Limiting Array Results

[smajeed]

Hi,

I am working on a bit of code that will read in a directory of images and display the images in a gallery type view. This would be very useful when hundreds of images are involved as the images names are read in and automatically displayed.

What it is currently doing is reading in the filenames from a directory and sticking those names in an array and then the foreach is going throught each array item and display the thumbnail image with a link to the full size version of that image.

Currently my code is looking like this (I have pasted the code into an HTML file to make it easier to look at):

http://xavier.computing.dundee.ac.uk/smajeed/galleryarray.html

What I want to be able to do is somehow limit the array so that if for example the $page variable was set to 1 then it would do the loop for the images held in the first 20 elements and if $page is set to 2 then it does 21-40 and so on so that the page displays 20 images at any time.

I have tried searching on google and php.net for a way to limit this somehow but cant find anything.

Any help will be much appreciated.

Thank You
Shahbaz

[dnszero]

I haven't looked at your code, but instead of a foreach loop, just use a for loop.
A simple alogorithm is all thats needed to set the limits based on $page.

$NumPicsPerPage = 20;

$StartPic = $page * $NumPicsPerPage - $NumPicsPerPage;
$StopPic = $page * $NumPicsPerPage - 1; // -1 cause arrays are zero indexed

foreach($i = $StartPic; $i <= $StopPic; $i++)
{
   DISPLAY_FUNCTION($PictureArray[$i]);
}

[smajeed]

I there, I tried that code and changed the variable name of the array to that of my array and defined the function to call and run the display image bit but I am getting a parse error on this line that has:

foreach($i = $StartPic; $i <= $StopPic; $i++)

So I now have:

function displaypic1 ($first) {

if( $counter == 0 ){
echo("<tr>");}

echo("<td align='middle' valign='bottom' style='border-collapse: collapse; border-left: solid; border-right: solid; border-color: #C0C0C0;'>");

echo('<a href="'.$value.'" target="blank"><img src="Thumbnails/'.$value.'" alt="'.$value.'" border="0"></a>');

echo('<br><br><a href="'.$value.'" target="blank"><font size=-1>'.$value.'</font></a>');

echo("</td>");

$counter++;

if( $counter == 4 ){
echo("</tr><tr><td colspan=4>&nbsp;</td></tr>");
$counter = 0;
}	
}

$NumPicsPerPage = 20; 

$StartPic = $page * $NumPicsPerPage - $NumPicsPerPage; 
$StopPic = $page * $NumPicsPerPage - 1; // -1 cause arrays are zero indexed 

foreach($i = $StartPic; $i <= $StopPic; $i++) 
{ 
   displaypic1($filelist[$i]); 
}

I have no idea as to what the error is! Any ideas?

Shahbaz

[dnszero]

Sorry, that line should've been "for" not "foreach"

[smajeed]

Many Thanks

Its working now!

Shahbaz