Простой скрипт pagination PHP

Это сочетание HTML и кода, но оно довольно простое, легко понять и должно быть достаточно простым для развязки в соответствии с вашими потребностями, я думаю.

try { // Find out how many items are in the table $total = $dbh->query(' SELECT COUNT(*) FROM table ')->fetchColumn(); // How many items to list per page $limit = 20; // How many pages will there be $pages = ceil($total / $limit); // What page are we currently on? $page = min($pages, filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT, array( 'options' => array( 'default' => 1, 'min_range' => 1, ), ))); // Calculate the offset for the query $offset = ($page - 1) * $limit; // Some information to display to the user $start = $offset + 1; $end = min(($offset + $limit), $total); // The "back" link $prevlink = ($page > 1) ? '<a href="?page=1" title="First page">&laquo;</a> <a href="?page=' . ($page - 1) . '" title="Previous page">&lsaquo;</a>' : '<span class="disabled">&laquo;</span> <span class="disabled">&lsaquo;</span>'; // The "forward" link $nextlink = ($page < $pages) ? '<a href="?page=' . ($page + 1) . '" title="Next page">&rsaquo;</a> <a href="?page=' . $pages . '" title="Last page">&raquo;</a>' : '<span class="disabled">&rsaquo;</span> <span class="disabled">&raquo;</span>'; // Display the paging information echo '<div id="paging"><p>', $prevlink, ' Page ', $page, ' of ', $pages, ' pages, displaying ', $start, '-', $end, ' of ', $total, ' results ', $nextlink, ' </p></div>'; // Prepare the paged query $stmt = $dbh->prepare(' SELECT * FROM table ORDER BY name LIMIT :limit OFFSET :offset '); // Bind the query params $stmt->bindParam(':limit', $limit, PDO::PARAM_INT); $stmt->bindParam(':offset', $offset, PDO::PARAM_INT); $stmt->execute(); // Do we have any results? if ($stmt->rowCount() > 0) { // Define how we want to fetch the results $stmt->setFetchMode(PDO::FETCH_ASSOC); $iterator = new IteratorIterator($stmt); // Display the results foreach ($iterator as $row) { echo '<p>', $row['name'], '</p>'; } } else { echo '<p>No results could be displayed.</p>'; } } catch (Exception $e) { echo '<p>', $e->getMessage(), '</p>'; } 

Некоторые из обучающих программ, которые я нашел, которые легко понять:

• http://www.phpfreaks.com/tutorial/basic-pagination

Это делает более разумным разбить ваш список на куски размером с страницу и запрашивать только одну базу данных за один раз. Это значительно сокращает время обработки сервера и время загрузки страницы, а также дает пользователю меньшие фрагменты информации для переваривания, поэтому он не задыхается от того, что дерьмо вы пытаетесь его накормить. Действие этого называется разбиением на страницы.

Основная процедура разбивки на страницы выглядит длинной и страшной вначале, но как только вы закрываете глаза, сделайте глубокий вдох и посмотрите на каждую часть сценария по отдельности, вы обнаружите, что на самом деле это довольно простой материал

Сценарий:

 // find out how many rows are in the table $sql = "SELECT COUNT(*) FROM numbers"; $result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR); $r = mysql_fetch_row($result); $numrows = $r[0]; // number of rows to show per page $rowsperpage = 10; // find out total pages $totalpages = ceil($numrows / $rowsperpage); // get the current page or set a default if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) { // cast var as int $currentpage = (int) $_GET['currentpage']; } else { // default page num $currentpage = 1; } // end if // if current page is greater than total pages... if ($currentpage > $totalpages) { // set current page to last page $currentpage = $totalpages; } // end if // if current page is less than first page... if ($currentpage < 1) { // set current page to first page $currentpage = 1; } // end if // the offset of the list, based on current page $offset = ($currentpage - 1) * $rowsperpage; // get the info from the db $sql = "SELECT id, number FROM numbers LIMIT $offset, $rowsperpage"; $result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR); // while there are rows to be fetched... while ($list = mysql_fetch_assoc($result)) { // echo data echo $list['id'] . " : " . $list['number'] . "<br />"; } // end while /****** build the pagination links ******/ // range of num links to show $range = 3; // if not on page 1, don't show back links if ($currentpage > 1) { // show << link to go back to page 1 echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=1'><<</a> "; // get previous page num $prevpage = $currentpage - 1; // show < link to go back to 1 page echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$prevpage'><</a> "; } // end if // loop to show links to range of pages around current page for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) { // if it's a valid page number... if (($x > 0) && ($x <= $totalpages)) { // if we're on current page... if ($x == $currentpage) { // 'highlight' it but don't make a link echo " [<b>$x</b>] "; // if not current page... } else { // make it a link echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$x'>$x</a> "; } // end else } // end if } // end for // if not on last page, show forward and last page links if ($currentpage != $totalpages) { // get next page $nextpage = $currentpage + 1; // echo forward link for next page echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$nextpage'>></a> "; // echo forward link for lastpage echo " <a href='{$_SERVER['PHP_SELF']}?currentpage=$totalpages'>>></a> "; } // end if /****** end build pagination links ******/ ?> 

• http://www.tonymarston.net/php-mysql/pagination.html

Этот учебник предназначен для разработчиков, которые хотят дать своим пользователям возможность проходить через большое количество строк базы данных в управляемых кусках вместо целой партии за один раз.

  <?php // Custom PHP MySQL Pagination Tutorial and Script // You have to put your mysql connection data and alter the SQL queries(both queries) mysql_connect("DATABASE_Host_Here","DATABASE_Username_Here","DATABASE_Password_Here") or die (mysql_error()); mysql_select_db("DATABASE_Name_Here") or die (mysql_error()); ////////////// QUERY THE MEMBER DATA INITIALLY LIKE YOU NORMALLY WOULD $sql = mysql_query("SELECT id, firstname, country FROM myTable ORDER BY id ASC"); //////////////////////////////////// Pagination Logic //////////////////////////////////////////////////////////////////////// $nr = mysql_num_rows($sql); // Get total of Num rows from the database query if (isset($_GET['pn'])) { // Get pn from URL vars if it is present $pn = preg_replace('#[^0-9]#i', '', $_GET['pn']); // filter everything but numbers for security(new) //$pn = ereg_replace("[^0-9]", "", $_GET['pn']); // filter everything but numbers for security(deprecated) } else { // If the pn URL variable is not present force it to be value of page number 1 $pn = 1; } //This is where we set how many database items to show on each page $itemsPerPage = 10; // Get the value of the last page in the pagination result set $lastPage = ceil($nr / $itemsPerPage); // Be sure URL variable $pn(page number) is no lower than page 1 and no higher than $lastpage if ($pn < 1) { // If it is less than 1 $pn = 1; // force if to be 1 } else if ($pn > $lastPage) { // if it is greater than $lastpage $pn = $lastPage; // force it to be $lastpage's value } // This creates the numbers to click in between the next and back buttons // This section is explained well in the video that accompanies this script $centerPages = ""; $sub1 = $pn - 1; $sub2 = $pn - 2; $add1 = $pn + 1; $add2 = $pn + 2; if ($pn == 1) { $centerPages .= '&nbsp; <span class="pagNumActive">' . $pn . '</span> &nbsp;'; $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add1 . '">' . $add1 . '</a> &nbsp;'; } else if ($pn == $lastPage) { $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub1 . '">' . $sub1 . '</a> &nbsp;'; $centerPages .= '&nbsp; <span class="pagNumActive">' . $pn . '</span> &nbsp;'; } else if ($pn > 2 && $pn < ($lastPage - 1)) { $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub2 . '">' . $sub2 . '</a> &nbsp;'; $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub1 . '">' . $sub1 . '</a> &nbsp;'; $centerPages .= '&nbsp; <span class="pagNumActive">' . $pn . '</span> &nbsp;'; $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add1 . '">' . $add1 . '</a> &nbsp;'; $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add2 . '">' . $add2 . '</a> &nbsp;'; } else if ($pn > 1 && $pn < $lastPage) { $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $sub1 . '">' . $sub1 . '</a> &nbsp;'; $centerPages .= '&nbsp; <span class="pagNumActive">' . $pn . '</span> &nbsp;'; $centerPages .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $add1 . '">' . $add1 . '</a> &nbsp;'; } // This line sets the "LIMIT" range... the 2 values we place to choose a range of rows from database in our query $limit = 'LIMIT ' .($pn - 1) * $itemsPerPage .',' .$itemsPerPage; // Now we are going to run the same query as above but this time add $limit onto the end of the SQL syntax // $sql2 is what we will use to fuel our while loop statement below $sql2 = mysql_query("SELECT id, firstname, country FROM myTable ORDER BY id ASC $limit"); //////////////////////////////// END Pagination Logic //////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////// Pagination Display Setup ///////////////////////////////////////////////////////////////////// $paginationDisplay = ""; // Initialize the pagination output variable // This code runs only if the last page variable is ot equal to 1, if it is only 1 page we require no paginated links to display if ($lastPage != "1"){ // This shows the user what page they are on, and the total number of pages $paginationDisplay .= 'Page <strong>' . $pn . '</strong> of ' . $lastPage. '&nbsp; &nbsp; &nbsp; '; // If we are not on page 1 we can place the Back button if ($pn != 1) { $previous = $pn - 1; $paginationDisplay .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $previous . '"> Back</a> '; } // Lay in the clickable numbers display here between the Back and Next links $paginationDisplay .= '<span class="paginationNumbers">' . $centerPages . '</span>'; // If we are not on the very last page we can place the Next button if ($pn != $lastPage) { $nextPage = $pn + 1; $paginationDisplay .= '&nbsp; <a href="' . $_SERVER['PHP_SELF'] . '?pn=' . $nextPage . '"> Next</a> '; } } ///////////////////////////////////// END Pagination Display Setup /////////////////////////////////////////////////////////////////////////// // Build the Output Section Here $outputList = ''; while($row = mysql_fetch_array($sql2)){ $id = $row["id"]; $firstname = $row["firstname"]; $country = $row["country"]; $outputList .= '<h1>' . $firstname . '</h1><h2>' . $country . ' </h2><hr />'; } // close while loop ?> <html> <head> <title>Simple Pagination</title> </head> <body> <div style="margin-left:64px; margin-right:64px;"> <h2>Total Items: <?php echo $nr; ?></h2> </div> <div style="margin-left:58px; margin-right:58px; padding:6px; background-color:#FFF; border:#999 1px solid;"><?php echo $paginationDisplay; ?></div> <div style="margin-left:64px; margin-right:64px;"><?php print "$outputList"; ?></div> <div style="margin-left:58px; margin-right:58px; padding:6px; background-color:#FFF; border:#999 1px solid;"><?php echo $paginationDisplay; ?></div> </body> </html>