functions.php

php 开发的内容管理系统

	foreach($theme_files as $theme_file) {
		if ( ! is_readable("$theme_root/$theme_file") ) {
			$wp_broken_themes[$theme_file] = array('Name' => $theme_file, 'Title' => $theme_file, 'Description' => __('File not readable.'));
			continue;
		}

		$theme_data = get_theme_data("$theme_root/$theme_file");

		$name = $theme_data['Name'];
		$title = $theme_data['Title'];
		$description = wptexturize($theme_data['Description']);
		$version = $theme_data['Version'];
		$author = $theme_data['Author'];
		$template = $theme_data['Template'];
		$stylesheet = dirname($theme_file);

		foreach (array('png', 'gif', 'jpg', 'jpeg') as $ext) {
			if (file_exists("$theme_root/$stylesheet/screenshot.$ext")) {
				$screenshot = "screenshot.$ext";
				break;
			}
		}

		if ( empty($name) ) {
			$name = dirname($theme_file);
			$title = $name;
		}

		if ( empty($template) ) {
			if ( file_exists(dirname("$theme_root/$theme_file/index.php")) ) {
				$template = dirname($theme_file);
			} else {
				continue;
			}
		}

		$template = trim($template);

		if ( !file_exists("$theme_root/$template/index.php") ) {
			$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => __('Template is missing.'));
			continue;
		}

		$stylesheet_files = array();
		$stylesheet_dir = @ dir("$theme_root/$stylesheet");
		if ( $stylesheet_dir ) {
			while(($file = $stylesheet_dir->read()) !== false) {
				if ( !preg_match('|^\.+$|', $file) && preg_match('|\.css$|', $file) )
					$stylesheet_files[] = "$theme_loc/$stylesheet/$file";
			}
		}

		$template_files = array();
		$template_dir = @ dir("$theme_root/$template");
		if ( $template_dir ) {
			while(($file = $template_dir->read()) !== false) {
				if ( !preg_match('|^\.+$|', $file) && preg_match('|\.php$|', $file) )
					$template_files[] = "$theme_loc/$template/$file";
			}
		}

		$template_dir = dirname($template_files[0]);
		$stylesheet_dir = dirname($stylesheet_files[0]);

		if ( empty($template_dir) )
			$template_dir = '/';
		if ( empty($stylesheet_dir) )
			$stylesheet_dir = '/';

		// Check for theme name collision.  This occurs if a theme is copied to
		// a new theme directory and the theme header is not updated.  Whichever
		// theme is first keeps the name.  Subsequent themes get a suffix applied.
		// The Default and Classic themes always trump their pretenders.
		if ( isset($themes[$name]) ) {
			if ( ('WordPress Default' == $name || 'WordPress Classic' == $name) &&
					 ('default' == $stylesheet || 'classic' == $stylesheet) ) {
				// If another theme has claimed to be one of our default themes, move
				// them aside.
				$suffix = $themes[$name]['Stylesheet'];
				$new_name = "$name/$suffix";
				$themes[$new_name] = $themes[$name];
				$themes[$new_name]['Name'] = $new_name;
			} else {
				$name = "$name/$stylesheet";
			}
		}

		$themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template, 'Stylesheet' => $stylesheet, 'Template Files' => $template_files, 'Stylesheet Files' => $stylesheet_files, 'Template Dir' => $template_dir, 'Stylesheet Dir' => $stylesheet_dir, 'Status' => $theme_data['Status'], 'Screenshot' => $screenshot);
	}

	// Resolve theme dependencies.
	$theme_names = array_keys($themes);

	foreach ($theme_names as $theme_name) {
		$themes[$theme_name]['Parent Theme'] = '';
		if ( $themes[$theme_name]['Stylesheet'] != $themes[$theme_name]['Template'] ) {
			foreach ($theme_names as $parent_theme_name) {
				if ( ($themes[$parent_theme_name]['Stylesheet'] == $themes[$parent_theme_name]['Template']) && ($themes[$parent_theme_name]['Template'] == $themes[$theme_name]['Template']) ) {
					$themes[$theme_name]['Parent Theme'] = $themes[$parent_theme_name]['Name'];
					break;
				}
			}
		}
	}

	$wp_themes = $themes;

	return $themes;
}

function get_theme($theme) {
	$themes = get_themes();

	if ( array_key_exists($theme, $themes) )
		return $themes[$theme];

	return NULL;
}

function get_current_theme() {
	$themes = get_themes();
	$theme_names = array_keys($themes);
	$current_template = get_settings('template');
	$current_stylesheet = get_settings('stylesheet');
	$current_theme = 'WordPress Default';

	if ( $themes ) {
		foreach ($theme_names as $theme_name) {
			if ( $themes[$theme_name]['Stylesheet'] == $current_stylesheet &&
					$themes[$theme_name]['Template'] == $current_template ) {
				$current_theme = $themes[$theme_name]['Name'];
				break;
			}
		}
	}

	return $current_theme;
}

function get_query_template($type) {
	$template = '';
	if ( file_exists(TEMPLATEPATH . "/{$type}.php") )
		$template = TEMPLATEPATH . "/{$type}.php";

	return apply_filters("{$type}_template", $template);
}

function get_404_template() {
	return get_query_template('404');
}

function get_archive_template() {
	return get_query_template('archive');
}

function get_author_template() {
	return get_query_template('author');
}

function get_category_template() {
	$template = '';
	if ( file_exists(TEMPLATEPATH . "/category-" . get_query_var('cat') . '.php') )
		$template = TEMPLATEPATH . "/category-" . get_query_var('cat') . '.php';
	else if ( file_exists(TEMPLATEPATH . "/category.php") )
		$template = TEMPLATEPATH . "/category.php";

	return apply_filters('category_template', $template);
}

function get_date_template() {
	return get_query_template('date');
}

function get_home_template() {
	$template = '';

	if ( file_exists(TEMPLATEPATH . "/home.php") )
		$template = TEMPLATEPATH . "/home.php";
	else if ( file_exists(TEMPLATEPATH . "/index.php") )
		$template = TEMPLATEPATH . "/index.php";

	return apply_filters('home_template', $template);
}

function get_page_template() {
	global $wp_query;

	$id = $wp_query->post->ID;
	$template = get_post_meta($id, '_wp_page_template', true);

	if ( 'default' == $template )
		$template = '';

	if ( ! empty($template) && file_exists(TEMPLATEPATH . "/$template") )
		$template = TEMPLATEPATH . "/$template";
	else if ( file_exists(TEMPLATEPATH . "/page.php") )
		$template = TEMPLATEPATH . "/page.php";
	else
		$template = '';

	return apply_filters('page_template', $template);
}

function get_paged_template() {
	return get_query_template('paged');
}

function get_search_template() {
	return get_query_template('search');
}

function get_single_template() {
	return get_query_template('single');
}

function get_attachment_template() {
	global $posts;
	$type = explode('/', $posts[0]->post_mime_type);
	if ( $template = get_query_template($type[0]) )
		return $template;
	elseif ( $template = get_query_template($type[1]) )
		return $template;
	elseif ( $template = get_query_template("$type[0]_$type[1]") )
		return $template;
	else
		return get_query_template('attachment');
}

function get_comments_popup_template() {
	if ( file_exists( TEMPLATEPATH . '/comments-popup.php') )
		$template = TEMPLATEPATH . '/comments-popup.php';
	else
		$template = get_theme_root() . '/default/comments-popup.php';

	return apply_filters('comments_popup_template', $template);
}

// Borrowed from the PHP Manual user notes. Convert entities, while
// preserving already-encoded entities:
function htmlentities2($myHTML) {
	$translation_table=get_html_translation_table (HTML_ENTITIES,ENT_QUOTES);
	$translation_table[chr(38)] = '&';
	return preg_replace("/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/","&" , strtr($myHTML, $translation_table));
}


function is_plugin_page() {
	global $plugin_page;

	if ( isset($plugin_page) )
		return true;

	return false;
}

/*
add_query_arg: Returns a modified querystring by adding
a single key & value or an associative array.
Setting a key value to emptystring removes the key.
Omitting oldquery_or_uri uses the $_SERVER value.

Parameters:
add_query_arg(newkey, newvalue, oldquery_or_uri) or
add_query_arg(associative_array, oldquery_or_uri)
*/
function add_query_arg() {
	$ret = '';
	if ( is_array(func_get_arg(0)) ) {
		if ( @func_num_args() < 2 )
			$uri = $_SERVER['REQUEST_URI'];
		else
			$uri = @func_get_arg(1);
	} else {
		if ( @func_num_args() < 3 )
			$uri = $_SERVER['REQUEST_URI'];
		else
			$uri = @func_get_arg(2);
	}

	if ( preg_match('|^https?://|i', $uri, $matches) ) {
		$protocol = $matches[0];
		$uri = substr($uri, strlen($protocol));
	} else {
		$protocol = '';
	}

	if ( strstr($uri, '?') ) {
		$parts = explode('?', $uri, 2);
		if ( 1 == count($parts) ) {
			$base = '?';
			$query = $parts[0];
		} else {
			$base = $parts[0] . '?';
			$query = $parts[1];
		}
	} else if ( !empty($protocol) || strstr($uri, '/') ) {
		$base = $uri . '?';
		$query = '';
	} else {
		$base = '';
		$query = $uri;
	}

	parse_str($query, $qs);
	if ( is_array(func_get_arg(0)) ) {
		$kayvees = func_get_arg(0);
		$qs = array_merge($qs, $kayvees);
	} else {
		$qs[func_get_arg(0)] = func_get_arg(1);
	}

	foreach($qs as $k => $v) {
		if ( $v != '' ) {
			if ( $ret != '' )
				$ret .= '&';
			$ret .= "$k=$v";
		}
	}
	$ret = $protocol . $base . $ret;
	return trim($ret, '?');
}

function remove_query_arg($key, $query) {
	return add_query_arg($key, '', $query);
}

function load_template($file) {
	global $posts, $post, $wp_did_header, $wp_did_template_redirect, $wp_query,
		$wp_rewrite, $wpdb;

	extract($wp_query->query_vars);

	require_once($file);
}

function add_magic_quotes($array) {
	global $wpdb;

	foreach ($array as $k => $v) {
		if ( is_array($v) ) {
			$array[$k] = add_magic_quotes($v);
		} else {
			$array[$k] = $wpdb->escape($v);
		}
	}
	return $array;
}

function wp_remote_fopen( $uri ) {
	if ( ini_get('allow_url_fopen') ) {
		$fp = fopen( $uri, 'r' );
		if ( !$fp )
			return false;
		$linea = '';
		while( $remote_read = fread($fp, 4096) )
			$linea .= $remote_read;
		fclose($fp);
		return $linea;
	} else if ( function_exists('curl_init') ) {
		$handle = curl_init();
		curl_setopt ($handle, CURLOPT_URL, $uri);
		curl_setopt ($handle, CURLOPT_CONNECTTIMEOUT, 1);
		curl_setopt ($handle, CURLOPT_RETURNTRANSFER, 1);
		$buffer = curl_exec($handle);
		curl_close($handle);
		return $buffer;
	} else {
		return false;
	}
}

function wp($query_vars = '') {
	global $wp;
	
	$wp->main($query_vars);
}

function status_header( $header ) {
	if ( 200 == $header )
		$text = 'OK';
	elseif ( 301 == $header )
		$text = 'Moved Permanently';
	elseif ( 302 == $header )
		$text = 'Moved Temporarily';
	elseif ( 304 == $header )
		$text = 'Not Modified';
	elseif ( 404 == $header )
		$text = 'Not Found';
	elseif ( 410 == $header )
		$text = 'Gone';

	@header("HTTP/1.1 $header $text");
	@header("Status: $header $text");
}

function nocache_headers() {
	@ header('Expires: Wed, 11 Jan 1984 05:00:00 GMT');
	@ header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
	@ header('Cache-Control: no-cache, must-revalidate, max-age=0');
	@ header('Pragma: no-cache');
}

function get_usermeta( $user_id, $meta_key = '') {
	global $wpdb;
	$user_id = (int) $user_id;

	if ( !empty($meta_key) ) {
		$meta_key = preg_replace('|a-z0-9_|i', '', $meta_key);
		$metas = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
	} else {
		$metas = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->usermeta WHERE user_id = '$user_id'");
	}

	if ( empty($metas) ) {
		if ( empty($meta_key) )
			return array();
		else
			return '';
	}

	foreach ($metas as $index => $meta) {
		@ $value = unserialize($meta->meta_value);
		if ( $value === FALSE )
			$value = $meta->meta_value;

		$values[] = $value;
	}

	if ( count($values) == 1 )
		return $values[0];
	else
		return $values;
}

function update_usermeta( $user_id, $meta_key, $meta_value ) {
	global $wpdb;
	if ( !is_numeric( $user_id ) )
		return false;
	$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);

	if ( is_array($meta_value) || is_object($meta_value) )
		$meta_value = serialize($meta_value);
	$meta_value = trim( $meta_value );
	
	if (empty($meta_value)) {
		delete_usermeta($user_id, $meta_key);
	}

	$cur = $wpdb->get_row("SELECT * FROM $wpdb->usermeta WHERE user_id = '$user_id' AND meta_key = '$meta_key'");
	if ( !$cur ) {
		$wpdb->query("INSERT INTO $wpdb->usermeta ( user_id, meta_key, meta_value )
		VALUES
		( '$u