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Pagination MySQLi Google Style Paged Results Tutorial

Learn to script pagination for PHP and MySQLi based applications. Use pagination programming when your database table has a lot of rows and you do not want all results to render on a single page. Watch the video for line by line explanation of the script and more commentary. <?php // Script and tutorial written by Adam Khoury @ developphp.com // Line by line explanation : youtube.com/watch?v=T2QFNu_mivw include_once("mysqli_connection.php"); // This first query is just to get the total count of rows $sql = "SELECT COUNT(id) FROM testimonials WHERE approved='1'"; $query = mysqli_query($db_conx, $sql); $row = mysqli_fetch_row($query); // Here we have the total row count $rows = $row[0]; // This is the number of results we want displayed per page $page_rows = 10; // This tells us the page number of our last page $last = ceil($rows/$page_rows); // This makes sure $last cannot be less than 1 if($last < 1){ $last = 1; } // Establish the $pagenum variable $pagenum = 1; // Get pagenum from URL vars if it is present, else it is = 1 if(isset($_GET['pn'])){ $pagenum = preg_replace('#[^0-9]#', '', $_GET['pn']); } // This makes sure the page number isn't below 1, or more than our $last page if ($pagenum < 1) { $pagenum = 1; } else if ($pagenum > $last) { $pagenum = $last; } // This sets the range of rows to query for the chosen $pagenum $limit = 'LIMIT ' .($pagenum - 1) * $page_rows .',' .$page_rows; // This is your query again, it is for grabbing just one page worth of rows by applying $limit $sql = "SELECT id, firstname, lastname, datemade FROM testimonials WHERE approved='1' ORDER BY id DESC $limit"; $query = mysqli_query($db_conx, $sql); // This shows the user what page they are on, and the total number of pages $textline1 = "Testimonials (<b>$rows</b>)"; $textline2 = "Page <b>$pagenum</b> of <b>$last</b>"; // Establish the $paginationCtrls variable $paginationCtrls = ''; // If there is more than 1 page worth of results if($last != 1){ /* First we check if we are on page one. If we are then we don't need a link to the previous page or the first page so we do nothing. If we aren't then we generate links to the first page, and to the previous page. */ if ($pagenum > 1) { $previous = $pagenum - 1; $paginationCtrls .= '<a href="'.$_SERVER['PHP_SELF'].'?pn='.$previous.'">Previous</a> &nbsp; &nbsp; '; // Render clickable number links that should appear on the left of the target page number for($i = $pagenum-4; $i < $pagenum; $i++){ if($i > 0){ $paginationCtrls .= '<a href="'.$_SERVER['PHP_SELF'].'?pn='.$i.'">'.$i.'</a> &nbsp; '; } } } // Render the target page number, but without it being a link $paginationCtrls .= ''.$pagenum.' &nbsp; '; // Render clickable number links that should appear on the right of the target page number for($i = $pagenum+1; $i <= $last; $i++){ $paginationCtrls .= '<a href="'.$_SERVER['PHP_SELF'].'?pn='.$i.'">'.$i.'</a> &nbsp; '; if($i >= $pagenum+4){ break; } } // This does the same as above, only checking if we are on the last page, and then generating the "Next" if ($pagenum != $last) { $next = $pagenum + 1; $paginationCtrls .= ' &nbsp; &nbsp; <a href="'.$_SERVER['PHP_SELF'].'?pn='.$next.'">Next</a> '; } } $list = ''; while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){ $id = $row["id"]; $firstname = $row["firstname"]; $lastname = $row["lastname"]; $datemade = $row["datemade"]; $datemade = strftime("%b %d, %Y", strtotime($datemade)); $list .= '<p><a href="testimonial.php?id='.$id.'">'.$firstname.' '.$lastname.' Testimonial</a> - Click the link to view this testimonial<br>Written '.$datemade.'</p>'; } // Close your database connection mysqli_close($db_conx); ?> <!DOCTYPE html> <html> <head> <style type="text/css"> body{ font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;} div#pagination_controls{font-size:21px;} div#pagination_controls > a{ color:#06F; } div#pagination_controls > a:visited{ color:#06F; } </style> </head> <body> <div> <h2><?php echo $textline1; ?> Paged</h2> <p><?php echo $textline2; ?></p> <p><?php echo $list; ?></p> <div id="pagination_controls"><?php echo $paginationCtrls; ?></div> </div> </body> </html>
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