Pixel Home Page - I have a problem..

[adamjblakey]

Hi,

 

I have a site here: ukadulthomepage(dot)co.uk/index.php?verify=true

 

Which functions fine apart from when i add a pixel i can add another one over the top of this which should not happen.

 

Here is the code for the site for when a block is chosen, but i need it to check some where in here that it is not covering an existing block.

 

<?php

$posx = $_GET[x];
$posy = $_GET[y];

$startx = 0;
$endx = 0;
$starty = 0;
$endy = 0;

if ($_GET[ox] > $posx) {
$startx = $posx;
$endx = $_GET[ox];
} else {
$startx = $_GET[ox];
$endx = $posx;
}

if ($_GET[oy] > $posy) {
$starty = $posy;
$endy = $_GET[oy];
} else {
$starty = $_GET[oy];
$endy = $posy;
}

$width = ((($endx+1) - $startx)*10);
$height = ((($endy+1) - $starty)*10);

$totblocks = (($endx+1) - $startx) * (($endy+1) - $starty);

$price = $totblocks * 4;

?>

 

 

Thank you in advance for you help.

 

Adam

[adamjblakey]

Sorry i should have mentioned how the existing entries are stored. I am using an XML database. And is stored like this:

 

<?xml version="1.0" encoding="UTF-8"?>
<news>

<item>
	<id>1</id>
	<user>1185868374</user>
	<posx>16</posx>
	<posy>8</posy>
	<image>1.noimage.JPG</image>
	<link>http://www.test.com</link>
	<alt>Test</alt>
	<w>10</w>
	<h>10</h>
</item>

</news>

 

Cheers