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WordPress/wp-includes/comment.php

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<?php
function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $comment_type) {
global $wpdb;
if (1 == get_settings('comment_moderation')) return false; // If moderation is set to manual
if ( (count(explode('http:', $comment)) - 1) >= get_settings('comment_max_links') )
return false; // Check # of external links
$mod_keys = trim( get_settings('moderation_keys') );
if ( !empty($mod_keys) ) {
$words = explode("\n", $mod_keys );
foreach ($words as $word) {
$word = trim($word);
// Skip empty lines
if (empty($word)) { continue; }
// Do some escaping magic so that '#' chars in the
// spam words don't break things:
$word = preg_quote($word, '#');
$pattern = "#$word#i";
if ( preg_match($pattern, $author) ) return false;
if ( preg_match($pattern, $email) ) return false;
if ( preg_match($pattern, $url) ) return false;
if ( preg_match($pattern, $comment) ) return false;
if ( preg_match($pattern, $user_ip) ) return false;
if ( preg_match($pattern, $user_agent) ) return false;
}
}
// Comment whitelisting:
if ( 1 == get_settings('comment_whitelist')) {
if ( 'trackback' == $comment_type || 'pingback' == $comment_type ) { // check if domain is in blogroll
$uri = parse_url($url);
$domain = $uri['host'];
$uri = parse_url( get_option('home') );
$home_domain = $uri['host'];
if ( $wpdb->get_var("SELECT link_id FROM $wpdb->links WHERE link_url LIKE ('%$domain%') LIMIT 1") || $domain == $home_domain )
return true;
else
return false;
} elseif( $author != '' && $email != '' ) {
$ok_to_comment = $wpdb->get_var("SELECT comment_approved FROM $wpdb->comments WHERE comment_author = '$author' AND comment_author_email = '$email' and comment_approved = '1' LIMIT 1");
if ( ( 1 == $ok_to_comment ) &&
( empty($mod_keys) || false === strpos( $email, $mod_keys) ) )
return true;
else
return false;
} else {
return false;
}
}
return true;
}
function get_approved_comments($post_id) {
global $wpdb;
$post_id = (int) $post_id;
return $wpdb->get_results("SELECT * FROM $wpdb->comments WHERE comment_post_ID = '$post_id' AND comment_approved = '1' ORDER BY comment_date");
}
// Retrieves comment data given a comment ID or comment object.
// Handles comment caching.
function &get_comment(&$comment, $output = OBJECT) {
global $comment_cache, $wpdb;
if ( empty($comment) )
return null;
if ( is_object($comment) ) {
if ( !isset($comment_cache[$comment->comment_ID]) )
$comment_cache[$comment->comment_ID] = &$comment;
$_comment = & $comment_cache[$comment->comment_ID];
} else {
if ( !isset($comment_cache[$comment]) ) {
$_comment = $wpdb->get_row("SELECT * FROM $wpdb->comments WHERE comment_ID = '$comment' LIMIT 1");
$comment_cache[$comment->comment_ID] = & $_comment;
} else {
$_comment = & $comment_cache[$comment];
}
}
if ( $output == OBJECT ) {
return $_comment;
} elseif ( $output == ARRAY_A ) {
return get_object_vars($_comment);
} elseif ( $output == ARRAY_N ) {
return array_values(get_object_vars($_comment));
} else {
return $_comment;
}
}
// Deprecate in favor of get_comment()?
function get_commentdata( $comment_ID, $no_cache = 0, $include_unapproved = false ) { // less flexible, but saves DB queries
global $postc, $id, $commentdata, $wpdb;
if ($no_cache) {
$query = "SELECT * FROM $wpdb->comments WHERE comment_ID = '$comment_ID'";
if (false == $include_unapproved) {
$query .= " AND comment_approved = '1'";
}
$myrow = $wpdb->get_row($query, ARRAY_A);
} else {
$myrow['comment_ID'] = $postc->comment_ID;
$myrow['comment_post_ID'] = $postc->comment_post_ID;
$myrow['comment_author'] = $postc->comment_author;
$myrow['comment_author_email'] = $postc->comment_author_email;
$myrow['comment_author_url'] = $postc->comment_author_url;
$myrow['comment_author_IP'] = $postc->comment_author_IP;
$myrow['comment_date'] = $postc->comment_date;
$myrow['comment_content'] = $postc->comment_content;
$myrow['comment_karma'] = $postc->comment_karma;
$myrow['comment_approved'] = $postc->comment_approved;
$myrow['comment_type'] = $postc->comment_type;
}
return $myrow;
}
function get_lastcommentmodified($timezone = 'server') {
global $cache_lastcommentmodified, $pagenow, $wpdb;
$add_seconds_blog = get_settings('gmt_offset') * 3600;
$add_seconds_server = date('Z');
$now = current_time('mysql', 1);
if ( !isset($cache_lastcommentmodified[$timezone]) ) {
switch(strtolower($timezone)) {
case 'gmt':
$lastcommentmodified = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_date_gmt <= '$now' ORDER BY comment_date_gmt DESC LIMIT 1");
break;
case 'blog':
$lastcommentmodified = $wpdb->get_var("SELECT comment_date FROM $wpdb->comments WHERE comment_date_gmt <= '$now' ORDER BY comment_date_gmt DESC LIMIT 1");
break;
case 'server':
$lastcommentmodified = $wpdb->get_var("SELECT DATE_ADD(comment_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->comments WHERE comment_date_gmt <= '$now' ORDER BY comment_date_gmt DESC LIMIT 1");
break;
}
$cache_lastcommentmodified[$timezone] = $lastcommentmodified;
} else {
$lastcommentmodified = $cache_lastcommentmodified[$timezone];
}
return $lastcommentmodified;
}
function wp_allow_comment($commentdata) {
global $wpdb;
extract($commentdata);
$comment_user_domain = apply_filters('pre_comment_user_domain', gethostbyaddr($comment_author_IP) );
// Simple duplicate check
$dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND ( comment_author = '$comment_author' ";
if ( $comment_author_email )
$dupe .= "OR comment_author_email = '$comment_author_email' ";
$dupe .= ") AND comment_content = '$comment_content' LIMIT 1";
if ( $wpdb->get_var($dupe) )
die( __('Duplicate comment detected; it looks as though you\'ve already said that!') );
// Simple flood-protection
if ( $lasttime = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_author_IP = '$comment_author_IP' OR comment_author_email = '$comment_author_email' ORDER BY comment_date DESC LIMIT 1") ) {
$time_lastcomment = mysql2date('U', $lasttime);
$time_newcomment = mysql2date('U', $comment_date_gmt);
if ( ($time_newcomment - $time_lastcomment) < 15 ) {
do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
die( __('Sorry, you can only post a new comment once every 15 seconds. Slow down cowboy.') );
}
}
if ( $user_id ) {
$userdata = get_userdata($user_id);
$user = new WP_User($user_id);
$post_author = $wpdb->get_var("SELECT post_author FROM $wpdb->posts WHERE ID = '$comment_post_ID' LIMIT 1");
}
// The author and the admins get respect.
if ( $userdata && ( $user_id == $post_author || $user->has_cap('level_9') ) ) {
$approved = 1;
}
// Everyone else's comments will be checked.
else {
if ( check_comment($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent, $comment_type) )
$approved = 1;
else
$approved = 0;
if ( wp_blacklist_check($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent) )
$approved = 'spam';
}
$approved = apply_filters('pre_comment_approved', $approved);
return $approved;
}
function wp_delete_comment($comment_id) {
global $wpdb;
do_action('delete_comment', $comment_id);
$comment = get_comment($comment_id);
if ( ! $wpdb->query("DELETE FROM $wpdb->comments WHERE comment_ID='$comment_id' LIMIT 1") )
return false;
$post_id = $comment->comment_post_ID;
if ( $post_id && $comment->comment_approved == 1 )
$wpdb->query( "UPDATE $wpdb->posts SET comment_count = comment_count - 1 WHERE ID = '$post_id'" );
do_action('wp_set_comment_status', $comment_id, 'delete');
return true;
}
function wp_get_comment_status($comment_id) {
global $wpdb;
$result = $wpdb->get_var("SELECT comment_approved FROM $wpdb->comments WHERE comment_ID='$comment_id' LIMIT 1");
if ($result == NULL) {
return 'deleted';
} else if ($result == '1') {
return 'approved';
} else if ($result == '0') {
return 'unapproved';
} else if ($result == 'spam') {
return 'spam';
} else {
return false;
}
}
function wp_insert_comment($commentdata) {
global $wpdb;
extract($commentdata);
if ( ! isset($comment_author_IP) )
$comment_author_IP = $_SERVER['REMOTE_ADDR'];
if ( ! isset($comment_date) )
$comment_date = current_time('mysql');
if ( ! isset($comment_date_gmt) )
$comment_date_gmt = gmdate('Y-m-d H:i:s', strtotime($comment_date) );
if ( ! isset($comment_parent) )
$comment_parent = 0;
if ( ! isset($comment_approved) )
$comment_approved = 1;
if ( ! isset($user_id) )
$user_id = 0;
$result = $wpdb->query("INSERT INTO $wpdb->comments
(comment_post_ID, comment_author, comment_author_email, comment_author_url, comment_author_IP, comment_date, comment_date_gmt, comment_content, comment_approved, comment_agent, comment_type, comment_parent, user_id)
VALUES
('$comment_post_ID', '$comment_author', '$comment_author_email', '$comment_author_url', '$comment_author_IP', '$comment_date', '$comment_date_gmt', '$comment_content', '$comment_approved', '$comment_agent', '$comment_type', '$comment_parent', '$user_id')
");
$id = $wpdb->insert_id;
if ( $comment_approved == 1) {
$count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND comment_approved = '1'");
$wpdb->query( "UPDATE $wpdb->posts SET comment_count = $count WHERE ID = '$comment_post_ID'" );
}
return $id;
}
function wp_filter_comment($commentdata) {
$commentdata['user_id'] = apply_filters('pre_user_id', $commentdata['user_ID']);
$commentdata['comment_agent'] = apply_filters('pre_comment_user_agent', $commentdata['comment_agent']);
$commentdata['comment_author'] = apply_filters('pre_comment_author_name', $commentdata['comment_author']);
$commentdata['comment_content'] = apply_filters('pre_comment_content', $commentdata['comment_content']);
$commentdata['comment_author_IP'] = apply_filters('pre_comment_user_ip', $commentdata['comment_author_IP']);
$commentdata['comment_author_url'] = apply_filters('pre_comment_author_url', $commentdata['comment_author_url']);
$commentdata['comment_author_email'] = apply_filters('pre_comment_author_email', $commentdata['comment_author_email']);
$commentdata['filtered'] = true;
return $commentdata;
}
function wp_new_comment( $commentdata ) {
$commentdata = apply_filters('preprocess_comment', $commentdata);
$commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID'];
$commentdata['user_ID'] = (int) $commentdata['user_ID'];
$commentdata['comment_author_IP'] = $_SERVER['REMOTE_ADDR'];
$commentdata['comment_agent'] = $_SERVER['HTTP_USER_AGENT'];
$commentdata['comment_date'] = current_time('mysql');
$commentdata['comment_date_gmt'] = current_time('mysql', 1);
$commentdata = wp_filter_comment($commentdata);
$commentdata['comment_approved'] = wp_allow_comment($commentdata);
$comment_ID = wp_insert_comment($commentdata);
do_action('comment_post', $comment_ID, $commentdata['comment_approved']);
if ( 'spam' !== $commentdata['comment_approved'] ) { // If it's spam save it silently for later crunching
if ( '0' == $commentdata['comment_approved'] )
wp_notify_moderator($comment_ID);
$post = &get_post($commentdata['comment_post_ID']); // Don't notify if it's your own comment
if ( get_settings('comments_notify') && $commentdata['comment_approved'] && $post->post_author != $commentdata['user_ID'] )
wp_notify_postauthor($comment_ID, $commentdata['comment_type']);
}
return $comment_ID;
}
function wp_set_comment_status($comment_id, $comment_status) {
global $wpdb;
switch($comment_status) {
case 'hold':
$query = "UPDATE $wpdb->comments SET comment_approved='0' WHERE comment_ID='$comment_id' LIMIT 1";
break;
case 'approve':
$query = "UPDATE $wpdb->comments SET comment_approved='1' WHERE comment_ID='$comment_id' LIMIT 1";
break;
case 'spam':
$query = "UPDATE $wpdb->comments SET comment_approved='spam' WHERE comment_ID='$comment_id' LIMIT 1";
break;
case 'delete':
return wp_delete_comment($comment_id);
break;
default:
return false;
}
if ($wpdb->query($query)) {
do_action('wp_set_comment_status', $comment_id, $comment_status);
$comment = get_comment($comment_id);
$comment_post_ID = $comment->comment_post_ID;
$c = $wpdb->get_row( "SELECT count(*) as c FROM {$wpdb->comments} WHERE comment_post_ID = '$comment_post_ID' AND comment_approved = '1'" );
if( is_object( $c ) )
$wpdb->query( "UPDATE $wpdb->posts SET comment_count = '$c->c' WHERE ID = '$comment_post_ID'" );
return true;
} else {
return false;
}
}
function wp_update_comment($commentarr) {
global $wpdb;
// First, get all of the original fields
$comment = get_comment($commentarr['comment_ID'], ARRAY_A);
// Escape data pulled from DB.
foreach ($comment as $key => $value)
$comment[$key] = $wpdb->escape($value);
// Merge old and new fields with new fields overwriting old ones.
$commentarr = array_merge($comment, $commentarr);
$commentarr = wp_filter_comment( $commentarr );
// Now extract the merged array.
extract($commentarr);
$comment_content = apply_filters('comment_save_pre', $comment_content);
$result = $wpdb->query(
"UPDATE $wpdb->comments SET
comment_content = '$comment_content',
comment_author = '$comment_author',
comment_author_email = '$comment_author_email',
comment_approved = '$comment_approved',
comment_author_url = '$comment_author_url',
comment_date = '$comment_date'
WHERE comment_ID = $comment_ID" );
$rval = $wpdb->rows_affected;
$c = $wpdb->get_row( "SELECT count(*) as c FROM {$wpdb->comments} WHERE comment_post_ID = '$comment_post_ID' AND comment_approved = '1'" );
if( is_object( $c ) )
$wpdb->query( "UPDATE $wpdb->posts SET comment_count = '$c->c' WHERE ID = '$comment_post_ID'" );
do_action('edit_comment', $comment_ID);
return $rval;
}
function pingback($content, $post_ID) {
global $wp_version, $wpdb;
include_once (ABSPATH . WPINC . '/class-IXR.php');
// original code by Mort (http://mort.mine.nu:8080)
$log = debug_fopen(ABSPATH . '/pingback.log', 'a');
$post_links = array();
debug_fwrite($log, 'BEGIN '.date('YmdHis', time())."\n");
$pung = get_pung($post_ID);
// Variables
$ltrs = '\w';
$gunk = '/#~:.?+=&%@!\-';
$punc = '.:?\-';
$any = $ltrs . $gunk . $punc;
// Step 1
// Parsing the post, external links (if any) are stored in the $post_links array
// This regexp comes straight from phpfreaks.com
// http://www.phpfreaks.com/quickcode/Extract_All_URLs_on_a_Page/15.php
preg_match_all("{\b http : [$any] +? (?= [$punc] * [^$any] | $)}x", $content, $post_links_temp);
// Debug
debug_fwrite($log, 'Post contents:');
debug_fwrite($log, $content."\n");
// Step 2.
// Walking thru the links array
// first we get rid of links pointing to sites, not to specific files
// Example:
// http://dummy-weblog.org
// http://dummy-weblog.org/
// http://dummy-weblog.org/post.php
// We don't wanna ping first and second types, even if they have a valid <link/>
foreach($post_links_temp[0] as $link_test) :
if ( !in_array($link_test, $pung) && (url_to_postid($link_test) != $post_ID) // If we haven't pung it already and it isn't a link to itself
&& !is_local_attachment($link_test) ) : // Also, let's never ping local attachments.
$test = parse_url($link_test);
if (isset($test['query']))
$post_links[] = $link_test;
elseif(($test['path'] != '/') && ($test['path'] != ''))
$post_links[] = $link_test;
endif;
endforeach;
do_action('pre_ping', array(&$post_links, &$pung));
foreach ($post_links as $pagelinkedto){
debug_fwrite($log, "Processing -- $pagelinkedto\n");
$pingback_server_url = discover_pingback_server_uri($pagelinkedto, 2048);
if ($pingback_server_url) {
@ set_time_limit( 60 );
// Now, the RPC call
debug_fwrite($log, "Page Linked To: $pagelinkedto \n");
debug_fwrite($log, 'Page Linked From: ');
$pagelinkedfrom = get_permalink($post_ID);
debug_fwrite($log, $pagelinkedfrom."\n");
// using a timeout of 3 seconds should be enough to cover slow servers
$client = new IXR_Client($pingback_server_url);
$client->timeout = 3;
$client->useragent .= ' -- WordPress/' . $wp_version;
// when set to true, this outputs debug messages by itself
$client->debug = false;
if ( $client->query('pingback.ping', $pagelinkedfrom, $pagelinkedto ) )
add_ping( $post_ID, $pagelinkedto );
else
debug_fwrite($log, "Error.\n Fault code: ".$client->getErrorCode()." : ".$client->getErrorMessage()."\n");
}
}
debug_fwrite($log, "\nEND: ".time()."\n****************************\n");
debug_fclose($log);
}
function discover_pingback_server_uri($url, $timeout_bytes = 2048) {
global $wp_version;
$byte_count = 0;
$contents = '';
$headers = '';
$pingback_str_dquote = 'rel="pingback"';
$pingback_str_squote = 'rel=\'pingback\'';
$x_pingback_str = 'x-pingback: ';
$pingback_href_original_pos = 27;
extract(parse_url($url));
if (!isset($host)) {
// Not an URL. This should never happen.
return false;
}
$path = (!isset($path)) ? '/' : $path;
$path .= (isset($query)) ? '?'.$query : '';
$port = (isset($port)) ? $port : 80;
// Try to connect to the server at $host
$fp = @fsockopen($host, $port, $errno, $errstr, 2);
if (!$fp) {
// Couldn't open a connection to $host;
return false;
}
// Send the GET request
$request = "GET $path HTTP/1.1\r\nHost: $host\r\nUser-Agent: WordPress/$wp_version \r\n\r\n";
// ob_end_flush();
fputs($fp, $request);
// Let's check for an X-Pingback header first
while (!feof($fp)) {
$line = fgets($fp, 512);
if (trim($line) == '') {
break;
}
$headers .= trim($line)."\n";
$x_pingback_header_offset = strpos(strtolower($headers), $x_pingback_str);
if ($x_pingback_header_offset) {
// We got it!
preg_match('#x-pingback: (.+)#is', $headers, $matches);
$pingback_server_url = trim($matches[1]);
return $pingback_server_url;
}
if(strpos(strtolower($headers), 'content-type: ')) {
preg_match('#content-type: (.+)#is', $headers, $matches);
$content_type = trim($matches[1]);
}
}
if (preg_match('#(image|audio|video|model)/#is', $content_type)) {
// Not an (x)html, sgml, or xml page, no use going further
return false;
}
while (!feof($fp)) {
$line = fgets($fp, 1024);
$contents .= trim($line);
$pingback_link_offset_dquote = strpos($contents, $pingback_str_dquote);
$pingback_link_offset_squote = strpos($contents, $pingback_str_squote);
if ($pingback_link_offset_dquote || $pingback_link_offset_squote) {
$quote = ($pingback_link_offset_dquote) ? '"' : '\'';
$pingback_link_offset = ($quote=='"') ? $pingback_link_offset_dquote : $pingback_link_offset_squote;
$pingback_href_pos = @strpos($contents, 'href=', $pingback_link_offset);
$pingback_href_start = $pingback_href_pos+6;
$pingback_href_end = @strpos($contents, $quote, $pingback_href_start);
$pingback_server_url_len = $pingback_href_end - $pingback_href_start;
$pingback_server_url = substr($contents, $pingback_href_start, $pingback_server_url_len);
// We may find rel="pingback" but an incomplete pingback URI
if ($pingback_server_url_len > 0) {
// We got it!
return $pingback_server_url;
}
}
$byte_count += strlen($line);
if ($byte_count > $timeout_bytes) {
// It's no use going further, there probably isn't any pingback
// server to find in this file. (Prevents loading large files.)
return false;
}
}
// We didn't find anything.
return false;
}
function is_local_attachment($url) {
if ( !strstr($url, get_bloginfo('home') ) )
return false;
if ( strstr($url, get_bloginfo('home') . '/?attachment_id=') )
return true;
if ( $id = url_to_postid($url) ) {
$post = & get_post($id);
if ( 'attachment' == $post->post_type )
return true;
}
return false;
}
?>
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