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140 lines
4.5 KiB
PHP
140 lines
4.5 KiB
PHP
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<?php
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/**
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* Smarty plugin
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* @package Smarty
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* @subpackage plugins
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*/
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/**
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* Smarty {html_image} function plugin
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*
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* Type: function<br>
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* Name: html_image<br>
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* Date: Feb 24, 2003<br>
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* Purpose: format HTML tags for the image<br>
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* Input:<br>
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* - file = file (and path) of image (required)
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* - height = image height (optional, default actual height)
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* - width = image width (optional, default actual width)
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* - basedir = base directory for absolute paths, default
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* is environment variable DOCUMENT_ROOT
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*
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* Examples: {html_image file="images/masthead.gif"}
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* Output: <img src="images/masthead.gif" width=400 height=23>
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* @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
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* (Smarty online manual)
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* @author Monte Ohrt <monte at ohrt dot com>
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* @author credits to Duda <duda@big.hu> - wrote first image function
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* in repository, helped with lots of functionality
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* @version 1.0
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* @param array
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* @param Smarty
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* @return string
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* @uses smarty_function_escape_special_chars()
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*/
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function smarty_function_html_image($params, &$smarty)
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{
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require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
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$alt = '';
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$file = '';
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$height = '';
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$width = '';
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$extra = '';
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$prefix = '';
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$suffix = '';
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$server_vars = ($smarty->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
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$basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
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foreach($params as $_key => $_val) {
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switch($_key) {
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case 'file':
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case 'height':
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case 'width':
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case 'dpi':
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case 'basedir':
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$$_key = $_val;
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break;
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case 'alt':
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if(!is_array($_val)) {
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$$_key = smarty_function_escape_special_chars($_val);
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} else {
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$smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
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}
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break;
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case 'link':
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case 'href':
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$prefix = '<a href="' . $_val . '">';
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$suffix = '</a>';
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break;
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default:
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if(!is_array($_val)) {
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$extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
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} else {
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$smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
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}
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break;
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}
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}
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if (empty($file)) {
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$smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
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return;
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}
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if (substr($file,0,1) == '/') {
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$_image_path = $basedir . $file;
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} else {
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$_image_path = $file;
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}
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if(!isset($params['width']) || !isset($params['height'])) {
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if ($smarty->security &&
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($_params = array('resource_type' => 'file', 'resource_name' => $_image_path)) &&
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(require_once(SMARTY_CORE_DIR . 'core.is_secure.php')) &&
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(!smarty_core_is_secure($_params, $smarty)) ) {
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$smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory", E_USER_NOTICE);
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} elseif (!$_image_data = @getimagesize($_image_path)) {
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if(!file_exists($_image_path)) {
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$smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
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return;
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} else if(!is_readable($_image_path)) {
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$smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
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return;
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} else {
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$smarty->trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
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return;
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}
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}
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if(!isset($params['width'])) {
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$width = $_image_data[0];
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}
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if(!isset($params['height'])) {
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$height = $_image_data[1];
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}
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}
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if(isset($params['dpi'])) {
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if(strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
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$dpi_default = 72;
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} else {
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$dpi_default = 96;
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}
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$_resize = $dpi_default/$params['dpi'];
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$width = round($width * $_resize);
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$height = round($height * $_resize);
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}
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return $prefix . '<img src="'.$file.'" alt="'.$alt.'" width="'.$width.'" height="'.$height.'"'.$extra.' />' . $suffix;
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}
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/* vim: set expandtab: */
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?>
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