PHP MySQL Database multi filtration - php

Question

So I have a table with a whole load of properties and have displayed them on a webpage. As we have a wide range I developed a filtration system. However when used you can only select one tag, but we want to devise it in a way so that you can select one tag and then another. My current code is as follows.
<h3>Advanced Search:</h3>
<table>
<tr>
<td colspan="2" style="vertical-align: top; width:50%; !important;">
<h3>Location</h3>
<div>
Alsancak
Karsiyaka
Lapta
Kayalar
Sadrazamkoy
Cambeli
Baspinar
<!--
-->
</div>
</td>
<td style="vertical-align: top; width:25%;">
<h3>Number of Bedrooms</h3>
<div>
1
2
3
4
</div>
</td>
And it goes on with another few options the code then on the page is as follows:
<h1>Properties</h1>
<?php
$loc = $_GET["loc"];
$con = mysql_connect("localhost","Username","Password");
mysql_selectdb("db",$con);
$sql = "SELECT * FROM Properties WHERE Location='$loc' ORDER BY `Properties`.`Price` ASC";
$mydata = mysql_query($sql,$con);
echo "<h4>Location:" . $loc . "</h4><br>";
while($record = mysql_fetch_array($mydata)){
echo "<div id=\"property\">" . "<img src=\"images/" . $record['MainPic'] . "\" id=\"propimg\" align=\"left\">" . "<div id=\"text\" style=\"text-align: center; margin-right:20px;\"><h2>" . $record['Title'] . "</h2>" . $record['Ref'] . "<br/>" . "£" . $record['Price'] . "<br/>" . $record['Location'] . "<br/>" . "Details</div>" . "<img src=\"images/bottom-line.png\" id=\"bottomline\"></div>" . "</div>" ;
}
mysql_close($con);
?>
Any help would be greatly received. Thanks in advance!

Answer 1

I would suggest using the same page for displaying the results, whether the filter applies to the location or the number of bedrooms. You can always use WHERE (1 = 1) in your SQL so that you can append AND (Location='$loc') or AND (Beds='$bed'), though it would be preferable to use parameters.
Once you have that set up, you can modify your links. Let's say your destination page is webproperty.php. Store that URL in a variable $urlDest.
When you generate your links for filtering by location, add any variables in $_GET that aren't loc to the end of $urlDest, getting something like webproperty.php?bed=2. As you iterate through your locations, append the loc variable to $urlDest, like "<a href=\"$urlDest&loc=$loc\">".
Similarly, when you generate your links for filtering by bedroom count, add any variables in $_GET that aren't bed to the end of $urlDest, getting something like webproperty.php?loc=Alsancak. As you iterate through your bedroom counts, append the bed variable to $urlDest, like "<a href=\"$urlDest&bed=$bed\">".