Posting dynamic textboxes using PHP

Please see my code snippet below.

Basically I want to post a number of dymanic textboxes into a DB via PHP. I have done this with checkboxes but can't seem to do this for textboxes too.

Any help would be greatly appreciated. Thanks in advance.

<?php
if(isset($_POST['SubmitForm'])) {
    
    if(isset($_POST['Desc'])) {
        
        foreach($_POST['Desc'] as $str) {
            
            # Connect to DB (via class)
            $this->ConnectDB();
            
            $sql    =    sprintf('UPDATE Products SET
                                 Description = "%s"
                                 WHERE ItemId = %d
                                 AND ProductId = %d',
                                 mysql_real_escape_string($str),
                                 $itemId,
                                 1337);
            
            $query  =    mysql_query($sql);
        }
    }
}
?>
<form method="post" action="<?=$_SERVER['REQUEST_URI']?>">
  <input name="Desc[]" type="text" value="Description 1"> <!-- Item ID: 1 -->
  <input name="Desc[]" type="text" value="Description 2"> <!-- Item ID: 2 -->
  <input name="Desc[]" type="text" value="Description 3"> <!-- Item ID: 3 -->
  <input name="Desc[]" type="text" value="Description 4"> <!-- Item ID: 4 -->
  <input name="Desc[]" type="text" value="Description 5"> <!-- Item ID: 5 -->
  <input name="SubmitForm" type="submit" value="Submit">
</form>

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