') {$ tempData = explode ('|', $ data ); $ data = $ tempData [0]; $ this-> serialize = $ tempData [1];}/* initialize decryption */mcrypt_generic_init ($ this-> crypt, $ this-> key, $ this-> iv);/* decrypt data */$ data = base64_decode ($ data); $ decrypt = mdecrypt_generic ($ this-> crypt, $ data);/* deserialization */if ($ this-> serialize) {$ decrypt = unserialize ($ decrypt);}/* ends encryption, execute cleanup */mcrypt_generic_deinit ($ this-> crypt); return $ decrypt;} public function _ destruct () {/* disable the encryption module */mcrypt_module_close ($ this-> crypt) ;}// int | float | string
$ OPHPMcrypt = new PHPMcrypt (123); $ encrypt = 'China * Shanghai-021 '; $ encrypt = $ oPHPMcrypt-> encrypt ($ encrypt); echo $ encrypt; echo'
'; $ Decrypt = $ oPHPMcrypt-> decrypt ($ encrypt); echo $ decrypt; // array | object $ oPHPMcrypt = new PHPMcrypt (123 ); $ encrypt = array ('name' => 'Zhang San', 'age' => 100); $ encrypt = $ oPHPMcrypt-> encrypt ($ encrypt); echo $ encrypt; echo'
'; $ Decrypt = $ oPHPMcrypt-> decrypt ($ encrypt); print_r ($ decrypt );


                                                
The above introduces the PHP Data encryption operation class, including the content, hope to be helpful to friends who are interested in the PHP Tutorial.