functions-post.php

php 开发的内容管理系统

		$lookup = $rev_ip . '.opm.blitzed.org.';
		if ( $lookup != gethostbyname( $lookup ) )
			return true;
	}

	return false;
}

function do_trackbacks($post_id) {
	global $wpdb;

	$post = $wpdb->get_row("SELECT * FROM $wpdb->posts WHERE ID = $post_id");
	$to_ping = get_to_ping($post_id);
	$pinged  = get_pung($post_id);
	if ( empty($to_ping) ) {
		$wpdb->query("UPDATE $wpdb->posts SET to_ping = '' WHERE ID = '$post_id'");
		return;
	}
	
	if (empty($post->post_excerpt))
		$excerpt = apply_filters('the_content', $post->post_content);
	else
		$excerpt = apply_filters('the_excerpt', $post->post_excerpt);
	$excerpt = str_replace(']]>', ']]>', $excerpt);
	$excerpt = strip_tags($excerpt);
	if ( function_exists('mb_strcut') ) // For international trackbacks
    	$excerpt = mb_strcut($excerpt, 0, 252, get_settings('blog_charset')) . '...';
	else
		$excerpt = substr($excerpt, 0, 252) . '...';

	$post_title = apply_filters('the_title', $post->post_title);
	$post_title = strip_tags($post_title);

	if ($to_ping) : foreach ($to_ping as $tb_ping) :
		$tb_ping = trim($tb_ping);
		if ( !in_array($tb_ping, $pinged) ) {
			trackback($tb_ping, $post_title, $excerpt, $post_id);
			$pinged[] = $tb_ping;
		} else {
			$wpdb->query("UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, '$tb_ping', '')) WHERE ID = '$post_id'");
		}
	endforeach; endif;
}

function get_pung($post_id) { // Get URIs already pung for a post
	global $wpdb;
	$pung = $wpdb->get_var("SELECT pinged FROM $wpdb->posts WHERE ID = $post_id");
	$pung = trim($pung);
	$pung = preg_split('/\s/', $pung);
	$pung = apply_filters('get_pung', $pung);
	return $pung;
}

function get_enclosed($post_id) { // Get enclosures already enclosed for a post
	global $wpdb;
	$custom_fields = get_post_custom( $post_id );
	$pung = array();
	if ( !is_array( $custom_fields ) )
		return $pung;

	foreach ( $custom_fields as $key => $val ) {
		if ( 'enclosure' != $key || !is_array( $val ) )
			continue;
		foreach( $val as $enc ) {
			$enclosure = split( "\n", $enc );
			$pung[] = trim( $enclosure[ 0 ] );
		}
	}
	$pung = apply_filters('get_enclosed', $pung);
	return $pung;
}

function get_to_ping($post_id) { // Get any URIs in the todo list
	global $wpdb;
	$to_ping = $wpdb->get_var("SELECT to_ping FROM $wpdb->posts WHERE ID = $post_id");
	$to_ping = trim($to_ping);
	$to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
	$to_ping = apply_filters('get_to_ping',  $to_ping);
	return $to_ping;
}

function add_ping($post_id, $uri) { // Add a URI to those already pung
	global $wpdb;
	$pung = $wpdb->get_var("SELECT pinged FROM $wpdb->posts WHERE ID = $post_id");
	$pung = trim($pung);
	$pung = preg_split('/\s/', $pung);
	$pung[] = $uri;
	$new = implode("\n", $pung);
	$new = apply_filters('add_ping', $new);
	return $wpdb->query("UPDATE $wpdb->posts SET pinged = '$new' WHERE ID = $post_id");
}

//fetches the pages returned as a FLAT list, but arranged in order of their hierarchy, i.e., child parents
//immediately follow their parents
function get_page_hierarchy($posts, $parent = 0) {
	$result = array ( );
	if ($posts) { foreach ($posts as $post) {
		if ($post->post_parent == $parent) {
			$result[$post->ID] = $post->post_name;
			$children = get_page_hierarchy($posts, $post->ID);
			$result += $children; //append $children to $result
		}
	} }
	return $result;
}

function generate_page_rewrite_rules() {
	global $wpdb;
	
	//get pages in order of hierarchy, i.e. children after parents
	$posts = get_page_hierarchy($wpdb->get_results("SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_status = 'static'"));
	//now reverse it, because we need parents after children for rewrite rules to work properly
	$posts = array_reverse($posts, true);

	$page_rewrite_rules = array();
	$page_attachment_rewrite_rules = array();

	if ($posts) {
		
		foreach ($posts as $id => $post) {

			// URI => page name
			$uri = get_page_uri($id);
			$attachments = $wpdb->get_results("SELECT ID, post_name, post_parent FROM $wpdb->posts WHERE post_status = 'attachment' AND post_parent = '$id'");
			if ( $attachments ) {
				foreach ( $attachments as $attachment ) {
					$attach_uri = get_page_uri($attachment->ID);
					$page_attachment_rewrite_rules[$attach_uri] = $attachment->post_name;
				}
			}

			$page_rewrite_rules[$uri] = $post;
		}

		update_option('page_uris', $page_rewrite_rules);
		
		if ( $page_attachment_rewrite_rules )
			update_option('page_attachment_uris', $page_attachment_rewrite_rules);
	}
}

function get_post_status($ID = '') {
	$post = get_post($ID);

	if ( is_object($post) ) {
		if ( ('attachment' == $post->post_status) && $post->post_parent && ($post->ID != $post->post_parent) )
			return get_post_status($post->post_parent);
		else
			return $post->post_status;
	}

	return false;
}

// Takes a post ID, returns its mime type.
function get_post_mime_type($ID = '') {
	$post = & get_post($ID);

	if ( is_object($post) )
		return $post->post_mime_type;

	return false;
}

function get_attached_file($attachment_id) {
	return get_post_meta($attachment_id, '_wp_attached_file', true);
}

function wp_mkdir_p($target) {
	// from php.net/mkdir user contributed notes
	if (file_exists($target)) {
		if (! @ is_dir($target))
			return false;
		else
			return true;
	}

	// Attempting to create the directory may clutter up our display.
	if (@ mkdir($target)) {
		$stat = @ stat(dirname($target));
		$dir_perms = $stat['mode'] & 0007777;  // Get the permission bits.
		@ chmod($target, $dir_perms);
		return true;
	} else {
		if ( is_dir(dirname($target)) )
			return false;	
	}

	// If the above failed, attempt to create the parent node, then try again.
	if (wp_mkdir_p(dirname($target)))
		return wp_mkdir_p($target);

	return false;
}

// Returns an array containing the current upload directory's path and url, or an error message.
if(!function_exists("wp_upload_dir")):
function wp_upload_dir() {
	$siteurl = get_settings('siteurl');
	//prepend ABSPATH to $dir and $siteurl to $url if they're not already there
	$path = str_replace(ABSPATH, '', trim(get_settings('upload_path')));
	$dir = ABSPATH . $path;
	$url = trailingslashit($siteurl) . $path;

	if ( $dir == ABSPATH ) { //the option was empty
		$dir = ABSPATH . 'wp-content/uploads';
	}

	if ( defined('UPLOADS') ) {
		$dir = ABSPATH . UPLOADS;
		$url = trailingslashit($siteurl) . UPLOADS;
	}

	if ( get_settings('uploads_use_yearmonth_folders')) {
		// Generate the yearly and monthly dirs
		$time = current_time( 'mysql' );
		$y = substr( $time, 0, 4 );
		$m = substr( $time, 5, 2 );
		$dir = $dir . "/$y/$m";
		$url = $url . "/$y/$m";
	}

	// Make sure we have an uploads dir
	if ( ! wp_mkdir_p( $dir ) ) {
		$message = sprintf(__('Unable to create directory %s. Is its parent directory writable by the server?'), $dir);
		return array('error' => $message);
	}

    $uploads = array('path' => $dir, 'url' => $url, 'error' => false);
	return apply_filters('upload_dir', $uploads);
}
endif;

function wp_upload_bits($name, $type, $bits) {
	if ( empty($name) )
		return array('error' => __("Empty filename"));

	$wp_filetype = wp_check_filetype($name);
	if ( !$wp_filetype['ext'] )
		return array('error' => __("Invalid file type"));

	$upload = wp_upload_dir();
	
	if ( $upload['error'] !== false )
		return $upload;

	$number = '';
	$filename = $name;
	$path_parts = pathinfo($filename);
	$ext = $path_parts['extension'];
	if ( empty($ext) )
		$ext = '';
	else
		$ext = ".$ext";
	while ( file_exists($upload['path'] . "/$filename") ) {
		if ( '' == "$number$ext" )
			$filename = $filename . ++$number . $ext;
		else
			$filename = str_replace("$number$ext", ++$number . $ext, $filename);
	}
		
	$new_file = $upload['path'] . "/$filename";
	if ( ! wp_mkdir_p( dirname($new_file) ) ) {
		$message = sprintf(__('Unable to create directory %s. Is its parent directory writable by the server?'), dirname($new_file));
		return array('error' => $message);
	}

	$ifp = @ fopen($new_file, 'wb');
	if ( ! $ifp )
		return array('error' => "Could not write file $new_file.");
		
	$success = @ fwrite($ifp, $bits);
	fclose($ifp);
	// Set correct file permissions
	$stat = @ stat(dirname($new_file));
	$perms = $stat['mode'] & 0007777;
	$perms = $perms & 0000666;
	@ chmod($new_file, $perms);

	// Compute the URL
	$url = $upload['url'] . "/$filename";

	return array('file' => $new_file, 'url' => $url, 'error' => false);
}

function wp_check_filetype($filename, $mimes = null) {
	// Accepted MIME types are set here as PCRE unless provided.
	$mimes = is_array($mimes) ? $mimes : apply_filters('upload_mimes', array (
		'jpg|jpeg|jpe' => 'image/jpeg',
		'gif' => 'image/gif',
		'png' => 'image/png',
		'bmp' => 'image/bmp',
		'tif|tiff' => 'image/tiff',
		'ico' => 'image/x-icon',
		'asf|asx|wax|wmv|wmx' => 'video/asf',
		'avi' => 'video/avi',
		'mov|qt' => 'video/quicktime',
		'mpeg|mpg|mpe' => 'video/mpeg',
		'txt|c|cc|h' => 'text/plain',
		'rtx' => 'text/richtext',
		'css' => 'text/css',
		'htm|html' => 'text/html',
		'mp3|mp4' => 'audio/mpeg',
		'ra|ram' => 'audio/x-realaudio',
		'wav' => 'audio/wav',
		'ogg' => 'audio/ogg',
		'mid|midi' => 'audio/midi',
		'wma' => 'audio/wma',
		'rtf' => 'application/rtf',
		'js' => 'application/javascript',
		'pdf' => 'application/pdf',
		'doc' => 'application/msword',
		'pot|pps|ppt' => 'application/vnd.ms-powerpoint',
		'wri' => 'application/vnd.ms-write',
		'xla|xls|xlt|xlw' => 'application/vnd.ms-excel',
		'mdb' => 'application/vnd.ms-access',
		'mpp' => 'application/vnd.ms-project',
		'swf' => 'application/x-shockwave-flash',
		'class' => 'application/java',
		'tar' => 'application/x-tar',
		'zip' => 'application/zip',
		'gz|gzip' => 'application/x-gzip',
		'exe' => 'application/x-msdownload'
	));

	$type = false;
	$ext = false;

	foreach ($mimes as $ext_preg => $mime_match) {
		$ext_preg = '!\.(' . $ext_preg . ')$!i';
		if ( preg_match($ext_preg, $filename, $ext_matches) ) {
			$type = $mime_match;
			$ext = $ext_matches[1];
			break;
		}
	}

	return compact('ext', 'type');
}

?>