[PHP] mysql_fetch_row() and mysql_fetch_array()?

[Jimmy Bäckström]

Yo!
I am wondering what the difference is between mysql_fetch_array and mysql_fetch_row. I 
tried using this code:
$result = query("SELECT * FROM index1");

while ($row = mysql_fetch_row($result)) {...
but $row[] does not contain any data, but when I changed it to:
$row = mysql_fetch_array($result) ... it worked just fine.

So what is the difference?
/Jimmy