+<?php

+/**

+*

+* @package phpBB SEO Dynamic Meta tags

+* @version $Id: phpbb_seo_meta.php 252 2010-03-12 09:23:51Z dcz $

+* @copyright (c) 2006 - 2010 www.phpbb-seo.com

+* @license http://opensource.org/licenses/gpl-license.php GNU Public License v2

+*

+*/

+

+/**

+* @ignore

+*/

+if (!defined('IN_PHPBB')) {

+ exit;

+}

+/**

+* seo_meta Class

+* www.phpBB-SEO.com

+* @package phpBB SEO Dynamic Meta tags

+*/

+class seo_meta {

+ var $meta = array('title' => '', 'description' => '', 'keywords' => '', 'lang' => '', 'category' => '', 'robots' => '', 'distribution' => '', 'resource-type' => '', 'copyright' => '');

+ var $meta_def = array();

+ var $filters = array('description' => 'meta_filter_txt', 'keywords' => 'make_keywords');

+ // here you can comment a tag line to deactivate it

+ var $tpl = array(

+ 'lang' => '<meta name="content-language" content="%s" />',

+ 'title' => '<meta name="title" content="%s" />',

+ 'description' => '<meta name="description" content="%s" />',

+ 'keywords' => '<meta name="keywords" content="%s" />',

+ 'category' => '<meta name="category" content="%s" />',

+ 'robots' => '<meta name="robots" content="%s" />',

+ 'distribution' => '<meta name="distribution" content="%s" />',

+ 'resource-type' => '<meta name="resource-type" content="%s" />',

+ 'copyright' => '<meta name="copyright" content="%s" />',

+ );

+ /**

+ * Some config :

+ * => keywordlimit : number of keywords (max) in the keyword tag,

+ * => wordlimit : number of words (max) in the desc tag,

+ * => wordminlen : only words with more than wordminlen letters will be used, default is 2,

+ * => bbcodestrip : | separated list of bbcode to fully delete, tag + content, default is 'img|url|flash',

+ * => ellipsis : ellipsis to use if clipping,

+ * => topic_sql : Do a SQL to build topic meta keywords or just use the meta desc tag,

+ * => check_ignore : Check the search_ignore_words.php list.

+ * Please note :

+ * This will require some more work for the server.

+ * And this is mostly useless if you have re-enabled the search_ignore_words.php list

+ * filtering in includes/search/fulltest_native.php (and of course use fulltest_native index).

+ * => bypass_common : Bypass common words in viewtopic.php.

+ * Set to true by default because the most interesting keywords are as well among the most common.

+ * This of course provides with even better results when fulltest_native is used

+ * and search_ignore_words.php list was re-enabled.

+ * => get_filter : Disallow tag based on GET var used : coma separated list, will through a disallow meta tag.

+ * => file_filter : Disallow tag based on the physical script file name : coma separated list of file names

+ * Some default values are set bellow in the seo_meta_tags() method,

+ * most are acp configurable when using the Ultimate SEO URL mod :

+ * => http://www.phpbb-seo.com/en/phpbb-mod-rewrite/ultimate-seo-url-t4608.html (en)

+ * => http://www.phpbb-seo.com/fr/mod-rewrite-phpbb/ultimate-seo-url-t4489.html (fr)

+ **/

+ var $mconfig = array('keywordlimit' => 15, 'wordlimit' => 25, 'wordminlen' => 2, 'bbcodestrip' => 'img|url|flash|code', 'ellipsis' => ' ...', 'topic_sql' => true, 'check_ignore' => false, 'bypass_common' => true,

+ // Consider adding ", 'p' => 1" if your forum is no indexed yet or if no post urls are to be redirected

+ // to add a noindex tag on post urls

+ 'get_filter' => 'style,hilit,sid',

+ // noindex based on physical script file name

+ 'file_filter' => 'ucp',

+ );

+ /**

+ * constructor : Initialize meta tags

+ * All values from here will pass through utf8_htmlspecialchars() later

+ */

+ function seo_meta() {

+ global $config;

+ // default values, leave empty to only output the corresponding tag if filled

+ $this->meta_def['robots'] = 'index,follow';

+ // global values, if these are empty, the corresponding meta will not show up

+ $this->meta['category'] = 'general';

+ $this->meta['distribution'] = 'global';

+ $this->meta['resource-type'] = 'document';

+ // other settings that may be set through acp in cas the mod is not used standalone

+ if (isset($config['seo_meta_desc_limit'])) {

+ // defaults

+ $this->meta_def['title'] = $config['seo_meta_title'];

+ $this->meta_def['description'] = $config['seo_meta_desc'];

+ $this->meta_def['keywords'] = $config['seo_meta_keywords'];

+ $this->meta_def['robots'] = $config['seo_meta_robots'];

+ // global

+ $this->meta['lang'] = $config['seo_meta_lang'];

+ $this->meta['copyright'] = $config['seo_meta_copy'];

+ // settings

+ $this->mconfig['wordlimit'] = (int) $config['seo_meta_desc_limit'];

+ $this->mconfig['keywordlimit'] = (int) $config['seo_meta_keywords_limit'];

+ $this->mconfig['wordminlen'] = (int) $config['seo_meta_min_len'];

+ $this->mconfig['check_ignore'] = (int) $config['seo_meta_check_ignore'];

+ $this->mconfig['file_filter'] = preg_replace('`[\s]+`', '', trim($config['seo_meta_file_filter'], ', '));

+ $this->mconfig['get_filter'] = preg_replace('`[\s]+`', '', trim($config['seo_meta_get_filter'], ', '));

+ $this->mconfig['bbcodestrip'] = str_replace(',', '|', preg_replace('`[\s]+`', '', trim($config['seo_meta_bbcode_filter'], ', ')));

+ } else {

+ // default values, leave empty to only output the corresponding tag if filled

+ $this->meta_def['title'] = $config['sitename'];

+ $this->meta_def['description'] = $config['site_desc'];

+ $this->meta_def['keywords'] = $config['site_desc'];

+ // global values, if these are empty, the corresponding meta will not show up

+ $this->meta['lang'] = $config['default_lang'];

+ $this->meta['copyright'] = $config['sitename'];

+ }

+ $this->mconfig['get_filter'] = !empty($this->mconfig['get_filter']) ? @explode(',', $this->mconfig['get_filter']) : array();

+ $this->mconfig['topic_sql'] = $config['search_type'] == 'fulltext_native' ? $this->mconfig['topic_sql'] : false;

+ return;

+ }

+ /**

+ * assign / retrun meta tag code

+ */

+ function build_meta( $page_title = '', $return = false) {

+ global $phpEx, $user, $phpbb_seo, $template, $config;

+ // If meta robots was not manually set

+ if (empty($this->meta['robots'])) {

+ // If url Rewriting is on, we shall be more strict on noindex (since we can :p)

+ if (!empty($phpbb_seo->seo_opt['url_rewrite'])) {

+ // If url Rewriting is on, we can deny indexing for any rewritten url with ?

+ if (preg_match('`(\.html?|/)\?[^\?]*$`i', $phpbb_seo->seo_path['uri'])) {

+ $this->meta['robots'] = 'noindex,follow';

+ } else {

+ // lets still add some more specific ones

+ $this->mconfig['get_filter'] = array_merge($this->mconfig['get_filter'], array('st','sk','sd','ch'));

+ }

+ }

+ // Do we allow indexing based on physical script file name

+ if (empty($this->meta['robots'])) {

+ if (strpos($this->mconfig['file_filter'], str_replace(".$phpEx", '', $user->page['page_name'])) !== false) {

+ $this->meta['robots'] = 'noindex,follow';

+ }

+ }

+ // Do we allow indexing based on get variable

+ if (empty($this->meta['robots'])) {

+ foreach ( $this->mconfig['get_filter'] as $get ) {

+ if (isset($_GET[$get])) {

+ $this->meta['robots'] = 'noindex,follow';

+ break;

+ }

+ }

+ }

+ // fallback to default if necessary

+ if (empty($this->meta['robots'])) {

+ $this->meta['robots'] = $this->meta_def['robots'];

+ }

+ }

+ if (!empty($config['seo_meta_noarchive'])) {

+ $forum_id = isset($_GET['f']) ? max(0, (int) request_var('f', 0)) : 0;

+ if ($forum_id) {

+ $forum_ids = @explode(',', preg_replace('`[\s]+`', '', trim($config['seo_meta_noarchive'], ', ')));

+ if (in_array($forum_id, $forum_ids)) {

+ $this->meta['robots'] .= (!empty($this->meta['robots']) ? ',' : '') . 'noarchive';

+ }

+ }

+ }

+ // deal with titles, assign the tag if a default is set

+ if (empty($this->meta['title']) && !empty($this->meta_def['title'])) {

+ $this->meta['title'] = $page_title;

+ }

+ $meta_code = '';

+ foreach ($this->tpl as $key => $value) {

+ if (isset($this->meta[$key])) {

+ // do like this so we can deactivate one particular tag on a given page,

+ // by just setting the meta to an empty string

+ if (trim($this->meta[$key])) {

+ $this->meta[$key] = isset($this->filters[$key]) ? $this->{$this->filters[$key]}($this->meta[$key]) : $this->meta[$key];

+ }

+ } else if (!empty($this->meta_def[$key])) {

+ $this->meta[$key] = isset($this->filters[$key]) ? $this->{$this->filters[$key]}($this->meta_def[$key]) : $this->meta_def[$key];

+ }

+ if (trim($this->meta[$key])) {

+ $meta_code .= sprintf($value, utf8_htmlspecialchars($this->meta[$key])) . "\n";

+ }

+ }

+ if (!$return) {

+ $template->assign_var('META_TAG', $meta_code);

+ } else {

+ return $meta_code;

+ }

+ }

+ /**

+ * Returns a coma separated keyword list

+ */

+ function make_keywords($text, $decode_entities = false) {

+ static $filter = array('`&(amp;)?[^;]+;`i', '`[[:punct:]]+`', '`[0-9]+`', '`[\s]+`');

+ $keywords = '';

+ $num = 0;

+ $text = $decode_entities ? html_entity_decode(strip_tags($text), ENT_COMPAT, 'UTF-8') : strip_tags($text);

+ $text = utf8_strtolower(trim(preg_replace($filter, ' ', $text)));

+ if (!$text) {

+ return '';

+ }

+ $text = explode(' ', trim($text));

+ if ($this->mconfig['check_ignore']) {

+ global $phpbb_root_path, $user, $phpEx;

+ // add stop words to $user to allow reuse

+ if (empty($user->stop_words)) {

+ $words = array();

+ if (file_exists("{$user->lang_path}{$user->lang_name}/search_ignore_words.$phpEx")) {

+ // include the file containing ignore words

+ include("{$user->lang_path}{$user->lang_name}/search_ignore_words.$phpEx");

+ }

+ $user->stop_words = & $words;

+ }

+ $text = array_diff($text, $user->stop_words);

+ }

+ if (empty($text)) {

+ return '';

+ }

+ // We take the most used words first

+ $text = array_count_values($text);

+ arsort($text);

+ foreach ($text as $word => $count) {

+ if ( utf8_strlen($word) > $this->mconfig['wordminlen'] ) {

+ $keywords .= ', ' . $word;

+ $num++;

+ if ( $num >= $this->mconfig['keywordlimit'] ) {

+ break;

+ }

+ }

+ }

+ return trim($keywords, ', ');

+ }

+ /**

+ * Filter php/html tags and white spaces and string with limit in words

+ */

+ function meta_filter_txt($text, $bbcode = true) {

+ if ($bbcode) {

+ static $RegEx = array();

+ static $replace = array();

+ if (empty($RegEx)) {

+ $RegEx = array('`&(amp;)?[^;]+;`i', // HTML entitites

+ '`<[^>]*>(.*<[^>]*>)?`Usi', // HTML code

+ );

+ $replace = array(' ', ' ');

+ if (!empty($this->mconfig['bbcodestrip'])) {

+ $RegEx[] = '`\[(' . $this->mconfig['bbcodestrip'] . ')[^\[\]]*\].*\[/\1[^\[\]]*\]`Usi'; // bbcode to strip

+ $replace[] = ' ';

+ }

+ $RegEx[] = '`\[\/?[a-z0-9\*\+\-]+(?:=(?:&quot;.*&quot;|[^\]]*))?(?::[a-z])?(\:[0-9a-z]{5,})\]`'; // Strip all bbcode tags

+ $replace[] = '';

+ $RegEx[] = '`[\s]+`'; // Multiple spaces

+ $replace[] = ' ';

+ }

+ return $this->word_limit(preg_replace($RegEx, $replace, $text));

+ }

+ return $this->word_limit(preg_replace(array('`<[^>]*>(.*<[^>]*>)?`Usi', '`\[\/?[a-z0-9\*\+\-]+(?:=(?:&quot;.*&quot;|[^\]]*))?(?::[a-z])?(\:[0-9a-z]{5,})\]`', '`[\s]+`'), ' ', $text));

+ }

+ /**

+ * Cut the text according to the number of words.

+ * Borrowed from www.php.net http://www.php.net/preg_replace

+ */

+ function word_limit($string) {

+ return count($words = preg_split('/\s+/', ltrim($string), $this->mconfig['wordlimit'] + 1)) > $this->mconfig['wordlimit'] ? rtrim(utf8_substr($string, 0, utf8_strlen($string) - utf8_strlen(end($words)))) . $this->mconfig['ellipsis'] : $string;

+ }

+ /**

+ * add meta tag

+ * $content : if empty, the called tag will show up

+ * do not call to fall back to default

+ */

+ function collect($type, $content = '', $combine = false) {

+ if ($combine) {

+ $this->meta[$type] = (isset($this->meta[$type]) ? $this->meta[$type] . ' ' : '') . (string) $content;

+ } else {

+ $this->meta[$type] = (string) $content;

+ }

+ }

+}

+?> \ No newline at end of file