PHP reversible encryption/decryption function sharing_PHP tutorial

Function source code

Copy 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 function

Copy code 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);

http://www.bkjia.com/PHPjc/326127.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/326127.htmlTechArticleThe function source code copy code is as follows: function encrypt($data, $key) { $prep_code = serialize($data ); $block = mcrypt_get_block_size('des', 'ecb'); if (($pad = $block - (strlen($pr...