|
+-----------------------------------------------------------------------+
*/
/**
* Class to create HTML page output using a skin template
*
* @package Webmail
* @subpackage View
*/
class rcmail_output_html extends rcmail_output
{
public $type = 'html';
protected $message;
protected $template_name;
protected $objects = array();
protected $js_env = array();
protected $js_labels = array();
protected $js_commands = array();
protected $skin_paths = array();
protected $skin_name = '';
protected $scripts_path = '';
protected $script_files = array();
protected $css_files = array();
protected $scripts = array();
protected $meta_tags = array();
protected $link_tags = array('shortcut icon' => '');
protected $header = '';
protected $footer = '';
protected $body = '';
protected $base_path = '';
protected $assets_path;
protected $assets_dir = RCUBE_INSTALL_PATH;
protected $devel_mode = false;
protected $default_template = "\n\n\n";
// deprecated names of templates used before 0.5
protected $deprecated_templates = array(
'contact' => 'showcontact',
'contactadd' => 'addcontact',
'contactedit' => 'editcontact',
'identityedit' => 'editidentity',
'messageprint' => 'printmessage',
);
// deprecated names of template objects used before 1.4
protected $deprecated_template_objects = array(
'addressframe' => 'contentframe',
'messagecontentframe' => 'contentframe',
'prefsframe' => 'contentframe',
'folderframe' => 'contentframe',
'identityframe' => 'contentframe',
'responseframe' => 'contentframe',
'keyframe' => 'contentframe',
'filterframe' => 'contentframe',
);
/**
* Constructor
*/
public function __construct($task = null, $framed = false)
{
parent::__construct();
$this->devel_mode = $this->config->get('devel_mode');
$this->set_env('task', $task);
$this->set_env('standard_windows', (bool) $this->config->get('standard_windows'));
$this->set_env('locale', $_SESSION['language']);
$this->set_env('devel_mode', $this->devel_mode);
// Version number e.g. 1.4.2 will be 10402
$version = explode('.', preg_replace('/[^0-9.].*/', '', RCMAIL_VERSION));
$this->set_env('rcversion', $version[0] * 10000 + $version[1] * 100 + $version[2]);
// add cookie info
$this->set_env('cookie_domain', ini_get('session.cookie_domain'));
$this->set_env('cookie_path', ini_get('session.cookie_path'));
$this->set_env('cookie_secure', filter_var(ini_get('session.cookie_secure'), FILTER_VALIDATE_BOOLEAN));
// Easy way to change skin via GET argument, for developers
if ($this->devel_mode && !empty($_GET['skin']) && preg_match('/^[a-z0-9-_]+$/i', $_GET['skin'])) {
if ($this->check_skin($_GET['skin'])) {
$this->set_skin($_GET['skin']);
$this->app->user->save_prefs(array('skin' => $_GET['skin']));
}
}
// load and setup the skin
$this->set_skin($this->config->get('skin'));
$this->set_assets_path($this->config->get('assets_path'), $this->config->get('assets_dir'));
if (!empty($_REQUEST['_extwin']))
$this->set_env('extwin', 1);
if ($this->framed || $framed)
$this->set_env('framed', 1);
$lic = <<add_script($lic, 'head_top');
$this->add_script('var '.self::JS_OBJECT_NAME.' = new rcube_webmail();', 'head_top');
// don't wait for page onload. Call init at the bottom of the page (delayed)
$this->add_script(self::JS_OBJECT_NAME.'.init();', 'docready');
$this->scripts_path = 'program/js/';
$this->include_script('jquery.min.js');
$this->include_script('common.js');
$this->include_script('app.js');
// register common UI objects
$this->add_handlers(array(
'loginform' => array($this, 'login_form'),
'preloader' => array($this, 'preloader'),
'username' => array($this, 'current_username'),
'message' => array($this, 'message_container'),
'charsetselector' => array($this, 'charset_selector'),
'aboutcontent' => array($this, 'about_content'),
));
// set blankpage (watermark) url
$blankpage = $this->config->get('blankpage_url', '/watermark.html');
$this->set_env('blankpage', $blankpage);
}
/**
* Set environment variable
*
* @param string $name Property name
* @param mixed $value Property value
* @param boolean $addtojs True if this property should be added
* to client environment
*/
public function set_env($name, $value, $addtojs = true)
{
$this->env[$name] = $value;
if ($addtojs || isset($this->js_env[$name])) {
$this->js_env[$name] = $value;
}
}
/**
* Parse and set assets path
*
* @param string $path Assets path URL (relative or absolute)
* @param string $fs_dif Assets path in filesystem
*/
public function set_assets_path($path, $fs_dir = null)
{
if (empty($path)) {
return;
}
$path = rtrim($path, '/') . '/';
// handle relative assets path
if (!preg_match('|^https?://|', $path) && $path[0] != '/') {
// save the path to search for asset files later
$this->assets_dir = $path;
$base = preg_replace('/[?#&].*$/', '', $_SERVER['REQUEST_URI']);
$base = rtrim($base, '/');
// remove url token if exists
if ($len = intval($this->config->get('use_secure_urls'))) {
$_base = explode('/', $base);
$last = count($_base) - 1;
$length = $len > 1 ? $len : 16; // as in rcube::get_secure_url_token()
// we can't use real token here because it
// does not exists in unauthenticated state,
// hope this will not produce false-positive matches
if ($last > -1 && preg_match('/^[a-f0-9]{' . $length . '}$/', $_base[$last])) {
$path = '../' . $path;
}
}
}
// set filesystem path for assets
if ($fs_dir) {
if ($fs_dir[0] != '/') {
$fs_dir = realpath(RCUBE_INSTALL_PATH . $fs_dir);
}
// ensure the path ends with a slash
$this->assets_dir = rtrim($fs_dir, '/') . '/';
}
$this->assets_path = $path;
$this->set_env('assets_path', $path);
}
/**
* Getter for the current page title
*
* @param bool $full Prepend title with product/user name
*
* @return string The page title
*/
protected function get_pagetitle($full = true)
{
if (!empty($this->pagetitle)) {
$title = $this->pagetitle;
}
else if ($this->env['task'] == 'login') {
$title = $this->app->gettext(array(
'name' => 'welcome',
'vars' => array('product' => $this->config->get('product_name')
)));
}
else {
$title = ucfirst($this->env['task']);
}
if ($full) {
if ($this->devel_mode && !empty($_SESSION['username'])) {
$title = $_SESSION['username'] . ' :: ' . $title;
}
else if ($prod_name = $this->config->get('product_name')) {
$title = $prod_name . ' :: ' . $title;
}
}
return $title;
}
/**
* Getter for the current skin path property
*/
public function get_skin_path()
{
return $this->skin_paths[0];
}
/**
* Set skin
*
* @param string $skin Skin name
*/
public function set_skin($skin)
{
if (!$this->check_skin($skin)) {
$skin = rcube_config::DEFAULT_SKIN;
}
$skin_path = 'skins/' . $skin;
$this->config->set('skin_path', $skin_path);
$this->base_path = $skin_path;
// register skin path(s)
$this->skin_paths = array();
$this->skins = array();
$this->load_skin($skin_path);
$this->skin_name = $skin;
$this->set_env('skin', $skin);
}
/**
* Check skin validity/existence
*
* @param string $skin Skin name
*
* @return bool True if the skin exist and is readable, False otherwise
*/
public function check_skin($skin)
{
// Sanity check to prevent from path traversal vulnerability (#1490620)
if (strpos($skin, '/') !== false || strpos($skin, "\\") !== false) {
rcube::raise_error(array(
'file' => __FILE__,
'line' => __LINE__,
'message' => 'Invalid skin name'
), true, false);
return false;
}
$path = RCUBE_INSTALL_PATH . 'skins/';
return !empty($skin) && is_dir($path . $skin) && is_readable($path . $skin);
}
/**
* Helper method to recursively read skin meta files and register search paths
*/
private function load_skin($skin_path)
{
$this->skin_paths[] = $skin_path;
// read meta file and check for dependencies
$meta = @file_get_contents(RCUBE_INSTALL_PATH . $skin_path . '/meta.json');
$meta = @json_decode($meta, true);
$meta['path'] = $skin_path;
$path_elements = explode('/', $skin_path);
$skin_id = end($path_elements);
if (!$meta['name']) {
$meta['name'] = $skin_id;
}
$this->skins[$skin_id] = $meta;
// Keep skin config for ajax requests (#6613)
$_SESSION['skin_config'] = array();
if ($meta['extends']) {
$path = RCUBE_INSTALL_PATH . 'skins/';
if (is_dir($path . $meta['extends']) && is_readable($path . $meta['extends'])) {
$_SESSION['skin_config'] = $this->load_skin('skins/' . $meta['extends']);
}
}
if (!empty($meta['config'])) {
foreach ($meta['config'] as $key => $value) {
$this->config->set($key, $value, true);
$_SESSION['skin_config'][$key] = $value;
}
$value = array_merge((array) $this->config->get('dont_override'), array_keys($meta['config']));
$this->config->set('dont_override', $value, true);
}
if (!empty($meta['localization'])) {
$locdir = $meta['localization'] === true ? 'localization' : $meta['localization'];
if ($texts = $this->app->read_localization(RCUBE_INSTALL_PATH . $skin_path . '/' . $locdir)) {
$this->app->load_language($_SESSION['language'], $texts);
}
}
// Use array_merge() here to allow for global default and extended skins
$this->meta_tags = array_merge($this->meta_tags, (array) $meta['meta']);
$this->link_tags = array_merge($this->link_tags, (array) $meta['links']);
return $_SESSION['skin_config'];
}
/**
* Check if a specific template exists
*
* @param string $name Template name
*
* @return boolean True if template exists
*/
public function template_exists($name)
{
foreach ($this->skin_paths as $skin_path) {
$filename = RCUBE_INSTALL_PATH . $skin_path . '/templates/' . $name . '.html';
if ((is_file($filename) && is_readable($filename))
|| ($this->deprecated_templates[$name] && $this->template_exists($this->deprecated_templates[$name]))
) {
return true;
}
}
return false;
}
/**
* Find the given file in the current skin path stack
*
* @param string $file File name/path to resolve (starting with /)
* @param string &$skin_path Reference to the base path of the matching skin
* @param string $add_path Additional path to search in
* @param bool $minified Fallback to a minified version of the file
*
* @return mixed Relative path to the requested file or False if not found
*/
public function get_skin_file($file, &$skin_path = null, $add_path = null, $minified = false)
{
$skin_paths = $this->skin_paths;
if ($add_path) {
array_unshift($skin_paths, $add_path);
$skin_paths = array_unique($skin_paths);
}
if ($skin_path = $this->find_file_path($file, $skin_paths)) {
return $skin_path . $file;
}
if ($minified && preg_match('/(?find_file_path($file, $skin_paths)) {
return $skin_path . $file;
}
}
return false;
}
/**
* Find path of the asset file
*/
protected function find_file_path($file, $skin_paths)
{
foreach ($skin_paths as $skin_path) {
if ($this->assets_dir != RCUBE_INSTALL_PATH) {
if (realpath($this->assets_dir . $skin_path . $file)) {
return $skin_path;
}
}
if (realpath(RCUBE_INSTALL_PATH . $skin_path . $file)) {
return $skin_path;
}
}
}
/**
* Register a GUI object to the client script
*
* @param string $obj Object name
* @param string $id Object ID
*/
public function add_gui_object($obj, $id)
{
$this->add_script(self::JS_OBJECT_NAME.".gui_object('$obj', '$id');");
}
/**
* Call a client method
*
* @param string Method to call
* @param ... Additional arguments
*/
public function command()
{
$cmd = func_get_args();
if (strpos($cmd[0], 'plugin.') !== false)
$this->js_commands[] = array('triggerEvent', $cmd[0], $cmd[1]);
else
$this->js_commands[] = $cmd;
}
/**
* Add a localized label to the client environment
*/
public function add_label()
{
$args = func_get_args();
if (count($args) == 1 && is_array($args[0])) {
$args = $args[0];
}
foreach ($args as $name) {
$this->js_labels[$name] = $this->app->gettext($name);
}
}
/**
* Invoke display_message command
*
* @param string $message Message to display
* @param string $type Message type [notice|confirm|error]
* @param array $vars Key-value pairs to be replaced in localized text
* @param boolean $override Override last set message
* @param int $timeout Message display time in seconds
*
* @uses self::command()
*/
public function show_message($message, $type='notice', $vars=null, $override=true, $timeout=0)
{
if ($override || !$this->message) {
if ($this->app->text_exists($message)) {
if (!empty($vars))
$vars = array_map(array('rcube','Q'), $vars);
$msgtext = $this->app->gettext(array('name' => $message, 'vars' => $vars));
}
else
$msgtext = $message;
$this->message = $message;
$this->command('display_message', $msgtext, $type, $timeout * 1000);
}
}
/**
* Delete all stored env variables and commands
*
* @param bool $all Reset all env variables (including internal)
*/
public function reset($all = false)
{
$framed = $this->framed;
$task = $this->env['task'];
$env = $all ? null : array_intersect_key($this->env, array('extwin'=>1, 'framed'=>1));
// keep jQuery-UI files
$css_files = $script_files = array();
foreach ($this->css_files as $file) {
if (strpos($file, 'plugins/jqueryui') === 0) {
$css_files[] = $file;
}
}
foreach ($this->script_files as $position => $files) {
foreach ($files as $file) {
if (strpos($file, 'plugins/jqueryui') === 0) {
$script_files[$position][] = $file;
}
}
}
parent::reset();
// let some env variables survive
$this->env = $this->js_env = $env;
$this->framed = $framed || $this->env['framed'];
$this->js_labels = array();
$this->js_commands = array();
$this->scripts = array();
$this->header = '';
$this->footer = '';
$this->body = '';
$this->css_files = array();
$this->script_files = array();
// load defaults
if (!$all) {
$this->__construct();
}
// Note: we merge jQuery-UI scripts after jQuery...
$this->css_files = array_merge($this->css_files, $css_files);
$this->script_files = array_merge_recursive($this->script_files, $script_files);
$this->set_env('orig_task', $task);
}
/**
* Redirect to a certain url
*
* @param mixed $p Either a string with the action or url parameters as key-value pairs
* @param int $delay Delay in seconds
* @param bool $secure Redirect to secure location (see rcmail::url())
*/
public function redirect($p = array(), $delay = 1, $secure = false)
{
if ($this->env['extwin'])
$p['extwin'] = 1;
$location = $this->app->url($p, false, false, $secure);
header('Location: ' . $location);
exit;
}
/**
* Send the request output to the client.
* This will either parse a skin template.
*
* @param string $templ Template name
* @param boolean $exit True if script should terminate (default)
*/
public function send($templ = null, $exit = true)
{
if ($templ != 'iframe') {
// prevent from endless loops
if ($exit != 'recur' && $this->app->plugins->is_processing('render_page')) {
rcube::raise_error(array('code' => 505, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => 'Recursion alert: ignoring output->send()'), true, false);
return;
}
$this->parse($templ, false);
}
else {
$this->framed = true;
$this->write();
}
// set output asap
ob_flush();
flush();
if ($exit) {
exit;
}
}
/**
* Process template and write to stdOut
*
* @param string $template HTML template content
*/
public function write($template = '')
{
if (!empty($this->script_files)) {
$this->set_env('request_token', $this->app->get_request_token());
}
// Fix assets path on blankpage
if ($this->js_env['blankpage']) {
$this->js_env['blankpage'] = $this->asset_url($this->abs_url($this->js_env['blankpage'], true));
}
$commands = $this->get_js_commands($framed);
// if all js commands go to parent window we can ignore all
// script files and skip rcube_webmail initialization (#1489792)
// but not on error pages where skins may need jQuery, etc.
if ($framed && empty($this->js_env['server_error'])) {
$this->scripts = array();
$this->script_files = array();
$this->header = '';
$this->footer = '';
}
// write all javascript commands
if (!empty($commands)) {
$this->add_script($commands, 'head_top');
}
$this->page_headers();
// call super method
$this->_write($template);
}
/**
* Send common page headers
* For now it only (re)sets X-Frame-Options when needed
*/
public function page_headers()
{
if (headers_sent()) {
return;
}
// allow (legal) iframe content to be loaded
$framed = $this->framed || $this->env['framed'];
if ($framed && ($xopt = $this->app->config->get('x_frame_options', 'sameorigin'))) {
if (strtolower($xopt) === 'deny') {
header('X-Frame-Options: sameorigin', true);
}
}
}
/**
* Parse a specific skin template and deliver to stdout (or return)
*
* @param string $name Template name
* @param boolean $exit Exit script
* @param boolean $write Don't write to stdout, return parsed content instead
*
* @link http://php.net/manual/en/function.exit.php
*/
function parse($name = 'main', $exit = true, $write = true)
{
$plugin = false;
$realname = $name;
$plugin_skin_paths = array();
$this->template_name = $realname;
$temp = explode('.', $name, 2);
if (count($temp) > 1) {
$plugin = $temp[0];
$name = $temp[1];
$skin_dir = $plugin . '/skins/' . $this->config->get('skin');
// apply skin search escalation list to plugin directory
foreach ($this->skin_paths as $skin_path) {
$plugin_skin_paths[] = $this->app->plugins->url . $plugin . '/' . $skin_path;
}
// prepend plugin skin paths to search list
$this->skin_paths = array_merge($plugin_skin_paths, $this->skin_paths);
}
// find skin template
$path = false;
foreach ($this->skin_paths as $skin_path) {
// when requesting a plugin template ignore global skin path(s)
if ($plugin && strpos($skin_path, $this->app->plugins->url) !== 0) {
continue;
}
$path = RCUBE_INSTALL_PATH . "$skin_path/templates/$name.html";
// fallback to deprecated template names
if (!is_readable($path) && ($dname = $this->deprecated_templates[$realname])) {
$path = RCUBE_INSTALL_PATH . "$skin_path/templates/$dname.html";
if (is_readable($path)) {
rcube::raise_error(array(
'code' => 502, 'file' => __FILE__, 'line' => __LINE__,
'message' => "Using deprecated template '$dname' in $skin_path/templates. Please rename to '$realname'"
), true, false);
}
}
if (is_readable($path)) {
$this->config->set('skin_path', $skin_path);
// set base_path to core skin directory (not plugin's skin)
$this->base_path = preg_replace('!plugins/\w+/!', '', $skin_path);
$skin_dir = preg_replace('!^plugins/!', '', $skin_path);
break;
}
else {
$path = false;
}
}
// read template file
if (!$path || ($templ = @file_get_contents($path)) === false) {
rcube::raise_error(array(
'code' => 404,
'type' => 'php',
'line' => __LINE__,
'file' => __FILE__,
'message' => 'Error loading template for '.$realname
), true, $write);
$this->skin_paths = array_slice($this->skin_paths, count($plugin_skin_paths));
return false;
}
// replace all path references to plugins/... with the configured plugins dir
// and /this/ to the current plugin skin directory
if ($plugin) {
$templ = preg_replace(
array('/\bplugins\//', '/(["\']?)\/this\//'),
array($this->app->plugins->url, '\\1'.$this->app->plugins->url.$skin_dir.'/'),
$templ
);
}
// parse for specialtags
$output = $this->parse_conditions($templ);
$output = $this->parse_xml($output);
// trigger generic hook where plugins can put additional content to the page
$hook = $this->app->plugins->exec_hook("render_page", array(
'template' => $realname, 'content' => $output, 'write' => $write));
// save some memory
$output = $hook['content'];
unset($hook['content']);
// remove plugin skin paths from current context
$this->skin_paths = array_slice($this->skin_paths, count($plugin_skin_paths));
if (!$write) {
return $this->postrender($output);
}
$this->write(trim($output));
if ($exit) {
exit;
}
}
/**
* Return executable javascript code for all registered commands
*/
protected function get_js_commands(&$framed = null)
{
$out = '';
$parent_commands = 0;
$top_commands = array();
// these should be always on top,
// e.g. hide_message() below depends on env.framed
if (!$this->framed && !empty($this->js_env)) {
$top_commands[] = array('set_env', $this->js_env);
}
if (!empty($this->js_labels)) {
$top_commands[] = array('add_label', $this->js_labels);
}
// unlock interface after iframe load
$unlock = preg_replace('/[^a-z0-9]/i', '', $_REQUEST['_unlock']);
if ($this->framed) {
$top_commands[] = array('iframe_loaded', $unlock);
}
else if ($unlock) {
$top_commands[] = array('hide_message', $unlock);
}
$commands = array_merge($top_commands, $this->js_commands);
foreach ($commands as $i => $args) {
$method = array_shift($args);
$parent = $this->framed || preg_match('/^parent\./', $method);
foreach ($args as $i => $arg) {
$args[$i] = self::json_serialize($arg, $this->devel_mode);
}
if ($parent) {
$parent_commands++;
$method = preg_replace('/^parent\./', '', $method);
$parent_prefix = 'if (window.parent && parent.' . self::JS_OBJECT_NAME . ') parent.';
$method = $parent_prefix . self::JS_OBJECT_NAME . '.' . $method;
}
else {
$method = self::JS_OBJECT_NAME . '.' . $method;
}
$out .= sprintf("%s(%s);\n", $method, implode(',', $args));
}
$framed = $parent_prefix && $parent_commands == count($commands);
// make the output more compact if all commands go to parent window
if ($framed) {
$out = "if (window.parent && parent." . self::JS_OBJECT_NAME . ") {\n"
. str_replace($parent_prefix, "\tparent.", $out)
. "}\n";
}
return $out;
}
/**
* Make URLs starting with a slash point to skin directory
*
* @param string $str Input string
* @param bool $search_path True if URL should be resolved using the current skin path stack
*
* @return string URL
*/
public function abs_url($str, $search_path = false)
{
if ($str[0] == '/') {
if ($search_path && ($file_url = $this->get_skin_file($str))) {
return $file_url;
}
return $this->base_path . $str;
}
return $str;
}
/**
* Show error page and terminate script execution
*
* @param int $code Error code
* @param string $message Error message
*/
public function raise_error($code, $message)
{
global $__page_content, $ERROR_CODE, $ERROR_MESSAGE;
$ERROR_CODE = $code;
$ERROR_MESSAGE = $message;
include RCUBE_INSTALL_PATH . 'program/steps/utils/error.inc';
exit;
}
/**
* Modify path by adding URL prefix if configured
*
* @param string $path Asset path
* @param bool $abs_url Pass to self::abs_url() first
*
* @return string Asset path
*/
public function asset_url($path, $abs_url = false)
{
// iframe content can't be in a different domain
// @TODO: check if assests are on a different domain
if ($abs_url) {
$path = $this->abs_url($path, true);
}
if (!$this->assets_path || in_array($path[0], array('?', '/', '.')) || strpos($path, '://')) {
return $path;
}
return $this->assets_path . $path;
}
/***** Template parsing methods *****/
/**
* Replace all strings ($varname)
* with the content of the according global variable.
*/
protected function parse_with_globals($input)
{
$GLOBALS['__version'] = html::quote(RCMAIL_VERSION);
$GLOBALS['__comm_path'] = html::quote($this->app->comm_path);
$GLOBALS['__skin_path'] = html::quote($this->base_path);
return preg_replace_callback('/\$(__[a-z0-9_\-]+)/',
array($this, 'globals_callback'), $input);
}
/**
* Callback function for preg_replace_callback() in parse_with_globals()
*/
protected function globals_callback($matches)
{
return $GLOBALS[$matches[1]];
}
/**
* Correct absolute paths in images and other tags (add cache busters)
*/
protected function fix_paths($output)
{
return preg_replace_callback(
'!(src|href|background|data-src-[a-z]+)=(["\']?)([a-z0-9/_.-]+)(["\'\s>])!i',
array($this, 'file_callback'), $output);
}
/**
* Callback function for preg_replace_callback in fix_paths()
*
* @return string Parsed string
*/
protected function file_callback($matches)
{
$file = $matches[3];
$file = preg_replace('!^/this/!', '/', $file);
// correct absolute paths
if ($file[0] == '/') {
$this->get_skin_file($file, $skin_path, $this->base_path);
$file = ($skin_path ?: $this->base_path) . $file;
}
// add file modification timestamp
if (preg_match('/\.(js|css|less|ico|png|svg|jpeg)$/', $file)) {
$file = $this->file_mod($file);
}
return $matches[1] . '=' . $matches[2] . $file . $matches[4];
}
/**
* Correct paths of asset files according to assets_path
*/
protected function fix_assets_paths($output)
{
return preg_replace_callback(
'!(src|href|background)=(["\']?)([a-z0-9/_.?=-]+)(["\'\s>])!i',
array($this, 'assets_callback'), $output);
}
/**
* Callback function for preg_replace_callback in fix_assets_paths()
*
* @return string Parsed string
*/
protected function assets_callback($matches)
{
$file = $this->asset_url($matches[3]);
return $matches[1] . '=' . $matches[2] . $file . $matches[4];
}
/**
* Modify file by adding mtime indicator
*/
protected function file_mod($file)
{
$fs = false;
$ext = substr($file, strrpos($file, '.') + 1);
// use minified file if exists (not in development mode)
if (!$this->devel_mode && !preg_match('/\.min\.' . $ext . '$/', $file)) {
$minified_file = substr($file, 0, strlen($ext) * -1) . 'min.' . $ext;
if ($fs = @filemtime($this->assets_dir . $minified_file)) {
return $minified_file . '?s=' . $fs;
}
}
if ($fs = @filemtime($this->assets_dir . $file)) {
$file .= '?s=' . $fs;
}
return $file;
}
/**
* Public wrapper to dipp into template parsing.
*
* @param string $input Template content
*
* @return string
* @uses rcmail_output_html::parse_xml()
* @since 0.1-rc1
*/
public function just_parse($input)
{
$input = $this->parse_conditions($input);
$input = $this->parse_xml($input);
$input = $this->postrender($input);
return $input;
}
/**
* Parse for conditional tags
*/
protected function parse_conditions($input)
{
$matches = preg_split('/]+)>\n?/is', $input, 2, PREG_SPLIT_DELIM_CAPTURE);
if ($matches && count($matches) == 4) {
if (preg_match('/^(else|endif)$/i', $matches[1])) {
return $matches[0] . $this->parse_conditions($matches[3]);
}
$attrib = html::parse_attrib_string($matches[2]);
if (isset($attrib['condition'])) {
$condmet = $this->check_condition($attrib['condition']);
$submatches = preg_split('/]+)>\n?/is', $matches[3], 2, PREG_SPLIT_DELIM_CAPTURE);
if ($condmet) {
$result = $submatches[0];
if ($submatches[1] != 'endif') {
$result .= preg_replace('/.*]+>\n?/Uis', '', $submatches[3], 1);
}
else {
$result .= $submatches[3];
}
}
else {
$result = "" . $submatches[3];
}
return $matches[0] . $this->parse_conditions($result);
}
rcube::raise_error(array(
'code' => 500, 'line' => __LINE__, 'file' => __FILE__,
'message' => "Unable to parse conditional tag " . $matches[2]
), true, false);
}
return $input;
}
/**
* Determines if a given condition is met
*
* @param string $condition Condition statement
*
* @return boolean True if condition is met, False if not
* @todo Extend this to allow real conditions, not just "set"
*/
protected function check_condition($condition)
{
return $this->eval_expression($condition);
}
/**
* Inserts hidden field with CSRF-prevention-token into POST forms
*/
protected function alter_form_tag($matches)
{
$out = $matches[0];
$attrib = html::parse_attrib_string($matches[1]);
if (strtolower($attrib['method']) == 'post') {
$hidden = new html_hiddenfield(array('name' => '_token', 'value' => $this->app->get_request_token()));
$out .= "\n" . $hidden->show();
}
return $out;
}
/**
* Parse & evaluate a given expression and return its result.
*
* @param string $expression Expression statement
*
* @return mixed Expression result
*/
protected function eval_expression($expression)
{
$expression = preg_replace(
array(
'/session:([a-z0-9_]+)/i',
'/config:([a-z0-9_]+)(:([a-z0-9_]+))?/i',
'/env:([a-z0-9_]+)/i',
'/request:([a-z0-9_]+)/i',
'/cookie:([a-z0-9_]+)/i',
'/browser:([a-z0-9_]+)/i',
'/template:name/i',
),
array(
"\$_SESSION['\\1']",
"\$this->app->config->get('\\1',rcube_utils::get_boolean('\\3'))",
"\$this->env['\\1']",
"rcube_utils::get_input_value('\\1', rcube_utils::INPUT_GPC)",
"\$_COOKIE['\\1']",
"\$this->browser->{'\\1'}",
"'{$this->template_name}'",
),
$expression
);
// Note: We used create_function() before but it's deprecated in PHP 7.2
// and really it was just a wrapper on eval().
return eval("return ($expression);");
}
/**
* Parse variable strings
*
* @param string $type Variable type (env, config etc)
* @param string $name Variable name
*
* @return mixed Variable value
*/
protected function parse_variable($type, $name)
{
$value = '';
switch ($type) {
case 'env':
$value = $this->env[$name];
break;
case 'config':
$value = $this->config->get($name);
if (is_array($value) && $value[$_SESSION['storage_host']]) {
$value = $value[$_SESSION['storage_host']];
}
break;
case 'request':
$value = rcube_utils::get_input_value($name, rcube_utils::INPUT_GPC);
break;
case 'session':
$value = $_SESSION[$name];
break;
case 'cookie':
$value = htmlspecialchars($_COOKIE[$name], ENT_COMPAT | ENT_HTML401, RCUBE_CHARSET);
break;
case 'browser':
$value = $this->browser->{$name};
break;
}
return $value;
}
/**
* Search for special tags in input and replace them
* with the appropriate content
*
* @param string $input Input string to parse
*
* @return string Altered input string
* @todo Use DOM-parser to traverse template HTML
* @todo Maybe a cache.
*/
protected function parse_xml($input)
{
return preg_replace_callback('/]|\\\\>)+)(?/Ui', array($this, 'xml_command'), $input);
}
/**
* Callback function for parsing an xml command tag
* and turn it into real html content
*
* @param array $matches Matches array of preg_replace_callback
*
* @return string Tag/Object content
*/
protected function xml_command($matches)
{
$command = strtolower($matches[1]);
$attrib = html::parse_attrib_string($matches[2]);
// empty output if required condition is not met
if (!empty($attrib['condition']) && !$this->check_condition($attrib['condition'])) {
return '';
}
// localize title and summary attributes
if ($command != 'button' && !empty($attrib['title']) && $this->app->text_exists($attrib['title'])) {
$attrib['title'] = $this->app->gettext($attrib['title']);
}
if ($command != 'button' && !empty($attrib['summary']) && $this->app->text_exists($attrib['summary'])) {
$attrib['summary'] = $this->app->gettext($attrib['summary']);
}
// execute command
switch ($command) {
// return a button
case 'button':
if ($attrib['name'] || $attrib['command']) {
return $this->button($attrib);
}
break;
// frame
case 'frame':
return $this->frame($attrib);
break;
// show a label
case 'label':
if ($attrib['expression'])
$attrib['name'] = $this->eval_expression($attrib['expression']);
if ($attrib['name'] || $attrib['command']) {
$vars = $attrib + array('product' => $this->config->get('product_name'));
unset($vars['name'], $vars['command']);
$label = $this->app->gettext($attrib + array('vars' => $vars));
$quoting = !empty($attrib['quoting']) ? strtolower($attrib['quoting']) : (rcube_utils::get_boolean((string)$attrib['html']) ? 'no' : '');
// 'noshow' can be used in skins to define new labels
if ($attrib['noshow']) {
return '';
}
switch ($quoting) {
case 'no':
case 'raw':
break;
case 'javascript':
case 'js':
$label = rcube::JQ($label);
break;
default:
$label = html::quote($label);
break;
}
return $label;
}
break;
case 'add_label':
$this->add_label($attrib['name']);
break;
// include a file
case 'include':
if ($attrib['condition'] && !$this->check_condition($attrib['condition'])) {
break;
}
if ($attrib['file'][0] != '/') {
$attrib['file'] = '/templates/' . $attrib['file'];
}
$old_base_path = $this->base_path;
$include = '';
if (!empty($attrib['skin_path'])) {
$attrib['skinpath'] = $attrib['skin_path'];
}
if ($path = $this->get_skin_file($attrib['file'], $skin_path, $attrib['skinpath'])) {
// set base_path to core skin directory (not plugin's skin)
$this->base_path = preg_replace('!plugins/\w+/!', '', $skin_path);
$path = realpath(RCUBE_INSTALL_PATH . $path);
}
if (is_readable($path)) {
$allow_php = $this->config->get('skin_include_php');
$include = $allow_php ? $this->include_php($path) : file_get_contents($path);
$include = $this->parse_conditions($include);
$include = $this->parse_xml($include);
$include = $this->fix_paths($include);
}
$this->base_path = $old_base_path;
return $include;
case 'plugin.include':
$hook = $this->app->plugins->exec_hook("template_plugin_include", $attrib);
return $hook['content'];
// define a container block
case 'container':
if ($attrib['name'] && $attrib['id']) {
$this->command('gui_container', $attrib['name'], $attrib['id']);
// let plugins insert some content here
$hook = $this->app->plugins->exec_hook("template_container", $attrib);
return $hook['content'];
}
break;
// return code for a specific application object
case 'object':
$object = strtolower($attrib['name']);
$content = '';
// correct deprecated object names
if ($this->deprecated_template_objects[$object]) {
$object = $this->deprecated_template_objects[$object];
}
$handler = $this->object_handlers[$object];
// execute object handler function
if (is_callable($handler)) {
$this->prepare_object_attribs($attrib);
// We assume that objects with src attribute are internal (in most
// cases this is a watermark frame). We need this to make sure assets_path
// is added to the internal assets paths
$external = empty($attrib['src']);
$content = call_user_func($handler, $attrib);
}
else if ($object == 'doctype') {
$content = html::doctype($attrib['value']);
}
else if ($object == 'logo') {
$attrib += array('alt' => $this->xml_command(array('', 'object', 'name="productname"')));
if (!empty($attrib['type']) && ($template_logo = $this->get_template_logo($attrib['type'])) !== null) {
$attrib['src'] = $template_logo;
}
else if (($template_logo = $this->get_template_logo()) !== null) {
$attrib['src'] = $template_logo;
}
// process alternative logos (eg for Elastic small screen)
foreach ($attrib as $key => $value) {
if (preg_match('/data-src-(.*)/', $key, $matches)) {
if (($template_logo = $this->get_template_logo($matches[1])) !== null) {
$attrib[$key] = $template_logo;
}
$attrib[$key] = !empty($attrib[$key]) ? $this->abs_url($attrib[$key]) : null;
}
}
if ($attrib['src']) {
$content = html::img($attrib);
}
}
else if ($object == 'productname') {
$name = $this->config->get('product_name', 'Roundcube Webmail');
$content = html::quote($name);
}
else if ($object == 'version') {
$ver = (string)RCMAIL_VERSION;
if (is_file(RCUBE_INSTALL_PATH . '.svn/entries')) {
if (preg_match('/Revision:\s(\d+)/', @shell_exec('svn info'), $regs))
$ver .= ' [SVN r'.$regs[1].']';
}
else if (is_file(RCUBE_INSTALL_PATH . '.git/index')) {
if (preg_match('/Date:\s+([^\n]+)/', @shell_exec('git log -1'), $regs)) {
if ($date = date('Ymd.Hi', strtotime($regs[1]))) {
$ver .= ' [GIT '.$date.']';
}
}
}
$content = html::quote($ver);
}
else if ($object == 'steptitle') {
$content = html::quote($this->get_pagetitle(false));
}
else if ($object == 'pagetitle') {
// Deprecated, will be added automatically
$content = html::quote($this->get_pagetitle());
}
else if ($object == 'contentframe') {
if (empty($attrib['id'])) {
$attrib['id'] = 'rcm' . $this->env['task'] . 'frame';
}
// parse variables
if (preg_match('/^(config|env):([a-z0-9_]+)$/i', $attrib['src'], $matches)) {
$attrib['src'] = $this->parse_variable($matches[1], $matches[2]);
}
$content = $this->frame($attrib, true);
}
else if ($object == 'meta' || $object == 'links') {
if ($object == 'meta') {
$source = 'meta_tags';
$tag = 'meta';
$key = 'name';
$param = 'content';
}
else if ($object == 'links') {
$source = 'link_tags';
$tag = 'link';
$key = 'rel';
$param = 'href';
}
foreach ($this->$source as $name => $vars) {
// $vars can be in many forms:
// - string
// - array('key' => 'val')
// - array(string, string)
// - array(array(), string)
// - array(array('key' => 'val'), array('key' => 'val'))
// normalise this for processing by checking for string array keys
$vars = is_array($vars) ? (count(array_filter(array_keys($vars), 'is_string')) > 0 ? array($vars) : $vars) : array($vars);
foreach ($vars as $args) {
// skip unset headers e.g. when extending a skin and removing a header defined in the parent
if ($args === false) {
continue;
}
$args = is_array($args) ? $args : array($param => $args);
// special handling for favicon
if ($object == 'links' && $name == 'shortcut icon' && empty($args[$param])) {
if ($href = $this->get_template_logo('favicon')) {
$args[$param] = $href;
}
else if ($href = $this->config->get('favicon', '/images/favicon.ico')) {
$args[$param] = $href;
}
}
$content .= html::tag($tag, array($key => $name, 'nl' => true) + $args);
}
}
}
// exec plugin hooks for this template object
$hook = $this->app->plugins->exec_hook("template_object_$object", $attrib + array('content' => $content));
if (strlen($hook['content']) && !empty($external)) {
$object_id = uniqid('TEMPLOBJECT:', true);
$this->objects[$object_id] = $hook['content'];
$hook['content'] = $object_id;
}
return $hook['content'];
// return <link> element
case 'link':
if ($attrib['condition'] && !$this->check_condition($attrib['condition'])) {
break;
}
unset($attrib['condition']);
return html::tag('link', $attrib);
// return code for a specified eval expression
case 'exp':
return html::quote($this->eval_expression($attrib['expression']));
// return variable
case 'var':
$var = explode(':', $attrib['name']);
$value = $this->parse_variable($var[0], $var[1]);
if (is_array($value)) {
$value = implode(', ', $value);
}
return html::quote($value);
case 'form':
return $this->form_tag($attrib);
}
return '';
}
/**
* Prepares template object attributes
*
* @param array &$attribs Attributes
*/
protected function prepare_object_attribs(&$attribs)
{
// Localize data-label-* attributes
array_walk($attribs, function(&$value, $key, $rcube) {
if (strpos($key, 'data-label-') === 0) {
$value = $rcube->gettext($value);
}
}, $this->app);
}
/**
* Include a specific file and return it's contents
*
* @param string $file File path
*
* @return string Contents of the processed file
*/
protected function include_php($file)
{
ob_start();
include $file;
$out = ob_get_contents();
ob_end_clean();
return $out;
}
/**
* Put objects' content back into template output
*/
protected function postrender($output)
{
// insert objects' contents
foreach ($this->objects as $key => $val) {
$output = str_replace($key, $val, $output, $count);
if ($count) {
$this->objects[$key] = null;
}
}
// make sure all <form> tags have a valid request token
$output = preg_replace_callback('/<form\s+([^>]+)>/Ui', array($this, 'alter_form_tag'), $output);
return $output;
}
/**
* Create and register a button
*
* @param array $attrib Named button attributes
*
* @return string HTML button
* @todo Remove all inline JS calls and use jQuery instead.
* @todo Remove all sprintf()'s - they are pretty, but also slow.
*/
public function button($attrib)
{
static $s_button_count = 100;
static $disabled_actions = null;
// these commands can be called directly via url
$a_static_commands = array('compose', 'list', 'preferences', 'folders', 'identities');
if (!($attrib['command'] || $attrib['name'] || $attrib['href'])) {
return '';
}
// try to find out the button type
if ($attrib['type']) {
$attrib['type'] = strtolower($attrib['type']);
if (strpos($attrib['type'], '-menuitem')) {
$attrib['type'] = substr($attrib['type'], 0, -9);
$menuitem = true;
}
}
else {
$attrib['type'] = ($attrib['image'] || $attrib['imagepas'] || $attrib['imageact']) ? 'image' : 'button';
}
$command = $attrib['command'];
$action = $command ?: $attrib['name'];
if ($attrib['task']) {
$command = $attrib['task'] . '.' . $command;
$element = $attrib['task'] . '.' . $action;
}
else {
$element = ($this->env['task'] ? $this->env['task'] . '.' : '') . $action;
}
if ($disabled_actions === null) {
$disabled_actions = (array) $this->config->get('disabled_actions');
}
// remove buttons for disabled actions
if (in_array($element, $disabled_actions) || in_array($action, $disabled_actions)) {
return '';
}
if (!$attrib['image']) {
$attrib['image'] = $attrib['imagepas'] ? $attrib['imagepas'] : $attrib['imageact'];
}
if (!$attrib['id']) {
$attrib['id'] = sprintf('rcmbtn%d', $s_button_count++);
}
// get localized text for labels and titles
if ($attrib['title']) {
$attrib['title'] = html::quote($this->app->gettext($attrib['title'], $attrib['domain']));
}
if ($attrib['label']) {
$attrib['label'] = html::quote($this->app->gettext($attrib['label'], $attrib['domain']));
}
if ($attrib['alt']) {
$attrib['alt'] = html::quote($this->app->gettext($attrib['alt'], $attrib['domain']));
}
// set accessibility attributes
if (!$attrib['role']) {
$attrib['role'] = 'button';
}
if (!empty($attrib['class']) && !empty($attrib['classact']) || !empty($attrib['imagepas']) && !empty($attrib['imageact'])) {
if (array_key_exists('tabindex', $attrib))
$attrib['data-tabindex'] = $attrib['tabindex'];
$attrib['tabindex'] = '-1'; // disable button by default
$attrib['aria-disabled'] = 'true';
}
// set title to alt attribute for IE browsers
if ($this->browser->ie && !$attrib['title'] && $attrib['alt']) {
$attrib['title'] = $attrib['alt'];
}
// add empty alt attribute for XHTML compatibility
if (!isset($attrib['alt'])) {
$attrib['alt'] = '';
}
// register button in the system
if ($attrib['command']) {
$this->add_script(sprintf(
"%s.register_button('%s', '%s', '%s', '%s', '%s', '%s');",
self::JS_OBJECT_NAME,
$command,
$attrib['id'],
$attrib['type'],
$attrib['imageact'] ? $this->abs_url($attrib['imageact']) : $attrib['classact'],
$attrib['imagesel'] ? $this->abs_url($attrib['imagesel']) : $attrib['classsel'],
$attrib['imageover'] ? $this->abs_url($attrib['imageover']) : ''
));
// make valid href to specific buttons
if (in_array($attrib['command'], rcmail::$main_tasks)) {
$attrib['href'] = $this->app->url(array('task' => $attrib['command']));
$attrib['onclick'] = sprintf("return %s.command('switch-task','%s',this,event)", self::JS_OBJECT_NAME, $attrib['command']);
}
else if ($attrib['task'] && in_array($attrib['task'], rcmail::$main_tasks)) {
$attrib['href'] = $this->app->url(array('action' => $attrib['command'], 'task' => $attrib['task']));
}
else if (in_array($attrib['command'], $a_static_commands)) {
$attrib['href'] = $this->app->url(array('action' => $attrib['command']));
}
else if (($attrib['command'] == 'permaurl' || $attrib['command'] == 'extwin') && !empty($this->env['permaurl'])) {
$attrib['href'] = $this->env['permaurl'];
}
}
// overwrite attributes
if (!$attrib['href']) {
$attrib['href'] = '#';
}
if ($attrib['task']) {
if ($attrib['classact']) {
$attrib['class'] = $attrib['classact'];
}
}
else if ($command && !$attrib['onclick']) {
$attrib['onclick'] = sprintf(
"return %s.command('%s','%s',this,event)",
self::JS_OBJECT_NAME,
$command,
$attrib['prop']
);
}
$out = '';
// generate image tag
if ($attrib['type'] == 'image') {
$attrib_str = html::attrib_string(
$attrib,
array(
'style', 'class', 'id', 'width', 'height', 'border', 'hspace',
'vspace', 'align', 'alt', 'tabindex', 'title'
)
);
$btn_content = sprintf('<img src="%s"%s />', $this->abs_url($attrib['image']), $attrib_str);
if ($attrib['label']) {
$btn_content .= ' '.$attrib['label'];
}
$link_attrib = array('href', 'onclick', 'onmouseover', 'onmouseout', 'onmousedown', 'onmouseup', 'target');
}
else if ($attrib['type'] == 'link') {
$btn_content = isset($attrib['content']) ? $attrib['content'] : ($attrib['label'] ? $attrib['label'] : $attrib['command']);
$link_attrib = array_merge(html::$common_attrib, array('href', 'onclick', 'tabindex', 'target', 'rel'));
if ($attrib['innerclass']) {
$btn_content = html::span($attrib['innerclass'], $btn_content);
}
}
else if ($attrib['type'] == 'input') {
$attrib['type'] = 'button';
if ($attrib['label']) {
$attrib['value'] = $attrib['label'];
}
if ($attrib['command']) {
$attrib['disabled'] = 'disabled';
}
$out = html::tag('input', $attrib, null, array('type', 'value', 'onclick', 'id', 'class', 'style', 'tabindex', 'disabled'));
}
else {
if ($attrib['label']) {
$attrib['value'] = $attrib['label'];
}
if ($attrib['command']) {
$attrib['disabled'] = 'disabled';
}
$content = isset($attrib['content']) ? $attrib['content'] : $attrib['label'];
$out = html::tag('button', $attrib, $content, array('type', 'value', 'onclick', 'id', 'class', 'style', 'tabindex', 'disabled'));
}
// generate html code for button
if ($btn_content) {
$attrib_str = html::attrib_string($attrib, $link_attrib);
$out = sprintf('<a%s>%s</a>', $attrib_str, $btn_content);
}
if ($attrib['wrapper']) {
$out = html::tag($attrib['wrapper'], null, $out);
}
if ($menuitem) {
$class = $attrib['menuitem-class'] ? ' class="' . $attrib['menuitem-class'] . '"' : '';
$out = '<li role="menuitem"' . $class . '>' . $out . '</li>';
}
return $out;
}
/**
* Link an external script file
*
* @param string $file File URL
* @param string $position Target position [head|head_bottom|foot]
*/
public function include_script($file, $position = 'head', $add_path = true)
{
if ($add_path && !preg_match('|^https?://|i', $file) && $file[0] != '/') {
$file = $this->file_mod($this->scripts_path . $file);
}
if (!is_array($this->script_files[$position])) {
$this->script_files[$position] = array();
}
if (!in_array($file, $this->script_files[$position])) {
$this->script_files[$position][] = $file;
}
}
/**
* Add inline javascript code
*
* @param string $script JS code snippet
* @param string $position Target position [head|head_top|foot|docready]
*/
public function add_script($script, $position = 'head')
{
if (!isset($this->scripts[$position])) {
$this->scripts[$position] = rtrim($script);
}
else {
$this->scripts[$position] .= "\n" . rtrim($script);
}
}
/**
* Link an external css file
*
* @param string $file File URL
*/
public function include_css($file)
{
$this->css_files[] = $file;
}
/**
* Add HTML code to the page header
*
* @param string $str HTML code
*/
public function add_header($str)
{
$this->header .= "\n" . $str;
}
/**
* Add HTML code to the page footer
* To be added right befor </body>
*
* @param string $str HTML code
*/
public function add_footer($str)
{
$this->footer .= "\n" . $str;
}
/**
* Process template and write to stdOut
*
* @param string $output HTML output
*/
protected function _write($output = '')
{
$output = trim($output);
if (empty($output)) {
$output = html::doctype('html5') . "\n" . $this->default_template;
$is_empty = true;
}
$merge_script_files = function($output, $script) {
return $output . html::script($script);
};
$merge_scripts = function($output, $script) {
return $output . html::script(array(), $script);
};
// put docready commands into page footer
if (!empty($this->scripts['docready'])) {
$this->add_script("\$(function() {\n" . $this->scripts['docready'] . "\n});", 'foot');
}
$page_header = '';
$page_footer = '';
$meta = '';
// declare page language
if (!empty($_SESSION['language'])) {
$lang = substr($_SESSION['language'], 0, 2);
$output = preg_replace('/<html/', '<html lang="' . html::quote($lang) . '"', $output, 1);
if (!headers_sent()) {
header('Content-Language: ' . $lang);
}
}
// include meta tag with charset
if (!empty($this->charset)) {
if (!headers_sent()) {
header('Content-Type: text/html; charset=' . $this->charset);
}
$meta .= html::tag('meta', array(
'http-equiv' => 'content-type',
'content' => "text/html; charset={$this->charset}",
'nl' => true
));
}
// include page title (after charset specification)
$meta .= '<title>' . html::quote($this->get_pagetitle()) . "\n";
$output = preg_replace('/(]*>)\n*/i', "\\1\n{$meta}", $output, 1, $count);
if (!$count) {
$page_header .= $meta;
}
// include scripts into header/footer
$page_header .= array_reduce((array) $this->script_files['head'], $merge_script_files);
$page_header .= array_reduce(array($this->scripts['head_top'] . $this->scripts['head']), $merge_scripts);
$page_header .= $this->header . "\n";
$page_header .= array_reduce((array) $this->script_files['head_bottom'], $merge_script_files);
$page_footer .= array_reduce((array) $this->script_files['foot'], $merge_script_files);
$page_footer .= $this->footer . "\n";
$page_footer .= array_reduce((array) $this->scripts['foot'], $merge_scripts);
// find page header
if ($hpos = stripos($output, '')) {
$page_header .= "\n";
}
else {
if (!is_numeric($hpos)) {
$hpos = stripos($output, '')) || ($fpos = strripos($output, '