Two cracking methods for PHP base64_decode_PHP tutorial

PHP base64_decode+gzinflate compression encoding and decoding code

PHP is being used more and more on the Internet, and the topic of encryption and decryption has never stopped. The following is a brief introduction to the base64_decode+gzinflate compression encoding and decoding code method, which is the encryption method in the form of eval(gzinflate(base64_decode(encryption code))); that we usually see in programs.
There is such a method on the Internet, but due to the partial lack of certain characters, it cannot be used after encryption. If you are interested, you can give it a try. I made simple modifications based on the original, and there is no error after testing.
Note: When decrypting, please do not use Chinese or names with spaces as file names

Compression encoding (encryption) code:

Quote content
function encode_file_contents($filename) {
$type=strtolower(substr(strrchr($filename,.),1));
if(php==$type && is_file($filename) && is_writable($filename)){// If it is a PHP file and it is writable, compress it and encode it
$contents = file_get_contents($filename); // Determine whether the file has been encoded
$pos = strpos($contents,powered by arzn QQ:1314778);
if(false === $pos || $pos>100){ // Remove comments and blanks from PHP files to reduce file size
$contents = php_strip_whitespace($filename);
// Remove PHP header and trailer tags
$headerPos = strpos($contents, $footerPos = strrpos($contents,?>);
$contents = substr($contents,$headerPos+5,$footerPos-$headerPos);
$encode = base64_encode(gzdeflate($contents));//Start encoding
$encode = ";
return file_put_contents($filename,$encode);
}
}
return false;
}
//Call function
$filename=code.php;
encode_file_contents($filename);
echo "OK, encryption completed!"
?>

Compression decoding (decryption) code:

Quote content

$Code = Fill in the code to be decrypted here; // base64 encoding
$File = decoded.php;//File saved after decoding
$Temp = base64_decode($Code);
$temp = gzinflate($Temp);
$FP = fopen($File,"w");
fwrite($FP,$temp);
fclose($FP);
echo "Decryption successful!";
?>