求base64解密

Question

$guilD=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A");$dbE=$guilD{3}.$guilD{6}.$guilD{33}.$guilD{30};$QWvjzCmYyAno=$guilD{33}.$guilD{10}.$guilD{24}.$guilD{10}.$guilD{24};$nowfFLKxHR=$QWvjzCmYyAno{0}.$guilD{18}.$guilD{3}.$QWvjzCmYyAno{0}.$QWvjzCmYyAno{1}.$guilD{24};$BPOeMVkq=$guilD{7}.$guilD{13};$dbE.=$guilD{22}.$guilD{36}.$guilD{29}.$guilD{26}.$guilD{30}.$guilD{32}.$guilD{35}.$guilD{26}.$guilD{30};

Answer 1

Array
(
    [guilD] => n1zb/ma5\vt0i28-pxuqy*6lrkdg9_ehcswo4+f37j
    [dbE] => base64_decode
    [QWvjzCmYyAno] => strtr
    [nowfFLKxHR] => substr
    [BPOeMVkq] => 52
)

Answer 2

有相关函数的。base64只是转换而已。

Answer 3

$str = "大家好！各位幸苦了";
$crc32_source = crc32($str);
base64_encode($str);//base_64加密
base64_decode($str)//base_64解密
$crc32 = crc32($str);
if($crc32_source == $crc32)
{
     echo $str;//大家好！各位幸苦了
}