php base64_decode 解码方法

时间：2023-03-08 17:32:55
php base64_decode 解码方法 
<?php

header('Content-Type:text/html;charset=utf-8');

function encode_file_contents($filename) {

    $type=strtolower(substr(strrchr($filename,'.'),1));

    if('php'==$type && is_file($filename) && is_writable($filename)){// 如果是PHP文件 并且可写 则进行压缩编码

        $contents = file_get_contents($filename);// 判断文件是否已经被编码处理

        $pos = strpos($contents,'powered by arzn QQ:1314778');

        if(false === $pos || $pos>100){ // 去除PHP文件注释和空白，减少文件大小

            $contents = php_strip_whitespace($filename);

            // 去除PHP头部和尾部标识

            $headerPos = strpos($contents,'<?php');

            $footerPos = strrpos($contents,'?>');

            $contents = substr($contents,$headerPos+5,$footerPos-$headerPos);

            $encode = base64_encode(gzdeflate($contents));// 开始编码

            $encode = '<?php'."\n eval(gzinflate(base64_decode("."'".$encode."'".")));\n\n?>";

            return file_put_contents($filename,$encode);

        }

    }

    return false;

}

//调用函数

$filename='1.php';

encode_file_contents($filename);

echo "OK,加密完成！"

?>

以上是加密代码

下面是解密代码

<?php

        $Code = '这里填写要解密的编码'; // base64编码

        $File = 'decoded.php';//解码后保存的文件

        $Temp = base64_decode($Code);

        $temp = gzinflate($Temp);

        $FP = fopen($File,"w");

        fwrite($FP,$temp);

        fclose($FP);

        echo "解密成功！";

?>

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