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140 lines
4.5 KiB
PHP
140 lines
4.5 KiB
PHP
<?php
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/**
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* Smarty plugin
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*
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* @package Smarty
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* @subpackage PluginsFunction
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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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* 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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*
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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>
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* @version 1.0
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* @param array $params parameters
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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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* - path_prefix = prefix for path output (optional, default empty)
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* @param object $smarty Smarty object
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* @param object $template template object
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* @return string
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* @uses smarty_function_escape_special_chars()
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*/
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function smarty_function_html_image($params, $smarty, $template)
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{
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require_once(SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php');
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//$smarty->loadPlugin('Smarty_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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$suffix = '';
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$path_prefix = '';
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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 'path_prefix':
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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($_val);
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} else {
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throw new Exception ("html_image: extra attribute '$_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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throw new Exception ("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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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($params['height'])) {
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if (!$_image_data = @getimagesize($_image_path)) {
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if (!file_exists($_image_path)) {
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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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trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
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return;
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} else {
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trigger_error("html_image: '$_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 ($template->security) {
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if (!$smarty->security_handler->isTrustedResourceDir($_image_path)) {
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return;
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}
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}
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if (!isset($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="' . $path_prefix . $file . '" alt="' . $alt . '" width="' . $width . '" height="' . $height . '"' . $extra . ' />' . $suffix;
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}
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?>
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