6 * @subpackage PluginsFunction
10 * Smarty {html_image} function plugin
13 * Name: html_image<br>
14 * Date: Feb 24, 2003<br>
15 * Purpose: format HTML tags for the image<br>
16 * Examples: {html_image file="/images/masthead.gif"}
17 * Output: <img src="/images/masthead.gif" width=400 height=23>
19 * @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
20 * (Smarty online manual)
21 * @author Monte Ohrt <monte at ohrt dot com>
22 * @author credits to Duda <duda@big.hu>
24 * @param array $params parameters
26 * - file = file (and path) of image (required)
27 * - height = image height (optional, default actual height)
28 * - width = image width (optional, default actual width)
29 * - basedir = base directory for absolute paths, default
30 * is environment variable DOCUMENT_ROOT
31 * - path_prefix = prefix for path output (optional, default empty)
32 * @param object $template template object
34 * @uses smarty_function_escape_special_chars()
36 function smarty_function_html_image($params, $template)
38 require_once(SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php');
48 $server_vars = $_SERVER;
49 $basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
50 foreach($params as $_key => $_val) {
62 if (!is_array($_val)) {
63 $$_key = smarty_function_escape_special_chars($_val);
65 throw new SmartyException ("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
71 $prefix = '<a href="' . $_val . '">';
76 if (!is_array($_val)) {
77 $extra .= ' ' . $_key . '="' . smarty_function_escape_special_chars($_val) . '"';
79 throw new SmartyException ("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
86 trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
90 if (substr($file, 0, 1) == '/') {
91 $_image_path = $basedir . $file;
96 if (!isset($params['width']) || !isset($params['height'])) {
97 if (!$_image_data = @getimagesize($_image_path)) {
98 if (!file_exists($_image_path)) {
99 trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
101 } else if (!is_readable($_image_path)) {
102 trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
105 trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
109 if (isset($template->security_policy)) {
110 if (!$template->security_policy->isTrustedResourceDir($_image_path)) {
115 if (!isset($params['width'])) {
116 $width = $_image_data[0];
118 if (!isset($params['height'])) {
119 $height = $_image_data[1];
123 if (isset($params['dpi'])) {
124 if (strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
129 $_resize = $dpi_default / $params['dpi'];
130 $width = round($width * $_resize);
131 $height = round($height * $_resize);
134 return $prefix . '<img src="' . $path_prefix . $file . '" alt="' . $alt . '" width="' . $width . '" height="' . $height . '"' . $extra . ' />' . $suffix;