comment-functions.php

php 开发的内容管理系统

	// 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_status )
			return true;
	}		
	return false;
}

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_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 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");
}

function sanitize_comment_cookies() {
	if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) ) {
		$comment_author = apply_filters('pre_comment_author_name', $_COOKIE['comment_author_'.COOKIEHASH]);
		$comment_author = stripslashes($comment_author);
		$comment_author = wp_specialchars($comment_author, true);
		$_COOKIE['comment_author_'.COOKIEHASH] = $comment_author;
	}

	if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) ) {
		$comment_author_email = apply_filters('pre_comment_author_email', $_COOKIE['comment_author_email_'.COOKIEHASH]);
		$comment_author_email = stripslashes($comment_author_email);
		$comment_author_email = wp_specialchars($comment_author_email, true);	
		$_COOKIE['comment_author_email_'.COOKIEHASH] = $comment_author_email;
	}

	if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) ) {
		$comment_author_url = apply_filters('pre_comment_author_url', $_COOKIE['comment_author_url_'.COOKIEHASH]);
		$comment_author_url = stripslashes($comment_author_url);
		$comment_author_url = wp_specialchars($comment_author_url, true);
		$_COOKIE['comment_author_url_'.COOKIEHASH] = $comment_author_url;
	}
}

function wp_get_current_commenter() {
	// Cookies should already be sanitized.

	$comment_author = '';
	if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) )
		$comment_author = $_COOKIE['comment_author_'.COOKIEHASH];

	$comment_author_email = '';
	if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) )
		$comment_author_email = $_COOKIE['comment_author_email_'.COOKIEHASH];

	$comment_author_url = '';
	if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) )
		$comment_author_url = $_COOKIE['comment_author_url_'.COOKIEHASH];

	return compact('comment_author', 'comment_author_email', 'comment_author_url');
}

?>