php 加密与解密

2020-07-08 5539

//php 加密与解密
header("Content-type:text/html ;charset=utf-8");
error_reporting(E_ERROR | E_WARNING | E_PARSE);//设置 PHP 的报错级别并返回当前级别
error_reporting(0);
function encrypt($str, $key) {
   $block = mcrypt_get_block_size('des', 'ecb');
   if (($pad = $block - (strlen($str) % $block))        $str .= str_repeat(chr($pad), $pad);
   }
   $encrypt = mcrypt_encrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB);
   return base64_encode($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        $str = substr($str, 0, strlen($str) - $pad);
   }
   return $str;
}
$s = "103-1000";
echo $s."
";
echo "密钥："."秘钥";
$str = encrypt($s,"秘钥");
echo "加密之后：".$str."
";
$str = decrypt($str,"秘钥");
echo "解密之后：".$str."
";

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