[RESOLVED] while loop problem when using "implode"

[lpa]

$result=mysql_query("SELECT folder FROM messages WHERE id IN(". implode(', ', $_POST['msg_id']).")") or die ('Error');
while ($row=mysql_fetch_assoc($result)) {

$folder = $row['folder']; 
echo "$folder<br>";

if ($folder == '0') echo "zero folder"; else echo "not zero folder";

}
echo "finished";

Problem: this script prints all $folder values and word "finished". For some reason it ignores the line

if ($folder == '0') echo "zero folder"; else echo "not zero folder";

and there is no output at all - not "zero folder" and "not zero folder".

Why?

Thanks.

[nevvermind]

My guess is because "not zero folder" equals to every folder with the exceptions of the zero ones.

$result=mysql_query("SELECT folder FROM messages WHERE id IN(". implode(', ', $_POST['msg_id']).")") or die ('Error');

while ($row=mysql_fetch_assoc($result)) {

  if ($folder == '0') {

 echo "zero folder";

  } else {

 echo $row['folder'] . '<br />';
  }

}
echo "finished"; 

[lpa]

thank you, nevermind. resolved the problem.