php select

[tauchai83]

<?php
$day=date("d");
$month=date("m");
$year=date("Y");
$today=date("Y-m-d").":".date("Y-m-d");
$yesterday=date("Y-m-d",mktime(0,0,0,$month,$day-1,$year)).":".date("Y-m-d",mktime(0,0,0,$month,$day-1,$year));
$week=date("Y-m-d",mktime(0,0,0,$month,$day-6,$year)).":".date("Y-m-d",mktime(0,0,0,$month,$day,$year));
$thismonth=date("Y-m-d",mktime(0,0,0,$month,1,$year)).":".date("Y-m-d",mktime(0,0,0,$month,$day,$year));
$lastmonth=date("Y-m-d",mktime(0,0,0,$month-1,1,$year)).":".date("Y-m-d",mktime(0,0,0,$month-1,date("t",mktime(0,0,0,$month-1,1	,$year)),$year));
$thisyear=date("Y-m-d",mktime(0,0,0,1,1,$year)).":".date("Y-m-d",mktime(0,0,0,$month,$day,$year));
$alltime=date("Y-m-d",mktime(0,0,0,1,1,0000)).":".date("Y-m-d",mktime(0,0,0,$month,$day,$today));

$option_values=array("$today","$yesterday","$week","$thismonth","$lastmonth","$thisyear","$alltime");
$option_titles=array("Today","Yesterday","Last 7 Days","This Month","Last Month","This Year","All Time");

echo "
	<tr>
	<td><b>Date Range:</b>
	<select name='date_range'>";

	if($option_values[0]=!'')
	{
		echo"<option selected value=\"$option_values[0]\">$option_titles[0]</option>";
	}
	for($k=1;$k< count($option_values); $k++)
	{
		if($option_values[$k]!=$option_values[0] )
		{
			echo "
			<option value='$option_values[$k]'>$option_titles[$k]</option>"; 
		}			
	}

	echo '</select>
	</td>
	</tr>'."\n";








?>

 

 

The above is the select code that only pass the option value "1" to the next processing page. I trying to select a date range as you can see on the code. After i use mktime function, the select option only have one. What is the problem with my code here? For the next processing page,

the code look like this:

 

if(isset($Submit))
{
$date_range=$_POST['date_range'];
$dates=explode(':',$date_range);
$date1=$dates[0];
$date2=$dates[1];
   
        
}

I only get the value "1" from the date range POST varibale. If i select option number 2 and so fouth, the nth appear. $date1 and $date2 not working. Can anyone help me? thanks in advanced.