php实现的三个常用加密解密功能函数示例
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2022-04-10 08:06:21
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:
算法一:
//加密函数
function lock_url($txt,$...
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:
算法一:
//加密函数 function lock_url($txt,$key='www.jb51.net') { $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.jb51.net') { $txt = urldecode($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:
$str=""; $pwd = lock_url($str); echo "加密之后:".$pwd."<br/>"; echo "解密还原:".unlock_url($pwd);
运行结果:
算法二:
<?php function passport_encrypt($txt, $key = 'www.jb51.net') { 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.jb51.net') { $txt = passport_key(base64_decode(urldecode($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 $decrypt."<br>"; ?>
运行结果:
算法三(改进第一个加密之后的算法)
//加密函数 function lock_url($txt,$key='www.jb51.net') { $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.jb51.net') { $txt = base64_decode(urldecode($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:
$str=""; $pwd = lock_url($str); echo "加密之后:".$pwd."<br/>"; echo "解密还原:".unlock_url($pwd);
运行结果:
ps:关于加密解密感兴趣的朋友还可以参考本站在线工具:
文字在线加密解密工具(包含aes、des、rc4等):
md5在线加密工具:
http://tools.jb51.net/password/createmd5password
在线散列/哈希算法加密工具:
在线md5/hash/sha-1/sha-2/sha-256/sha-512/sha-3/ripemd-160加密工具:
在线sha1/sha224/sha256/sha384/sha512加密工具:
更多关于php相关内容感兴趣的读者可查看本站专题:《php加密方法总结》、《php编码与转码操作技巧汇总》、《php数学运算技巧总结》、《php数组(array)操作技巧大全》、《php字符串(string)用法总结》、《php数据结构与算法教程》、《php程序设计算法总结》及《php正则表达式用法总结》
希望本文所述对大家php程序设计有所帮助。
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