PHP Example
Screen shot
Screen shot
Screen shot
Index.php

<html>
<head>
<title>php example</title>
</head>
<body>
<form name="frm" action="qty.php" method="post">
Enter No of Item<input name="no_of_item" type="text"><br>
<input name="btn" type="submit" value="submit">
</form>
</body>
</html>

qty.php

<html>
<head>
<title>php example</title>
</head>
<body>
<form name="frm" action="submit.php" method="post">
<?php
if(isset($_POST['btn']))
{
$count=$_POST['no_of_item'];
for($i=0;$i<$count;$i++)
{
?>
Enter Item Qty <?php echo $i+1; ?><input name="qty[]" type="text"><br>
<?php
}
}
?>
<input name="btn" type="submit" value="Submit">
</form>
</body>
</html>

submit.php

<?php
if(isset($_POST['btn']))
{
$count=count($_POST['qty']);
for($i=0;$i<$count;$i++)
{
echo 1+$i." Item Qty ".$_POST['qty'][$i]."<br>";
}
}
?>

You can download source code here