* @version 2.4.7 (last revision: January 16, 2024) * @copyright © 2009 - 2024 Stefan Gabos * @license https://www.gnu.org/licenses/lgpl-3.0.txt GNU LESSER GENERAL PUBLIC LICENSE * @package Zebra_Pagination */ class Zebra_Pagination { /** * defaults and initialize some private variables * * @var array * @access private */ private $_properties = array( // should the "previous page" and "next page" links be always visible 'always_show_navigation' => true, // should we avoid duplicate content 'avoid_duplicate_content' => true, // whether pagination links should be removed leaving only the next and previous buttons, // links to the first and last pages, as well as a label showing the current page and // the total available pages // if set to 1 will also remove the links to the first and last page 'condensed' => false, // in condensed mode, the string indicating the current page 'condensed_progress' => '%d / %d', // CSS classes to assign to the list, list item and to the anchor 'css_classes' => array( 'list' => 'pagination', 'list_item' => 'page-item', 'anchor' => 'page-link', ), // default method for page propagation 'method' => 'get', // string for "next page" 'next' => '»', // by default, prefix page number with zeros 'padding' => true, // the default starting page 'page' => 1, // a flag telling whether current page was set manually or determined from the URL 'page_set' => false, // where should the "next" / "previous" links should be placed, relative to the navigation links 'navigation_position' => 'outside', // a flag telling whether query strings in base_url should be kept or not 'preserve_query_string' => 0, // string for "previous page" 'previous' => '«', // by default, we assume there are no records // we expect this number to be set after the class is instantiated 'records' => 0, // records per page 'records_per_page' => 0, // should the links be displayed in reverse order 'reverse' => false, // number of selectable pages 'selectable_pages' => 11, // will be computed later on 'total_pages' => 0, // trailing slashes are added to generated URLs // (when "method" is "url") 'trailing_slash' => true, // this is the variable name to be used in the URL for propagating the page number 'variable_name' => 'page', ); /** * Constructor of the class. * * Initializes the class and the default properties. * * @return void */ public function __construct() { // set the default base url $this->base_url(); } /** * By default, the *previous page* and *next page* links are always shown. * * By disabling this feature, the *previous page* and *next page* links will only be shown if there are more pages * than {@link selectable_pages selectable pages}. * * * // show "previous page" / "next page" only if there are more pages * // than there are selectable pages * $pagination->always_show_navigation(false); * * * @param boolean $status (Optional) If set to `FALSE`, the *previous page* and *next page* links will only be * shown if there are more pages than {@link selectable_pages selectable pages}. * * Default is `TRUE`. * * @since 2.0 * * @return void */ public function always_show_navigation($status = true) { // set property $this->_properties['always_show_navigation'] = $status; } /** * From a search engine's point of view URL `https://www.mywebsite.com/list` points to a different place than where * `https://www.mywebsite.com/list?page=1` points to (because of the added query string in the second URL), but because * both have the same content, your page will get an SEO penalization. * * In order to avoid this, the library will have for the first page (or last, if you are displaying links in {@link reverse} * order) the same path as you have for when you are accessing the page for the first (un-paginated) time. * * If you want to disable this behavior call this method with its argument set to `FALSE`. * * * // don't avoid duplicate content * $pagination->avoid_duplicate_content(false); * * * @param boolean $status (Optional) If set to `FALSE`, the library will have for the first page (or last, * if you are displaying links in {@link reverse} order) a different path than the * one you have when you are accessing the page for the first (un-paginated) time. * * Default is `TRUE`. * * @return void * * @since 2.0 */ public function avoid_duplicate_content($status = true) { // set property $this->_properties['avoid_duplicate_content'] = $status; } /** * The base URL to be used when generating the navigation links. * * This is helpful for the case when the URL where the records are paginated may have parameters that are not needed * for subsequent requests generated by pagination. * * For example, suppose some records are paginated at `https://yourwebsite/mypage/`. When a record from the list is * updated, the URL could become something like `https://youwebsite/mypage/?action=updated`. Based on the value of * `action` a message would be shown to the user. * * Because of the way this script works, the pagination links would become * * `https://youwebsite/mypage/?action=updated&page=[page number]` * * when {@link method} is `get` and {@link variable_name} is `page` * * `https://youwebsite/mypage/page[page number]/?action=updated` * * when {@link method} is `url` and {@link variable_name} is `page` * * As a result, whenever the user would paginate, the message would be shown to him again and again because * `action` will be preserved in the URL! * * The solution is to set the `base_url` to `https://youwebsite/mypage/` and in this way, regardless of how the URL * changes, the pagination links will always be in the form of * * `https://youwebsite/mypage/?page=[page number]` * * when {@link method} is `get` and {@link variable_name} is `page` * * `https://youwebsite/mypage/page[page number]/` * * when {@link method} is `url` and {@link variable_name} is `page` * * Of course, you may still have query strings in the value of the `base_url` if you wish so, and these will be * preserved when paginating. * * > If you need to preserve the hash in the URL, make sure to include the zebra_pagination.js file in your page! * * @param string $base_url (Optional) The base URL to be used when generating the navigation * links * * Defaults is whatever returned by * {@link https://www.php.net/manual/en/reserved.variables.server.php $_SERVER['REQUEST_URI']} * * @param boolean $preserve_query_string (Optional) Indicates whether values in query strings, other than * those set in `base_url`, should be preserved * * Default is `TRUE` * * @return void */ public function base_url($base_url = '', $preserve_query_string = true) { // we'll need this in case "variable_name" is an empty string // (when "base_url" must be explicitly declared) $this->_properties['base_url_explicit'] = $base_url !== ''; // set the base URL $base_url = ($base_url == '' ? $_SERVER['REQUEST_URI'] : $base_url); // parse the URL $parsed_url = parse_url($base_url); // cache the "path" part of the URL (that is, everything *before* the "?") $this->_properties['base_url'] = rtrim($parsed_url['path'], '/'); // cache the "query" part of the URL (that is, everything *after* the "?") $this->_properties['base_url_query'] = isset($parsed_url['query']) ? $parsed_url['query'] : ''; // store query string as an associative array parse_str($this->_properties['base_url_query'], $this->_properties['base_url_query']); // should query strings (other than those set in $base_url) be preserved? $this->_properties['preserve_query_string'] = $preserve_query_string; } /** * Removes pagination links leaving only the *next* and *previous* buttons, links to the *first* and *last* pages, * as well as a label showing the current page and the total available pages. * * > Setting {@link selectable_pages selectable pages} to a value lower than `5` will automatically turn * {@link condensed} mode on. * * @param boolean $extra_condensed Turning *extra condensed* mode on will also remove the links to the first * and last pages. * * Default is `FALSE`. * * @since 2.4.0 * * @return void */ public function condensed($extra_condensed = false) { $this->_properties['condensed'] = $extra_condensed ? true : 1; } /** * Allows defining of custom CSS class names to be applied to the HTML markup. * * @param array $css_classes An associative array with one or more or all of the following keys: * * - **list**, for setting the CSS class name to be used for the ordered list (`
    `) * - **list_item**, for setting the CSS class name to be used for the list item (`
  1. `) * - **anchor**, for setting the CSS class name to be used for the anchor (``) * * The default generated HTML markup looks like below: * * *
    *
      *
    1. * 1 *
      2. *
    2. * 2 *
      3. * ...the other pages... *
    *
    *     * * Calling this method with the following argument... * * * $pagination->css_classes(array( * 'list' => 'foo', * 'list_item' => 'bar', * 'anchor' => 'baz', * )); * * * ...would result in the following markup: * * *
    *
      *
    1. * 1 *
      2. *
    2. * 2 *
      3. * ...the other pages... *
    *
    *     * * Default values are: * * * $pagination->css_classes(array( * 'list' => 'pagination', * 'list_item' => 'page-item', * 'anchor' => 'page-link', * )); * * * These values make the resulting markup to be compatible with versions 3, * 4 and 5 of Twitter Bootstrap. * * @return void */ public function css_classes($css_classes) { // if argument is invalid if (!is_array($css_classes) || empty($css_classes) || array_keys($css_classes) != array_filter(array_keys($css_classes), function ($value) { return in_array($value, array('list', 'list_item', 'anchor'), true); })) { // stop execution trigger_error('Invalid argument. Method classes() accepts as argument an associative array with one or more of the following keys: list, list_item, anchor', E_USER_ERROR); } // merge values with the default ones $this->_properties['css_classes'] = array_merge($this->_properties['css_classes'], $css_classes); } /** * Returns the number of the currently selected page. * * * // echoes the current page * echo $pagination->get_page(); * * * @return int Return the number of the currently selected page */ public function get_page() { // unless page was not specifically set through the "set_page" method if (!$this->_properties['page_set']) { // if if ( // page propagation is SEO friendly $this->_properties['method'] == 'url' && // the current page is set in the URL preg_match('/\b' . str_replace('/', '\/', preg_quote(($this->_properties['variable_name'] === '' ? $this->_properties['base_url'] . '/' : '') . $this->_properties['variable_name'])) . '([0-9]+)\b/i', $_SERVER['REQUEST_URI'], $matches) > 0 ) { // set the current page to whatever it is indicated in the URL $this->set_page((int)$matches[1]); // if page propagation is done through GET and the current page is set in $_GET } elseif (isset($_GET[$this->_properties['variable_name']])) { // set the current page to whatever it was set to $this->set_page((int)$_GET[$this->_properties['variable_name']]); } } // if showing records in reverse order we must know the total number of records and the number of records per page // *before* calling the "get_page" method if ($this->_properties['reverse'] && $this->_properties['records'] == '') { trigger_error('When showing records in reverse order you must specify the total number of records (by calling the "records" method) *before* the first use of the "get_page" method!', E_USER_ERROR); } elseif ($this->_properties['reverse'] && $this->_properties['records_per_page'] == '') { trigger_error('When showing records in reverse order you must specify the number of records per page (by calling the "records_per_page" method) *before* the first use of the "get_page" method!', E_USER_ERROR); } // get the total number of pages $this->_properties['total_pages'] = $this->get_pages(); // if there are any pages if ($this->_properties['total_pages'] > 0) { // if current page is beyond the total number pages /// make the current page be the last page if ($this->_properties['page'] > $this->_properties['total_pages']) { $this->_properties['page'] = $this->_properties['total_pages']; // if current page is smaller than 1 // make the current page 1 } elseif ($this->_properties['page'] < 1) { $this->_properties['page'] = 1; } } // if we're just starting and we have to display links in reverse order // set the first to the last one rather then first if (!$this->_properties['page_set'] && $this->_properties['reverse']) { $this->set_page($this->_properties['total_pages']); } // return the current page return (int)$this->_properties['page']; } /** * Returns the total number of available pages. * * The value is computed based on the {@link records() total number of records} and the {@link records_per_page() number of records to be shown per page}. * * * // get the total number of pages * echo $pagination->get_pages(); * * * @return int The total number of available pages * * @since 2.1 */ public function get_pages() { // return the total number of pages based on the total number of records and number of records to be shown per page return $this->_properties['records_per_page'] > 0 ? ceil($this->_properties['records'] / $this->_properties['records_per_page']) : 0; } /** * Change the labels for the *previous page* and *next page* links as well as the label used to indicate progress * when in {@link condensed} mode. * * * // change the default labels * $pagination->labels('Previous', 'Next', 'Page %d of %d pages'); * * * @param string $previous (Optional) The label for the *previous page* link. * * Default is `«` (which looks like `«`) * * @param string $next (Optional) The label for the *next page* link. * * Default is `»` (which looks like `»`). * * @param string $progress (Optional) The label for showing the current progress when in {@link condensed} mode. * * Default is `%d / %d` * * First `%d` will be replaced with the current page while the second one with the * number of total pages. * * @return void * * @since 2.0 */ public function labels($previous = '«', $next = '»', $progress = '%d / %d') { // set the labels $this->_properties['previous'] = $previous; $this->_properties['next'] = $next; $this->_properties['condensed_progress'] = $progress; } /** * Sets the method to be used for page propagation. * * * // set the method to the SEO friendly way * $pagination->method('url'); * * * @param string $method (Optional) The method to be used for page propagation. * * Valid values are: * * - `url` - page propagation is done in a SEO friendly way * * This method requires the {@link https://httpd.apache.org/docs/current/mod/mod_rewrite.html mod_rewrite} * module to be enabled on your Apache server (or the equivalent for other web servers). * * When using this method, the current page will be passed in the URL as * * `https://youwebsite.com/yourpage/[variable name][page number]/` * * where `variable name` is set through {@link variable_name} and `page number` * represents the current page. * * - `get` - page propagation is done through `GET` * * When using this method, the current page will be passed in the URL as * * `https://youwebsite.com/yourpage?[variable name]=[page number]` * * where `variable name` is set through {@link variable_name} and `page number` * represents the current page. * * Default is `get`. * * @return void */ public function method($method = 'get') { // set the page propagation method $this->_properties['method'] = (strtolower($method) == 'url' ? 'url' : 'get') ; } /** * Sets the position of the *next* and *previous* page, relative to the links to individual pages. * * @param string $position By default, the links for the *next* and *previous* page are shown on the outside * (to the left and right) of the links to individual pages. * * These links can also be shown both on the left or both on the right of the links to * individual pages by setting this argument to `left` or `right` respectively. * * Valid values are `left`, `right` and `outside`. * * Default is `outside`. * * @since 2.1 * * @return void */ public function navigation_position($position) { // set the positioning of next/previous page links $this->_properties['navigation_position'] = (in_array(strtolower($position), array('left', 'right')) ? strtolower($position) : 'outside') ; } /** * Sets whether page numbers should be prefixed with zeros. * * This is useful to keep the layout consistent by having the same number of characters for each page number. * * * // disable padding numbers with zeros * $pagination->padding(false); * * * @param boolean $status (Optional) Setting this property to `FALSE` will disable padding. * * Default is `TRUE`. * * @return void */ public function padding($status = true) { // set padding $this->_properties['padding'] = $status; } /** * Defines the total number of records that need to be paginated. * * Based on this and on the {@link records_per_page number of records to be shown per page}, the script will know * how many pages there are. * * * // tell the script that there are 100 total records * $pagination->records(100); * * * @param integer $records The total number of records that need to be paginated. * * @return void */ public function records($records) { // the number of records // make sure we save it as an integer $this->_properties['records'] = (int)$records; } /** * Defines the number of records that are displayed on a single page. * * Based on this and on the {@link records total number of records}, the script will know how many pages there are. * * * // tell the class that there are 20 records displayed on one page * $pagination->records_per_page(20); * * * @param integer $records_per_page The number of records displayed on a single page. * * Default is `10`. * * @return void */ public function records_per_page($records_per_page) { // the number of records displayed on one page // make sure we save it as an integer $this->_properties['records_per_page'] = (int)$records_per_page; } /** * Generates and outputs or returns the HTML markup for the pagination. * * * // generate output * // don't echo it but return it instead * $output = $pagination->render(true); * * * > If {@link https://getbootstrap.com/ Twitter Bootstrap} is not present on the page, make sure to load the * default styles by including the `zebra_pagination.css` file. * * @param boolean $return_output (Optional) Setting this argument to `TRUE` will instruct the script to * return the generated output rather than outputting it to the screen. * * Default is `FALSE`. * * @return mixed */ public function render($return_output = false) { // "base_url" must be explicitly declared if "variable_name" is an empty string and "method" is "url" if ($this->_properties['variable_name'] === '' && $this->_properties['method'] == 'url' && !$this->_properties['base_url_explicit']) { trigger_error('base_url must be explicitly declared if variable_name is an empty string', E_USER_ERROR); // "variable_name" cannot be an empty string when "method" is "get" } elseif ($this->_properties['variable_name'] === '' && $this->_properties['method'] == 'get') { trigger_error('variable_name must not be an empty when method is get', E_USER_ERROR); } // get some properties of the class $this->get_page(); // if there is a single page or no pages at all, and we don't have to always display navigation, don't display anything if ($this->_properties['total_pages'] <= 1 && !$this->_properties['always_show_navigation']) { return ''; } // start building output $output = '
    _properties['css_classes']['list'] != '' ? ' class="' . trim($this->_properties['css_classes']['list']) . '"' : '') . '>'; // if we're showing records in reverse order if ($this->_properties['reverse']) { // if "next page" and "previous page" links need to be shown to the left of the links to individual pages if ($this->_properties['navigation_position'] == 'left') { // first show next/previous and then page links $output .= $this->_show_next() . $this->_show_previous() . $this->_show_pages(); // if "next page" and "previous page" links need to be shown to the right of the links to individual pages } elseif ($this->_properties['navigation_position'] == 'right') { $output .= $this->_show_pages() . $this->_show_next() . $this->_show_previous(); // if "next page" and "previous page" links need to be shown on the outside of the links to individual pages } else { $output .= $this->_show_next() . $this->_show_pages() . $this->_show_previous(); } // if we're showing records in natural order } else { // if "next page" and "previous page" links need to be shown to the left of the links to individual pages if ($this->_properties['navigation_position'] == 'left') { // first show next/previous and then page links $output .= $this->_show_previous() . $this->_show_next() . $this->_show_pages(); // if "next page" and "previous page" links need to be shown to the right of the links to individual pages } elseif ($this->_properties['navigation_position'] == 'right') { $output .= $this->_show_pages() . $this->_show_previous() . $this->_show_next(); // if "next page" and "previous page" links need to be shown on the outside of the links to individual pages } else { $output .= $this->_show_previous() . $this->_show_pages() . $this->_show_next(); } } // finish generating the output $output .= '
'; // if $return_output is TRUE // return the generated content if ($return_output) { return $output; } // if script gets this far, print generated content to the screen echo $output; } /** * By default, pagination links are shown in natural order, from 1 to the number of total pages. * * Calling this method with the `TRUE` argument will generate links in reverse order, from the number of total pages * down to 1. * * * // show pagination links in reverse order rather than in natural order * $pagination->reverse(true); * * * @param boolean $reverse (Optional) Set it to `TRUE` to generate navigation links in reverse order. * * Default is `FALSE`. * * @return void * * @since 2.0 */ public function reverse($reverse = false) { // set how the pagination links should be generated $this->_properties['reverse'] = $reverse; } /** * Defines the number of pagination links to be displayed at once besides *previous page* and *next page* links. * * * // display links to 15 pages * $pagination->selectable_pages(15); * * * @param integer $selectable_pages The number of pagination links to be displayed at once besides *previous * page* and *next page* links. * * > For optimal results this should be an odd value so that the number of * links shown to the left and right of the current page is the same. * * Setting this to a value lower than `5` will automatically turn {@link condensed} * mode on. * * Default is `11`. * * @return void */ public function selectable_pages($selectable_pages) { // the number of selectable pages // make sure we save it as an integer $this->_properties['selectable_pages'] = (int)$selectable_pages; // if less than 5 selectable pages, turn "condensed" mode on if ($this->_properties['selectable_pages'] < 5) { $this->condensed(); } } /** * Sets the current page. * * * // sets the fifth page as the current page * $pagination->set_page(5); * * * @param integer $page The page's number. * * A number lower than `1` will be interpreted as `1`, while a number greater than the * total number of pages will be interpreted as the last page. * * @return void */ public function set_page($page) { // set the current page // make sure we save it as an integer $this->_properties['page'] = (int)$page; // if the number is lower than one // make it '1' if ($this->_properties['page'] < 1) { $this->_properties['page'] = 1; } // set a flag so that the "get_page" method doesn't change this value $this->_properties['page_set'] = true; } /** * Enables or disables trailing slash on the generated URLs when {@link method} is `url`. * * From an SEO perspective, a page with trailing slash is considered different than the same page without the trailing * slash. Read more on the subject at {@link https://webmasters.googleblog.com/2010/04/to-slash-or-not-to-slash.html Google Webmaster's official blog}. * * * // disables trailing slashes on generated URLs * $pagination->trailing_slash(false); * * * @param boolean $status (Optional) Setting this property to `FALSE` will disable trailing slashes on generated * URLs when {@link method} is `url`. * * Default is `TRUE` (trailing slashes are enabled by default). * * @return void */ public function trailing_slash($status = true) { // set the state of trailing slashes $this->_properties['trailing_slash'] = $status; } /** * Sets the variable name to be used for page propagation. * * * // sets the variable name to "foo" * // now, in the URL, the current page will be passed either as * // "foo=[page number]" (if method is "get") or as * // "/foo[page number]" (if method is "url") * $pagination->variable_name('foo'); * * * @param string $variable_name A string representing the variable name to be used for page propagation. * * Default is `page`. * * @return void */ public function variable_name($variable_name) { // set the variable name $this->_properties['variable_name'] = strtolower($variable_name); } /** * Returns the URL for the page given as argument. * * @param integer $page The page number for which to build the URL for * * @access private * * @return string */ protected function _build_uri($page) { // if page propagation method is through SEO friendly URLs if ($this->_properties['method'] == 'url') { // see if the current page is already set in the URL // when "variable_name" is an empty string we'll also factor in "base_url" (which is mandatory in this case) if ( preg_match( '/\b' . str_replace('/', '\/', preg_quote(($this->_properties['variable_name'] === '' ? $this->_properties['base_url'] . '/' : '') . $this->_properties['variable_name'])) . '([0-9]+)\b/i', $this->_properties['variable_name'] === '' ? $_SERVER['REQUEST_URI'] : $this->_properties['base_url'] ) > 0 ) { // build string $url = str_replace('//', '/', preg_replace( // replace the currently existing value // (also handle the case when "variable_name" is an empty string) '/\b' . str_replace('/', '\/', preg_quote(($this->_properties['variable_name'] === '' ? $this->_properties['base_url'] . '/' : '') . $this->_properties['variable_name'])) . '([0-9]+)\b/i', // if on the first page and we are avoiding duplicate content, remove page number // (also handle the case when "variable_name" is an empty string) ($this->_properties['variable_name'] === '' ? $this->_properties['base_url'] . '/' : '') . ($page == 1 && $this->_properties['avoid_duplicate_content'] ? '' : $this->_properties['variable_name'] . $page), // handle the case when "variable_name" is an empty string $this->_properties['variable_name'] === '' ? $_SERVER['REQUEST_URI'] : $this->_properties['base_url'] )); // if the current page is not yet in the URL, set it, unless we're on the first page // case in which we don't set it in order to avoid duplicate content } else { $url = ($this->_properties['variable_name'] !== '' ? $this->_properties['base_url'] . '/' : '') . $this->_properties['variable_name'] . $page; } // handle trailing slash according to preferences $url = rtrim($url, '/') . ($this->_properties['trailing_slash'] ? '/' : ''); // if values in the query string - other than those set through base_url() - are not to be preserved // preserve only those set initially // otherwise, get the current query string $query = !$this->_properties['preserve_query_string'] ? implode('&', $this->_properties['base_url_query']) : $_SERVER['QUERY_STRING']; // return the built string also appending the query string, if any $uri = $url . ($query != '' ? '?' . $query : ''); // if page propagation is to be done through GET } else { // if values in the query string - other than those set through base_url() - are not to be preserved // preserve only those set initially if (!$this->_properties['preserve_query_string']) { $query = $this->_properties['base_url_query']; // otherwise, get the current query string, if any, and transform it to an array } else { parse_str($_SERVER['QUERY_STRING'], $query); } // if we are avoiding duplicate content and if not the first/last page (depending on whether the pagination links are shown in natural or reversed order) if (!$this->_properties['avoid_duplicate_content'] || ($page != ($this->_properties['reverse'] ? $this->_properties['total_pages'] : 1))) { // add/update the page number $query[$this->_properties['variable_name']] = $page; // if we are avoiding duplicate content, don't use the "page" variable on the first/last page } elseif ($this->_properties['avoid_duplicate_content'] && $page == ($this->_properties['reverse'] ? $this->_properties['total_pages'] : 1)) { unset($query[$this->_properties['variable_name']]); } // make sure the returned HTML is W3C compliant $uri = htmlspecialchars(html_entity_decode($this->_properties['base_url']) . (!empty($query) ? '?' . http_build_query($query) : '')); } // if for whatever reason the URI is an empty string it means it should be pointing to the root ("/") // we can't leave this as an empty string or it will point to whatever URL is currently open in the browser return $uri !== '' ? rawurldecode($uri) : '/'; } /** * Returns the *next page* URL, depending on whether the pagination links are shown in natural or reversed order. * * @access private * * @return string */ protected function _show_next() { $output = ''; // if "always_show_navigation" is TRUE or // if the total number of available pages is greater than the number of pages to be displayed at once // it means we can show the "next page" link if ($this->_properties['always_show_navigation'] || $this->_properties['total_pages'] > $this->_properties['selectable_pages']) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // if we're on the last page, the link is disabled if ($this->_properties['page'] >= $this->_properties['total_pages']) { $css_classes[] = 'disabled'; } // generate markup $output = '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . // reverse arrows if necessary ($this->_properties['reverse'] ? $this->_properties['previous'] : $this->_properties['next']) . ''; } // return the resulting string return $output; } /** * Returns the pagination URLs (minus "next" and "previous"), depending on whether the pagination links are shown * in natural or reversed order. * * @access private * * @return string */ protected function _show_pages() { $output = ''; // if the total number of pages is lesser than the number of selectable pages and we are not in "condensed" mode if ($this->_properties['total_pages'] <= $this->_properties['selectable_pages'] && !$this->_properties['condensed']) { // iterate ascendingly or descendingly, depending on whether we're showing links in reverse order or not for ( $i = ($this->_properties['reverse'] ? $this->_properties['total_pages'] : 1); ($this->_properties['reverse'] ? $i >= 1 : $i <= $this->_properties['total_pages']); ($this->_properties['reverse'] ? $i-- : $i++) ) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // if this the currently selected page, highlight it if ($this->_properties['page'] == $i) { $css_classes[] = 'active'; } // generate markup $output .= '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . // apply padding if required ($this->_properties['padding'] ? str_pad($i, strlen($this->_properties['total_pages']), '0', STR_PAD_LEFT) : $i) . ''; } // if the total number of pages is greater than the number of selectable pages, or we are in "condensed" mode } else { // start with a link to the first page (or last, if we are displaying links in reverse order) // if we are not in "extra condensed" mode if ($this->_properties['condensed'] !== true) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // highlight if the page is currently selected if ($this->_properties['page'] == ($this->_properties['reverse'] ? $this->_properties['total_pages'] : 1)) { $css_classes[] = 'active'; } // generate markup $output .= '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . // if padding is required ($this->_properties['padding'] ? // apply padding str_pad(($this->_properties['reverse'] ? $this->_properties['total_pages'] : 1), strlen($this->_properties['total_pages']), '0', STR_PAD_LEFT) : // show the page number ($this->_properties['reverse'] ? $this->_properties['total_pages'] : 1)) . ''; } // compute the number of adjacent pages to display to the left and right of the currently selected page so // that the currently selected page is always centered $adjacent = floor(($this->_properties['selectable_pages'] - 3) / 2); // this number must be at least 1 if ($adjacent == 0) { $adjacent = 1; } // find the page number after we need to show the first "..." // (depending on whether we're showing links in reverse order or not) $scroll_from = ($this->_properties['reverse'] ? $this->_properties['total_pages'] - ($this->_properties['selectable_pages'] - $adjacent) + 1 : $this->_properties['selectable_pages'] - $adjacent); // get the page number from where we should start rendering // if displaying links in natural order, then it's "2" because we have already rendered the first page // if we're displaying links in reverse order, then it's total_pages - 1 because we have already rendered the last page $starting_page = ($this->_properties['reverse'] ? $this->_properties['total_pages'] - 1 : 2); // if if ( // we are not in "condensed" mode !$this->_properties['condensed'] && // the currently selected page is past the point from where we need to scroll, (($this->_properties['reverse'] && $this->_properties['page'] <= $scroll_from) || (!$this->_properties['reverse'] && $this->_properties['page'] >= $scroll_from)) ) { // by default, the starting_page should be whatever the current page plus/minus $adjacent // depending on whether we're showing links in reverse order or not $starting_page = $this->_properties['page'] + ($this->_properties['reverse'] ? $adjacent : -$adjacent); // but if that would mean displaying less navigation links than specified in $this->_properties['selectable_pages'] if ( ($this->_properties['reverse'] && $starting_page < ($this->_properties['selectable_pages'] - 1)) || (!$this->_properties['reverse'] && $this->_properties['total_pages'] - $starting_page < ($this->_properties['selectable_pages'] - 2)) ) { // adjust the value of $starting_page again if ($this->_properties['reverse']) { $starting_page = $this->_properties['selectable_pages'] - 1; } else { $starting_page -= ($this->_properties['selectable_pages'] - 2) - ($this->_properties['total_pages'] - $starting_page); } } // put the "..." after the link to the first/last page, depending on whether we're showing links in reverse order or not $output .= '_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? ' class="' . $this->_properties['css_classes']['list_item'] . '"' : '') . '>' . // add CSS classes to the span element, if necessary '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . '…'; } // get the page number where we should stop rendering // by default, this value is the sum of the starting page plus/minus (depending on whether we're showing links // in reverse order or not) whatever the number of $this->_properties['selectable_pages'] minus 3 (first page, // last page and current page) $ending_page = $starting_page + (($this->_properties['reverse'] ? -1 : 1) * ($this->_properties['selectable_pages'] - 3)); // if we're showing links in natural order and ending page would be greater than the total number of pages minus 1 // (minus one because we don't take into account the very last page which we output automatically) // adjust the ending page if ($this->_properties['reverse'] && $ending_page < 2) { $ending_page = 2; // or, if we're showing links in reverse order, and ending page would be smaller than 2 // (2 because we don't take into account the very first page which we output automatically) // adjust the ending page } elseif (!$this->_properties['reverse'] && $ending_page > $this->_properties['total_pages'] - 1) { $ending_page = $this->_properties['total_pages'] - 1; } // if we are not in "condensed" mode if (!$this->_properties['condensed']) { // render pagination links for ($i = $starting_page; $this->_properties['reverse'] ? $i >= $ending_page : $i <= $ending_page; $this->_properties['reverse'] ? $i-- : $i++) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // highlight the currently selected page if ($this->_properties['page'] == $i) { $css_classes[] = 'active'; } // generate markup $output .= '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . // apply padding if required ($this->_properties['padding'] ? str_pad((string)$i, strlen($this->_properties['total_pages']), '0', STR_PAD_LEFT) : $i) . ''; } } // if we are in "condensed" mode if ($this->_properties['condensed']) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // add the "disabled" class so it behaves nicely with Bootstrap $css_classes[] = 'disabled'; // generate markup $output .= '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . // show current page sprintf($this->_properties['condensed_progress'], $this->_properties['page'] > $this->_properties['total_pages'] ? 0 : $this->_properties['page'], $this->_properties['total_pages']) . ''; } // if we have to, place another "..." at the end, before the link to the last/first page (depending on whether we're showing links in reverse order or not) if ( // if we are not in "condensed" mode !$this->_properties['condensed'] && (($this->_properties['reverse'] && $ending_page > 2) || (!$this->_properties['reverse'] && $this->_properties['total_pages'] - $ending_page > 1)) ) { // generate markup $output .= '_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? ' class="' . $this->_properties['css_classes']['list_item'] . '"' : '') . '>' . // add CSS classes to the span element, if necessary '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . '…'; } // now we put a link to the last page (or first if we are showing links in reverse order) // if we are not in "extra condensed" mode if ($this->_properties['condensed'] !== true) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // highlight if the page is currently selected if ($this->_properties['page'] == ($this->_properties['reverse'] ? 1 : $this->_properties['total_pages'])) { $css_classes[] = 'active'; } // generate markup $output .= '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . // also, apply padding if necessary ($this->_properties['padding'] ? str_pad(($this->_properties['reverse'] ? 1 : $this->_properties['total_pages']), strlen($this->_properties['total_pages']), '0', STR_PAD_LEFT) : ($this->_properties['reverse'] ? 1 : $this->_properties['total_pages'])) . ''; } } // return the resulting string return $output; } /** * Generates the URL for the *previous page*, depending on whether the pagination links are shown in natural or reversed order. * * @access private * * @return string */ protected function _show_previous() { $output = ''; // if "always_show_navigation" is TRUE or // if the number of total pages available is greater than the number of selectable pages // it means we can show the "previous page" link if ($this->_properties['always_show_navigation'] || $this->_properties['total_pages'] > $this->_properties['selectable_pages']) { // CSS classes to be applied to the list item, if any $css_classes = isset($this->_properties['css_classes']['list_item']) && $this->_properties['css_classes']['list_item'] != '' ? array(trim($this->_properties['css_classes']['list_item'])) : array(); // if we're on the first page or there are no pages, the link is disabled if ($this->_properties['page'] == 1 || $this->_properties['total_pages'] == 0) { $css_classes[] = 'disabled'; } // generate markup $output = '_properties['css_classes']['anchor']) && $this->_properties['css_classes']['anchor'] != '' ? ' class="' . trim($this->_properties['css_classes']['anchor']) . '"' : '') . '>' . ($this->_properties['reverse'] ? $this->_properties['next'] : $this->_properties['previous']) . ''; } // return the resulting string return $output; } }