1.第一种
<?php
function encryptDecrypt($key, $string, $decrypt){
if($decrypt){
$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "12");
return $decrypted;
}else{
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key))));
return $encrypted;
}//代码效果参考：http://www.ezhiqi.com/zx/art_3160.html
}
//加密:"z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk="
echo encryptDecrypt('password', 'Helloweba欢迎您',0);
//解密:"Helloweba欢迎您"
echo encryptDecrypt('password', 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=',1);
?>
2.第二种
<?php
//加密函数
function lock_url($txt,$key='liiu'){
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
$nh = rand(0,64);
$ch = $chars【$nh】;
$mdKey = md5($key.$ch);
$mdKey = substr($mdKey,$nh%8, $nh%8+7);
$txt = base64_encode($txt);
$tmp = '';
$i=0;$j=0;$k = 0;
for ($i=0; $i[span style="color: rgba(0, 128, 128, 1)">strlen($txt); $i++) {
$k = $k == strlen($mdKey) ? 0 : $k;
$j = ($nh+strpos($chars,$txt【$i】)+ord($mdKey【$k++】))%64;
$tmp .= $chars【$j】;
}
return urlencode($ch.$tmp);
}
//解密函数
function unlock_url($txt,$key='liiu'){
$txt = urldecode($txt);
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
$ch = $txt【0】;
$nh = strpos($chars,$ch);
$mdKey = md5($key.$ch);
$mdKey = substr($mdKey,$nh%8, $nh%8+7);
$txt = substr($txt,1);
$tmp = '';
$i=0;$j=0; $k = 0;
for ($i=0; $i[span style="color: rgba(0, 128, 128, 1)">strlen($txt); $i++) {
$k = $k == strlen($mdKey) ? 0 : $k;
$j = strpos($chars,$txt【$i】)-$nh - ord($mdKey【$k++】);
while ($j<0) $j+=64;
$tmp .= $chars【$j】;
}
return base64_decode($tmp);
}
?>
3.第三种
<?php
//改进后的算法
//加密函数
function lock_url($txt,$key='str'){
$txt = $txt.$key;
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
$nh = rand(0,64);
$ch = $chars【$nh】;
$mdKey = md5($key.$ch);
$mdKey = substr($mdKey,$nh%8, $nh%8+7);
$txt = base64_encode($txt);
$tmp = '';
$i=0;$j=0;$k = 0;
for ($i=0; $i[span style="color: rgba(0, 128, 128, 1)">strlen($txt); $i++) {
$k = $k == strlen($mdKey) ? 0 : $k;
$j = ($nh+strpos($chars,$txt【$i】)+ord($mdKey【$k++】))%64;
$tmp .= $chars【$j】;
}
return urlencode(base64_encode($ch.$tmp));
}
//解密函数
function unlock_url($txt,$key='str'){
$txt = base64_decode(urldecode($txt));
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
$ch = $txt【0】;
$nh = strpos($chars,$ch);
$mdKey = md5($key.$ch);
$mdKey = substr($mdKey,$nh%8, $nh%8+7);
$txt = substr($txt,1);
$tmp = '';
$i=0;$j=0; $k = 0;
for ($i=0; $i[span style="color: rgba(0, 128, 128, 1)">strlen($txt); $i++) {
$k = $k == strlen($mdKey) ? 0 : $k;
$j = strpos($chars,$txt【$i】)-$nh - ord($mdKey【$k++】);
while ($j<0) $j+=64;
$tmp .= $chars【$j】;
}
return trim(base64_decode($tmp),$key);
}
?>
4.第四种
<?php
function passport_encrypt($txt, $key = 'liiu') {
srand((double)microtime() * 1000000);
$encrypt_key = md5(rand(0, 32000));
$ctr = 0;
$tmp = '';
for($i = 0;$i < strlen($txt); $i++) {
$ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
$tmp .= $encrypt_key【$ctr】.($txt【$i】 ^ $encrypt_key【$ctr++】);
}
return urlencode(base64_encode(passport_key($tmp, $key)));
}//代码效果参考：http://www.ezhiqi.com/bx/art_4413.html
function passport_decrypt($txt, $key = 'liiu') {
$txt = passport_key(base64_decode(urldecode($txt)), $key);
$tmp = '';
for($i = 0;$i < strlen($txt); $i++) {
$md5 = $txt【$i】;
$tmp .= $txt【++$i】 ^ $md5;
}
return $tmp;
}
function passport_key($txt, $encrypt_key) {
$encrypt_key = md5($encrypt_key);
$ctr = 0;
$tmp = '';
for($i = 0; $i < strlen($txt); $i++) {
$ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
$tmp .= $txt【$i】 ^ $encrypt_key【$ctr++】;
}
return $tmp;
}
$txt = "1";
$key = "testkey";
$encrypt = passport_encrypt($txt,$key);
$decrypt = passport_decrypt($encrypt,$key);
echo $encrypt."
";
echo $decrypt."
";
?>
5.第五种
<?php
//非常给力的authcode加密函数,Discuz!经典代码(带详解)
//函数authcode($string, $operation, $key, $expiry)中的$string：字符串，明文或密文；$operation：DECODE表示解密，其它表示加密；$key：密匙；$expiry：密文有效期。
function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
// 动态密匙长度，相同的明文会生成不同密文就是依靠动态密匙
$ckey_length = 4;
// 密匙
$key = md5($key ? $key : $GLOBALS【'discuz_auth_key'】);
// 密匙a会参与加解密
$keya = md5(substr($key, 0, 16));
// 密匙b会用来做数据完整性验证
$keyb = md5(substr($key, 16, 16));
// 密匙c用于变化生成的密文
$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';
// 参与运算的密匙
$cryptkey = $keya.md5($keya.$keyc<span style="c
