function.html_image.php
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上传日期:2015-12-05
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文件大小:5k
- <?php
- /**
- * Smarty plugin
- * @package Smarty
- * @subpackage plugins
- */
- /**
- * Smarty {html_image} function plugin
- *
- * Type: function<br>
- * Name: html_image<br>
- * Date: Feb 24, 2003<br>
- * Purpose: format HTML tags for the image<br>
- * Input:<br>
- * - file = file (and path) of image (required)
- * - border = border width (optional, default 0)
- * - height = image height (optional, default actual height)
- * - image =image width (optional, default actual width)
- * - basedir = base directory for absolute paths, default
- * is environment variable DOCUMENT_ROOT
- *
- * Examples: {html_image file="images/masthead.gif"}
- * Output: <img src="images/masthead.gif" border=0 width=400 height=23>
- * @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
- * (Smarty online manual)
- * @author Monte Ohrt <monte@ispi.net>
- * @author credits to Duda <duda@big.hu> - wrote first image function
- * in repository, helped with lots of functionality
- * @version 1.0
- * @param array
- * @param Smarty
- * @return string
- * @uses smarty_function_escape_special_chars()
- */
- function smarty_function_html_image($params, &$smarty)
- {
- require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
-
- $alt = '';
- $file = '';
- $border = 0;
- $height = '';
- $width = '';
- $extra = '';
- $prefix = '';
- $suffix = '';
- $server_vars = ($smarty->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
- $basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
- foreach($params as $_key => $_val) {
- switch($_key) {
- case 'file':
- case 'border':
- case 'height':
- case 'width':
- case 'dpi':
- case 'basedir':
- $$_key = $_val;
- break;
- case 'alt':
- if(!is_array($_val)) {
- $$_key = smarty_function_escape_special_chars($_val);
- } else {
- $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
- }
- break;
- case 'link':
- case 'href':
- $prefix = '<a href="' . $_val . '">';
- $suffix = '</a>';
- break;
- default:
- if(!is_array($_val)) {
- $extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
- } else {
- $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
- }
- break;
- }
- }
- if (empty($file)) {
- $smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
- return;
- }
- if (substr($file,0,1) == '/') {
- $_image_path = $basedir . $file;
- } else {
- $_image_path = $file;
- }
- if(!isset($params['width']) || !isset($params['height'])) {
- if ($smarty->security &&
- ($_params = array('resource_type' => 'file', 'resource_name' => $_image_path)) &&
- (require_once(SMARTY_CORE_DIR . 'core.is_secure.php')) &&
- (!smarty_core_is_secure($_params, $smarty)) ) {
- $smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory", E_USER_NOTICE);
- } elseif (!$_image_data = @getimagesize($_image_path)) {
- if(!file_exists($_image_path)) {
- $smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
- return;
- } else if(!is_readable($_image_path)) {
- $smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
- return;
- } else {
- $smarty->trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
- return;
- }
- }
- if(!isset($params['width'])) {
- $width = $_image_data[0];
- }
- if(!isset($params['height'])) {
- $height = $_image_data[1];
- }
- }
- if(isset($params['dpi'])) {
- if(strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
- $dpi_default = 72;
- } else {
- $dpi_default = 96;
- }
- $_resize = $dpi_default/$params['dpi'];
- $width = round($width * $_resize);
- $height = round($height * $_resize);
- }
- return $prefix . '<img src="'.$file.'" alt="'.$alt.'" border="'.$border.'" width="'.$width.'" height="'.$height.'"'.$extra.' />' . $suffix;
- }
- /* vim: set expandtab: */
- ?>