Simple Web Page Navigation 'Previous Next' Php

0
votes

I have 3 (.php) files/pages for a website (in a folder), I have Previous/Next Links displayed on the bottom of each. What php code on the previous/next link, would help me navigate to the next page.

For Example:

Lets say the pages are Page1.php, Page2.php, Page3.php, and I am currently on Page2.php.

If I want to click on the 'Previous' Link, I want Page1.php to be displayed.

If I click on 'Next' then I want Page3.php to be displayed.

I believe this is called 'pagination'?

Previous

Next

I dont know if this is possible. And I hope I have been clear with describing the problem.

Thanks,

babsdoc

2
phpwebpaginationjquery-pagination
Are there only ever going to be 3 pages? Or might you add more later and need to manage a next based on current page, rather than just if page is 2 next = 3 and previous = 1? – James
Yes James. I might add pages later. Which is why I need some code to seek the previous and next pages. – babsdoc
@babsdoc Here are a few tutorials on doing pagination: net.tutsplus.com/tutorials/php/how-to-paginate-data-with-php and phpeasystep.com/phptu/29.html and phpfreaks.com/tutorial/basic-pagination and forum.codecall.net/topic/50803-simple-pagination and psoug.org/snippet/PHP-Pagination-Example-1_24.htm – Funk Forty Niner
Thanks Fred. Interesting. But I don't plan on using a database (mysql etc.). I just want the code to get the next and previous file in the folder (I am assuming Alphabetical sorting would be default). – babsdoc
@babsdoc You're welcome. However, this will prove to be rather difficult without using a DB, unless you find code that will do it using the scandir and glob functions. What have you tried? – Funk Forty Niner

2 Answers

0
votes
Here is the original code @Fred 

$images = "jars/"; # Location of small versions

$big    = "samp2/"; # Location of big versions (assumed to be a subdir of above)

$cols   = 2; # Number of columns to display

if ($handle = opendir($images)) {
   while (false !== ($file = readdir($handle))) {
       if ($file != "." && $file != ".." && $file != "samp2" && $file != "Thumbs.db") {
           $files[] = $file;
       }
   }
   closedir($handle);
}

foreach($files as $file)
{
$pc="Product Code:".substr($file,0,-4);

<a href=\"$images$big$file\" class=\"swap\"><img src=$images$file title=\"title\"
width=\"100\" height=\"100\">
$pc</a></li>";
}
0
votes

Providing you're going to keep a sane naming convention throughout (ie pageX.php), then the following should suffice. (might not be the ideal solution for you but gives you an idea. Can be put in a function/changes made, etc)

$strCurrentPage = basename($_SERVER['REQUEST_URI']);

$strPattern = '/\d+/';
preg_match($strPattern, $strCurrentPage, $strGetPageNumber); // extract numerical value

//set two new vars to same as page number, increment one and subtract one
$strNextPageNum = $strGetPageNumber[0];
$strPreviousPageNum = $strGetPageNumber[0];
$strNextPageNum++;
$strPreviousPageNum--;

//set full filename with new numbers
$strNextPage = 'page'.$strNextPageNum.'.php';
$strPreviousPage = 'page'.$strPreviousPageNum.'.php';


//if file is found then show link
//next page
if (file_exists($strNextPage))
  {
    echo '<a href="'.$strNextPage.'">Next Page</a>';
  }
else
  {
    echo "No more pages";
  }

//previous page
if (file_exists($strPreviousPage))
  {
    echo '<a href="'.$strPreviousPage.'">Previous Page</a>';
  }
else
  {
    echo "No previous pages";
  }