PHP random file include error

In my proxy page is a code:

<? 
$path = '/home/aluke/public_html/ads/'; // remeber trailing slash!
$handle = opendir ($path);
while (($filename = readdir ($handle)) !== false)
{
if ($filename != '.' && $filename != '..')
{
$file_array[] = $filename;
}
}

$rand = rand (0, count ($file_array));
include ($path . $file_array[$rand]);  
?>

PHP:

This code includes random file from ads folder.
Problem is that it sometimes gives me the following error:

Warning: main(/home/aluke/public_html/ads/) [function.main]: failed to open stream: Success in /home/aluke/public_html/index.php on line 125

Warning: main(/home/aluke/public_html/ads/) [function.main]: failed to open stream: Permission denied in /home/aluke/public_html/index.php on line 125

Warning: main() [function.include]: Failed opening '/home/aluke/public_html/ads/' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/aluke/public_html/index.php on line 125

PHP:

What causes this error?
Thanks in advance!

 

The range is wrong.

Between 0 and the "sizeof" your array is wrong, because if rand() decides to take the value returned by sizeof() (The highest value of the allowed range), you'll get an undefined index.

Use array_rand() instead, to avoid complications.

$rand = $file_array[array_rand($file_array)];

PHP:

 

I replaced

$rand = rand (0, count ($file_array));

PHP:

with

$rand = $file_array[array_rand($file_array)];

PHP:

but now it gives me that error all the time...

 

Take out the $file_array[$rand] in your include:

include ($path . $file_array[$rand]);  

PHP:

And replace it with $rand.

include $path . $rand;

PHP:

EDIT:

Or leave your code as it is, and just replace:

$rand = $file_array[array_rand($file_array)];

PHP:

With

$rand = array_rand($file_array);

PHP:

 

Tried this, it works perfectly now. Thank you very much!