Using md5_file(); doesn't return the md5 sometimes?

Question

<?php
include_once('booter/login/includes/db.php');

$query="SELECT * FROM shells";
$result=mysql_query($query);
while($row=mysql_fetch_array($result, MYSQL_ASSOC)){

$hash = @md5_file($row['url']);
echo $hash . "<br>";
    }
?>

The above is my code. Usually it works flawlessly on most urls, but every now and then it will just skip the md5 on a line, as if it doesn't retrieve it, even though the file is there.

I can't figure out why. Any ideas?

EDIT: When removing the '@' it returns this:

[function.md5-file]: failed to open stream: No such file or directory

Answer 1

The @ in front of md5_file suppresses any warnings/errors that might be raised. Removing the @ will allow errors from md5_hash to be displayed and will allow you to see why it is occasionally failing.

---

No such file or directory simply means that there is no file with the name that has been searched. You might want to inspect the URLs that are causing those warnings; maybe they refer to a file that has been renamed or moved.