Relating PHP to source files - php

Question

Sorry if the title is a bit vague, couldn't think of a better way to phrase it, anyway.
I'm attempting to make a page system for a website. Where you predictably start on page one, and then click page two and a different set of images appear. Each page has 12 images which are all thumbnail images. You click on the thumbnail image and lightbox brings up the high res shot.
My current problem is that I cannot link the PHP script to the images correctly. To me it looks correct but it doesn't work, so clearly not.
Info:
Thumbnails are name "thumb1.jpg" from 1-24, full images are name "img1.jpg" from 1-24
<?php
$imgs = array(12, 12, );
if(!empty($_GET["page"]))
{
$currPage = $_GET["page"];
}
else
{
$currPage = 1;
}
for($i = 1; $i<$imgs[$currPage-1]+1;$i++)
{
echo "<a href='albums/norfolk weekender 2012/img'.$imgs[$currPage][$i].'.jpg' rel='lightbox[group]'><img src='albums/norfolk weekender 2012/thumb'.$imgs[$currPage][$i].'.jpg'/></a>";
}
?>
.
Anyway, I'm unsure why it doesn't work, and any help will be much appreciated.
Ta.
John.

Answer 1

'.$imgs[$currPage][$i].'
It looks like you should be using " instead of ' to wrap round this embedded variable both times you reference it in the code, since your echo is distinguished by ".
Either way, looking at this it doesn't seem this array structure you've got going on is working.
"albums/norfolk weekender 2012/img".$imgs[$currPage][$i].".jpg"
Have you not considered something like this (care, it's rough); with $pageNo representing $_GET["page"]
for ( $i = ($pageNo - 1) * 12 + 1; $i <= ($pageNo * 12); $i++ )
{
echo "<a href='albums/norfolk weekender 2012/img".$i.".jpg' rel='lightbox[group]'><img src='albums/norfolk weekender 2012/thumb".$i.".jpg'/></a>";
}
If presentation (i.e. checking to see if an image exists before displaying it) is a major concern, you could use file_exists( filename ). By creating an Array like this...
$imgs = array(12, 12, );
...you are simply creating an array containing two elements of 12 (and possibly a blank element, I'm not entirely sure.) I think where you went wrong is you attempted to declare the size in the "constructor" of Array; in PHP this is not the case.