Would this php code work to delete all orphaned attachments?

[willms_jay]

Would this php code work to delete all orphaned attachments? (eg. attachments who don't have a post that actually useses them? (don't ask why... seems like one of the hacks i installed keep the attachments from getting deleted if a thread gets deleted.

PHP Code:

<?
        echo "Jordan's fix the attachment table php script!<br><br>";
 $connection = mysql_connect("localhost", "sampleci_jordan", "****");
 if (!$connection) {
   echo "<p> An error occured while trying to access the database, please notify the webmaster for a quick solution.</p><br>";
   echo mysql_errno().": ".mysql_error()."<br>";
   exit();
 }

 $query = "SELECT attachmentid from attachment";
 $result = mysql_db_query("sampleci_samplecitynet", $query);
 if ($result) {
  $numOfRows = mysql_num_rows ($result);
                echo "Found " . $numOfRows . " attachments..<Br>";
  for ($i = 0; $i < $numOfRows; $i++){

   $attachmentid[$i] = mysql_result ($result, $i, "attachmentid");
  } // end for 
 } // end if

 echo "Checking to see if posts have these and then generating a list of those that don't<br><Br>";
 for ($i = 0; $i < count($attachmentid); $i++){
   $query = "SELECT attachmentid, postid FROM post WHERE attachmentid = " . $attachmentid[$i];
  $result = mysql_db_query("sampleci_samplecitynet", $query);
 
  if ($result) {
   // keepe the attachment
   $numOfRows = mysql_num_rows ($result);
   echo " Attachment id : " . $attachmentid[$i] . "<br>";
   if ($numOfRows == 0) {
                                // delete the attachment here!
    echo "Reject!<br>";
   }
   else {
    // don't do anything at all!
    echo "Keep!<br>";
   
   }
 
  } // end if
  else {
   // Delete the attachment!
   echo "No result set!";
  }
 } // end for
 

?>

what do you think? Is my logic correct?

..jordan

[filburt1]

[sql]
SELECT a.attachmentid FROM attachment a
LEFT JOIN post p ON a.attachmentid = p.attachmentid
WHERE p.attachmentid IS NULL;
[/sql]
Theoretically that query will work but it will take an insanely long time to execute (50 sec on my machine).