文章介绍了关于php 自定义加密解密，很多朋友都是用php自带的，我们如果自己写个会怎么样呢，下面看代码。
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// 说明：PHP 写的加密函数,支持私人密钥 // 整理：http://www.bKjia.c0m function keyED($txt,$encrypt_key) { $encrypt_key = md5($encrypt_key); $ctr=0; $tmp = ""; for ($i=0;$i if ($ctr==strlen($encrypt_key)) $ctr=0; $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1); $ctr ; } return $tmp; } function encrypt($txt,$key) { srand((double)microtime()*1000000); $encrypt_key = md5(rand(0,32000)); $ctr=0; $tmp = ""; for ($i=0;$i if ($ctr==strlen($encrypt_key)) $ctr=0; $tmp.= substr($encrypt_key,$ctr,1) . (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1)); $ctr ; } return keyED($tmp,$key); } function decrypt($txt,$key) { $txt = keyED($txt,$key); $tmp = ""; for ($i=0;$i $md5 = substr($txt,$i,1); $i ; $tmp.= (substr($txt,$i,1) ^ $md5); } return $tmp; } $key = "YITU.org"; $string = "我是加密字符"; // encrypt $string, and store it in $enc_text $enc_text = encrypt($string,$key); // decrypt the encrypted text $enc_text, and store it in $dec_text $dec_text = decrypt($enc_text,$key); print "加密的 text : $enc_text "; print "解密的 text : $dec_text "; ?> |
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