Rework url_to_postid() to handle all supported permalink structs. Helps resolve pingback URIs to posts. http://mosquito.wordpress.org/view.php?id=1324
git-svn-id: http://svn.automattic.com/wordpress/trunk@2609 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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ryan
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@ -173,95 +173,57 @@ function get_usernumposts($userid) {
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// examine a url (supposedly from this blog) and try to
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// determine the post ID it represents.
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function url_to_postid($url = '') {
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global $wpdb;
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global $wp_rewrite;
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$siteurl = get_settings('home');
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// Take a link like 'http://example.com/blog/something'
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// and extract just the '/something':
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$uri = preg_replace("#$siteurl#i", '', $url);
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// on failure, preg_replace just returns the subject string
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// so if $uri and $siteurl are the same, they didn't match:
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if ($uri == $siteurl)
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return 0;
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// First, check to see if there is a 'p=N' or 'page_id=N' to match against:
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preg_match('#[?&](p|page_id)=(\d+)#', $uri, $values);
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$p = intval($values[2]);
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if ($p) return $p;
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preg_match('#[?&](p|page_id)=(\d+)#', $url, $values);
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$id = intval($values[2]);
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if ($id) return $id;
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// URI is probably a permalink.
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$rewrite = $wp_rewrite->wp_rewrite_rules();
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if ( empty($rewrite) )
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return 0;
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$req_uri = $url;
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$home_path = parse_url(get_settings('home'));
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$home_path = $home_path['path'];
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// Match $uri against our permalink structure
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$permalink_structure = get_settings('permalink_structure');
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// Trim path info from the end and the leading home path from the
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// front. For path info requests, this leaves us with the requesting
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// filename, if any. For 404 requests, this leaves us with the
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// requested permalink.
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$req_uri = str_replace($pathinfo, '', $req_uri);
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$req_uri = str_replace($home_path, '', $req_uri);
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$req_uri = trim($req_uri, '/');
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$request = $req_uri;
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// Matt's tokenizer code
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$rewritecode = array(
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'%year%',
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'%monthnum%',
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'%day%',
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'%hour%',
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'%minute%',
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'%second%',
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'%postname%',
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'%post_id%'
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);
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$rewritereplace = array(
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'([0-9]{4})?',
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'([0-9]{1,2})?',
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'([0-9]{1,2})?',
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'([0-9]{1,2})?',
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'([0-9]{1,2})?',
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'([0-9]{1,2})?',
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'([_0-9a-z-]+)?',
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'([0-9]+)?'
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);
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// Look for matches.
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$request_match = $request;
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foreach ($rewrite as $match => $query) {
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// If the requesting file is the anchor of the match, prepend it
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// to the path info.
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if ((! empty($req_uri)) && (strpos($match, $req_uri) === 0)) {
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$request_match = $req_uri . '/' . $request;
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}
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// Turn the structure into a regular expression
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$matchre = str_replace('/', '/?', $permalink_structure);
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$matchre = str_replace($rewritecode, $rewritereplace, $matchre);
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// Extract the key values from the uri:
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preg_match("#$matchre#",$uri,$values);
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// Extract the token names from the structure:
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preg_match_all("#%(.+?)%#", $permalink_structure, $tokens);
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for($i = 0; $i < count($tokens[1]); $i++) {
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$name = $tokens[1][$i];
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$value = $values[$i+1];
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// Create a variable named $year, $monthnum, $day, $postname, or $post_id:
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$$name = $value;
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}
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// If using %post_id%, we're done:
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if (intval($post_id)) return intval($post_id);
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// Otherwise, build a WHERE clause, making the values safe along the way:
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if ($year) $where .= " AND YEAR(post_date) = '" . intval($year) . "'";
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if ($monthnum) $where .= " AND MONTH(post_date) = '" . intval($monthnum) . "'";
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if ($day) $where .= " AND DAYOFMONTH(post_date) = '" . intval($day) . "'";
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if ($hour) $where .= " AND HOUR(post_date) = '" . intval($hour) . "'";
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if ($minute) $where .= " AND MINUTE(post_date) = '" . intval($minute) . "'";
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if ($second) $where .= " AND SECOND(post_date) = '" . intval($second) . "'";
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if ($postname) $where .= " AND post_name = '" . $wpdb->escape($postname) . "' ";
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// We got no indication, so we return false:
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if (!strlen($where)) {
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return false;
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if (preg_match("!^$match!", $request_match, $matches)) {
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// Got a match.
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// Trim the query of everything up to the '?'.
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$query = preg_replace("!^.+\?!", '', $query);
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// Substitute the substring matches into the query.
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eval("\$query = \"$query\";");
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$query = new WP_Query($query);
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if ( !empty($query->post) )
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return $query->post->ID;
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else
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return 0;
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}
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}
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// if all we got was a postname, it's probably a page, so we'll want to check for a possible subpage
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if ($postname && !$year && !$monthnum && !$day && !$hour && !$minute && !$second) {
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$postname = rtrim(strstr($uri, $postname), '/');
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$uri_array = explode('/', $postname);
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$postname = $uri_array[count($uri_array) - 1];
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$where = " AND post_name = '" . $wpdb->escape($postname) . "' ";
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}
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// Run the query to get the post ID:
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$id = intval($wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE 1 = 1 " . $where));
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return $id;
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return 0;
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}
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