Recursive Directory Scan/Mapping PHP Function

Posted Thursday 15th October 2009

When one of our clients websites got hacked yesterday a lot of files had injected Javascript that needed to be removed. To quickly remove repeated strings from hundreds of files I whipped up a quick script that recursively scanned a directory and matched “injected” files.

Ignoring the preg matches and the infected files here’s a quick and simple function I thought I’d share. It recursively scans and maps from a set directory to an array in PHP.

Example Output:

Array
(
    [_session.gif] => _session.gif
    [bin] => Array
        (
            [viewport.js] => viewport.js
        )
 
    [datefunctions.js] => datefunctions.js
    [forIE] => Array
        (
            [csshover.htc] => csshover.htc
            [htcmime.php] => htcmime.php
            [pngbehavior.htc] => pngbehavior.htc
            [x.gif] => x.gif
        )
 
    [index.html] => index.html
    [mootools] => Array
        (
            [moodx.js] => moodx.js
            [moostick.js] => moostick.js
            [mootools-info.txt] => mootools-info.txt
            [mootools.js] => mootools.js
        )
 
    [multifile.js] => multifile.js
    [session.js] => session.js
    [tablesort.js] => tablesort.js
    [tabpane.js] => tabpane.js
)

PHP Function:

$directory = "../mlab/manager/media/script/";
 
function recursive($directory)
{
	$dirs = array_diff(scandir($directory), Array( ".", ".." ));
    $dir_array = Array();
 
    foreach($dirs as $d)
	{
        if(is_dir($directory."/".$d)) $dir_array[$d] = recursive($directory."/".$d);
        else $dir_array[$d] = $d;
    }
    return $dir_array; 
}	
 
$structure = recursive($directory);
 
echo "<pre>";
print_r($structure);
echo "