php自定义加密与解密程序实例,php加密与解密实例
php自定义加密与解密程序实例,php加密与解密实例
本文实例讲述了php自定义加密与解密程序。分享给大家供大家参考。具体分析如下:
PHP3 Cryption是一个非常容易被破解,不安全的加密功能,不应该是非常重要的东西用,虽然加密是好的,它不会阻碍对尖端开裂程序的严格考验.
不过,试试吧...这是一个伟大的方式来加密和解密字符串。与许多隐窝功能,这是双向的。基于一个密码,您可以加密或解密。您也可以解密或加密过无数次,通过循环或其他方法。字母表中的字符也是变化的。所有这些事情让你修改和巩固加密。
关于这最佳的部分?您可以加密与解密或一张纸和一支铅笔一块。这需要相当长一点,但你并不需要一台电脑是附近使用它,如果你曾经失去的代码,如果你还记得你的技术可以解密。
我写在约一小时这些功能,经过几次不成功的和令人沮丧的尝试,并获得了更长的时间我没有出路的。成功的那天后的最佳方式做它突然实现。
请注意,这不会加密/解密无形字符(空格),如换行符(n)或标签(吨)!很抱歉,但我尝试,如果你找到一个办法,请让我知道!
复制代码 代码如下:
$ralphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 !,.:;?~@#$%^&*()_+-=][}{/>
$alphabet = $ralphabet . $ralphabet;
class Crypto {
function encrypt ($password,$strtoencrypt) {
global $ralphabet;
global $alphabet;
for( $i=0; $i
$cur_pswd_ltr = substr($password,$i,1);
$pos_alpha_ary[] = substr(strstr($alphabet,$cur_pswd_ltr),0,strlen($ralphabet));
}
$i=0;
$n = 0;
$nn = strlen($password);
$c = strlen($strtoencrypt);
while($i
{
$encrypted_string .= substr($pos_alpha_ary[$n],strpos($ralphabet,substr($strtoencrypt,$i,1)),1);
$n++;
if($n==$nn) $n = 0;
$i++;
}
return $encrypted_string;
}
function decrypt ($password,$strtodecrypt) {
global $ralphabet;
global $alphabet;
for( $i=0; $i
$cur_pswd_ltr = substr($password,$i,1);
$pos_alpha_ary[] = substr(strstr($alphabet,$cur_pswd_ltr),0,strlen($ralphabet));
}
$i=0;
$n = 0;
$nn = strlen($password);
$c = strlen($strtodecrypt);
while($i
{
$decrypted_string .= substr($ralphabet,strpos($pos_alpha_ary[$n],substr($strtodecrypt,$i,1)),1);
$n++;
if($n==$nn) $n = 0;
$i++;
}
return $decrypted_string;
}
function cryption_table ($password) {
global $ralphabet;
global $alphabet;
for( $i=0; $i
$cur_pswd_ltr = substr($password,$i,1);
$pos_alpha_ary[] = substr(strstr($alphabet,$cur_pswd_ltr),0,strlen($ralphabet));
}
print "
"; | " . substr($ralphabet,$j,1) . " | n";
" . ($i+1) . "| | ";" . substr($pos_alpha_ary[$i],$k,1) . " | n";
}
} // end class Crypto
// Example written by Macro Zeng
$ct = new Crypto;
//$ct->cryption_table($password);
echo "";
复制代码 代码如下:
highlight_file("crypto.php");
希望本文所述对大家的php程序设计有所帮助。

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