Adding multiple text fields at once into mysql?

hello all,



this works perfect but is this the proper way to do this?

<?
/////////////////add/////////////////////////////////
	
	for ($i=0; $i<count($_POST['newhour_start']); $i++) {	
		if ($_POST['newhour_start'][$i] !="" && $_POST['newhour_end'][$i] !="" ) {
			$inserthour = mysql_query("INSERT INTO hour 
		    (hour_start,hour_end,hour_day) VALUES 
			('".$_POST['newhour_start'][$i]."','".$_POST['newhour_end'][$i]."','".$_POST['newhour_day'][$i]."')");
		}
	}
?>
Start:<input name="newhour_start[]" type="text" id="newhour_start" > End: <input name="newhour_end[]" type="text" id="newhour_end" ><input name="newhour_day[]" type="hidden" id="newhour_day" value="Monday" >

Start:<input name="newhour_start[]" type="text" id="newhour_start" > End: <input name="newhour_end[]" type="text" id="newhour_end" ><input name="newhour_day[]" type="hidden" id="newhour_day" value="Monday" >

Start:<input name="newhour_start[]" type="text" id="newhour_start" > End: <input name="newhour_end[]" type="text" id="newhour_end" ><input name="newhour_day[]" type="hidden" id="newhour_day" value="Monday" >

PHP:

 

<?php

$newhour_start = $_POST['newhour_start'];
$newhour_stop = $_POST['newhour_stop'];
$newhour_day = $_POST['newhour_day'];

$count = min(count($newhour_start), count($newhour_stop), count($newhour_day));

for($i=0;$i<$count;$i++)
{
if(!empty($newhour_start[$i]) && !empty($newhour_stop[$i]) && !empty($newhour_day[$i])
{
if(!mysql_query(sprintf("INSERT INTO `hour` (`hour_start`,`hour_end`,`hour_day`) VALUES (%d, %d, %d)", $newhour_start[$i], $newhour_stop[$i], $newhour_day[$i])))
{
// An error occurred.
echo 'Error!';
}
}
}

PHP:

That is how I'd personally do the PHP, or else something very similar to that.