人生若只如初见 - 加密解密 2026-04-07T20:01:00+08:00 Typecho https://blog.ilingku.com/feed/atom/tag/%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86/ <![CDATA[php实现的三个常用字符串加密解密功能函数案例]]> https://blog.ilingku.com/archives/6/ 2026-04-07T20:01:00+08:00 2026-04-07T20:01:00+08:00 kevin 这篇文章主要介绍了php实现的三个常用加密解密功能函数,涉及php针对字符串的遍历、截取、编码转换等相关操作技巧,需要的朋友可以参考下
{alert type="success"}
本文实例讲述了php实现的三个常用加密解密功能函数。分享给大家供大家参考，具体如下：
{/alert}

//加密函数
function lock_url($txt,$key='www.ilingku.com')
{
  $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; $i<strlen($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='www.ilingku.com')
{
  $txt = urldecode($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; $i<strlen($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);
}

用法：

{alert type="info"}
$str=”领酷网”;
$pwd = lock_url($str);
echo “加密之后：”.$pwd.”<br/>”;
echo “解密还原：”.unlock_url($pwd);
{/alert}

算法二：

<?php
function passport_encrypt($txt, $key = 'www.ilingku.com') 
{ 
  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, $key))); 
} 
function passport_decrypt($txt, $key = 'www.ilingku.com') 
{ 
  $txt = passport_key(base64_decode(urldecode($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; 
} 
?>

用法：

<?php
$txt = "1";
$key = "testkey";
$encrypt = passport_encrypt($txt,$key);
$decrypt = passport_decrypt($encrypt,$key);
echo $encrypt."<br>";
echo $decrypt."<br>";
?>

算法三（改进第一个加密之后的算法）

//加密函数
function lock_url($txt,$key='www.ilingku.com')
{
  $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; $i<strlen($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='www.ilingku.com')
{
  $txt = base64_decode(urldecode($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; $i<strlen($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);
}

用法

{alert type="warning"}
$str="领酷网";
$pwd = lock_url($str);
echo "加密之后：".$pwd."<br/>";
echo "解密还原：".unlock_url($pwd);
{/alert}

]]> <![CDATA[简单PHP对字符串加密解密方法案例]]> https://blog.ilingku.com/archives/5/ 2026-04-07T20:00:00+08:00 2026-04-07T20:00:00+08:00 kevin 在经过URL传输后出现解释不了的情况，无论使用URL转码还是什么，都不起作用，时好时坏，所以就自己随便写了一个加密解密的方法，希望能暂时满足项目的需求吧，目前至少一没有看到代码的人，是很难找到破解的方法的，而且满足在网络中传输后可以正常解码。同时也在这里分享一下，希望得到大家指正，以便完善下代码

/**
 * 简单对称加密算法之加密
 * @param String $string 需要加密的字串
 * @param String $skey 加密EKY
 * @date 2013-08-13 19:30
 * @update 2014-10-10 10:10
 * @return String
 */function encode($string = '', $skey = 'cxphp') {
    $strArr = str_split(base64_encode($string));
    $strCount = count($strArr);    foreach (str_split($skey) as $key => $value)
        $key < $strCount && $strArr[$key].=$value;    return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
}/**
 * 简单对称加密算法之解密
 * @param String $string 需要解密的字串
 * @param String $skey 解密KEY
 * @date 2013-08-13 19:30
 * @update 2014-10-10 10:10
 * @return String
 */function decode($string = '', $skey = 'cxphp') {
    $strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
    $strCount = count($strArr);    foreach (str_split($skey) as $key => $value)
        $key <= $strCount  && isset($strArr[$key]) && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];    return base64_decode(join('', $strArr));
}echo '<pre>';
$str = '56,15123365247,54,四大古典风格';echo "string : " . $str . " <br />";echo "encode : " . ($enstring = encode($str)) . '<br />';echo "decode : " . decode($enstring);die();

为了感谢各位大神的捧场，对于此帖的提问我会积极答复，同时也想借这个平台与大家交流一下经验，谢谢！

修复短字符串解密时数组下标越界的问题
使用base64安全处理方案解决URL传输问题

/**
 * 安全URL编码
 * @param string $data
 * @author Anyon <zoujingli@qq.com>
 * @date 2017/06/26
 * @return string
 */function encode($data) {    return str_replace(array('+', '/', '='), array('-', '_', ''), base64_encode(serialize($data)));
}/**
 * 安全URL解码
 * @param string $string
 * @date 2017/06/26
 * @return string
 */function decode($string) {
    $data = str_replace(array('-', '_'), array('+', '/'), $string);
    $mod4 = strlen($data) % 4;
    ($mod4) && $data .= substr('====', $mod4);    return unserialize(base64_decode($data));
}

增加UTF8三十六进制加密与解密

/**
 * UTF8字符串加密
 * @param string $string
 * @date 2017/06/26
 * @return string
 */function encode($string) {
    $chars = '';
    $len = strlen($string = iconv('utf-8', 'gbk', $string));    for ($i = 0; $i < $len; $i++) {
        $chars .= str_pad(base_convert(ord($string[$i]), 10, 36), 2, 0, 0);
    }    return strtoupper($chars);
}/**
 * UTF8字符串解密
 * @param string $string
 * @date 2017/06/26
 * @return string
 */function decode($string) {
    $chars = '';    foreach (str_split($string, 2) as $char) {
        $chars .= chr(intval(base_convert($char, 36, 10)));
    }    return iconv('gbk', 'utf-8', $chars);
}
]]>