[SOLVED] struggling to replace

[newbtophp]

Im stuck and in need of help. I have a file and for example contains:

 

<?php
$test = "variable";

function rrandom($input){
...
return $output;
}

eval(base64_decode("ZWNobyAieWF5Ijs="));

?>

 

 

If I run the file through my code, its meant to decode and output:

 

<?php
$test = "variable";

function rrandom($input){
...
return $output;
}

echo "yay";

?>

 

 

This is my code:

 

if (preg_match_all('/"([^"]+)"/Umis', $file, $match)) {
//Base64 decode the code within the quotes
$file2 = base64_decode($match[0][1]);

}
//Here it dont replace the eval statement with the decoded base64, instead it just replaces the outer quotes 
$toreplace = array('eval(base64_decode("', '"));');

$file = str_replace($toreplace, "$file2", $file);

//echo the output
echo($file);

 

 

But I get:

 

<?php
$test = "variable";

function rrandom($input){
...
   return $output;
}

//The $file2 decode doesnt replace it?
ZWNobyAieWF5Ijs=

?>

[newbtophp]

Oops very sorry i hit the submit button twice accidentally

[salathe]

The replacement could be done pretty easily with preg_replace_callback.  Something like:

 

echo preg_replace_callback(
'#\beval\(base64_decode\("([a-zA-Z0-9+/]+=*)"\)\);#',
function ($m) { return base64_decode($m[1]); },
$file
);

 

Note: The anonymous function is only available as of PHP 5.3, prior to that you could either use a normal named function or create_function (e.g. create_function('$m', 'return base64_decode($m[1]);'))

[newbtophp]

I've tried your code and it returns with syntax errors like:

 

"unexpected T_FUNCTION" and "unexpected ;"...

 

Im running php 5.

[salathe]

Please read the note that was attached to my post.