-- 作者:longlong
-- 发布时间:2010/1/4 12:56:55
-- [分享]实现php加密/解密代码
php加密/解密代码
php中怎么实现加密和怎么实现解密里。其实很简单。php有很多函数给大家用。今天就简单的写一段代码给大家。代码入邪 以下是代码片段: <?php $key = "www.029900.com!!!"; function keyED($txt,$encrypt_key) { $encrypt_key = md5($encrypt_key); $ctr=0; $tmp = ""; for ($i=0;$i<strlen($txt);$i++) { if ($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;$i<strlen($txt);$i++) { if ($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;$i<strlen($txt);$i++) { $md5 = substr($txt,$i,1); $i++; $tmp.= (substr($txt,$i,1) ^ $md5); } return $tmp; }
使用测试: $string = "029900.com!!!"; //加密并把加密的值给$enc_text $enc_text = encrypt($string,$key); //解密并把加密的值给$dec_text
$dec_text = decrypt($enc_text,$key);
//打印: print "Original text : $string <Br>"; print "Encrypted text : $enc_text <Br>"; print "Decrypted text : $dec_text <Br>"; ?>
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