PHP reversible encryption/decryption functions-PHP Tutorial

PHP reversible encryption and decryption functions. The code for copying the function source code is as follows: functionencrypt ($ data, $ key) {$ prep_codeserialize ($ data); $ blockmcrypt_get_block_size (des, ecb ); if ($ pad $ block-(strlen ($ pr function source code)

The code is as follows:

Function encrypt ($ data, $ key ){
$ Prep_code = serialize ($ data );
$ Block = mcrypt_get_block_size ('Des ', 'ECB ');
If ($ pad = $ block-(strlen ($ prep_code) % $ block) <$ block ){
$ Prep_code. = str_repeat (chr ($ pad), $ pad );
}
$ Encrypt = mcrypt_encrypt (MCRYPT_DES, $ key, $ prep_code, MCRYPT_MODE_ECB );
Return base64_encode ($ encrypt );
}

Function decrypt ($ str, $ key ){
$ Str = base64_decode ($ str );
$ Str = mcrypt_decrypt (MCRYPT_DES, $ key, $ str, MCRYPT_MODE_ECB );
$ Block = mcrypt_get_block_size ('Des ', 'ECB ');
$ Pad = ord ($ str [($ len = strlen ($ str)-1]);
If ($ pad & $ pad <$ block & preg_match ('/'. chr ($ pad ). '{'. $ pad. '} $/', $ str )){
$ Str = substr ($ str, 0, strlen ($ str)-$ pad );
}
Return unserialize ($ str );
}

Call a function

The code is as follows:

$ Key = 'okyo. cn ';
$ Data = array ('id' => 100, 'username' => 'customer', 'password' => 'e10adc3949ba59abbe56e057f20f883e ');
$ Snarr = serialize ($ data );
$ En = encrypt ($ data, $ key );
$ De = decrypt ($ en, $ key );
Echo "encryption prototype :";
Print_r ($ data );
Echo"
Key: $ key

Encryption result: $ en

Decryption result :";
Print_r ($ de );

The authorization code is as follows: function encrypt ($ data, $ key) {$ prep_code = serialize ($ data); $ block = mcrypt_get_block_size ('Des ', 'ECB '); if ($ pad = $ block-(strlen ($ pr...