Photo gallery with next previous navigation in phpBuild a photo gallery with next previous navigation system.
As PHPJavascript.com is all about dynamic websites, my script is written in PHP (PHP is my best friend in the world of programming).
<?
$total=5;
if(isset($_REQUEST["i"]))
$i=$_REQUEST["i"]; else $i=1;
$next=$i+1; $previous=$i-1;
?>
<? if($previous>0) {?> <a href="photogallery.php?&i=<? echo $previous;?>">Previous</a> <? } ?>
<img src="<?echo $i?>.jpg">
<? if($next<=$total) { ?> <a href="photogallery.php?&i=<? echo $next;?>">Next</a> <? } ?>
1. First make a folder and save lets say 5 images in it. Name the images 1.jpg, 2.jpg, 3.jpg, 4.jpg and 5.jpg respectively
2. declare $total=5 where 5 is the no of images you have
3. declare $i value. if $i value is already set than get that value else make $i=1
if(isset($_REQUEST["i"])) $i=$_REQUEST["i"]; else $i=1;
4. declare img tag <img src=<?echo $i?>.jpg> where $i stores the name of the image followed by the extension ".jpg"
5. Now for next previous navigation declare variables $previous and $next. $next=$i+1; $previous=$i-1;
6. Add previous and next link around the image tag with validation.
<? if($previous>0) {?> <a href="photogallery.php?&i=<? echo $previous;?>">Previous[/url] <? } ?>
<img src="<?echo $i?>.jpg">
<? if($next<=$total) { ?> <a href="photogallery.php?&i=<? echo $next;?>">Next[/url] <? } ?>
7. We are using url to transfer the value of $i
(photogallery.php?&i=<? echo $next;?>) 8. if $previous value is less than 0 than remove previous link and if next value is more than the total no of images than remove next link
9. Hope that was easy to understand and implement
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