smarty/Smarty-2.6.10/libs/plugins/function.html_image.php

   1 <?php
   2 /**
   3  * Smarty plugin
   4  * @package Smarty
   5  * @subpackage plugins
   6  */
   7
   8
   9 /**
  10  * Smarty {html_image} function plugin
  11  *
  12  * Type:     function<br>
  13  * Name:     html_image<br>
  14  * Date:     Feb 24, 2003<br>
  15  * Purpose:  format HTML tags for the image<br>
  16  * Input:<br>
  17  *         - file = file (and path) of image (required)
  18  *         - height = image height (optional, default actual height)
  19  *         - width = image width (optional, default actual width)
  20  *         - basedir = base directory for absolute paths, default
  21  *                     is environment variable DOCUMENT_ROOT
  22  *
  23  * Examples: {html_image file="images/masthead.gif"}
  24  * Output:   <img src="images/masthead.gif" width=400 height=23>
  25  * @link http://smarty.php.net/manual/en/language.function.html.image.php {html_image}
  26  *      (Smarty online manual)
  27  * @author   Monte Ohrt <monte at ohrt dot com>
  28  * @author credits to Duda <duda@big.hu> - wrote first image function
  29  *           in repository, helped with lots of functionality
  30  * @version  1.0
  31  * @param array
  32  * @param Smarty
  33  * @return string
  34  * @uses smarty_function_escape_special_chars()
  35  */
  36 function smarty_function_html_image($params, &$smarty)
  37 {
  38     require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
  39
  40     $alt = '';
  41     $file = '';
  42     $height = '';
  43     $width = '';
  44     $extra = '';
  45     $prefix = '';
  46     $suffix = '';
  47     $server_vars = ($smarty->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
  48     $basedir = isset($server_vars['DOCUMENT_ROOT']) ? $server_vars['DOCUMENT_ROOT'] : '';
  49     foreach($params as $_key => $_val) {
  50         switch($_key) {
  51             case 'file':
  52             case 'height':
  53             case 'width':
  54             case 'dpi':
  55             case 'basedir':
  56                 $$_key = $_val;
  57                 break;
  58
  59             case 'alt':
  60                 if(!is_array($_val)) {
  61                     $$_key = smarty_function_escape_special_chars($_val);
  62                 } else {
  63                     $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
  64                 }
  65                 break;
  66
  67             case 'link':
  68             case 'href':
  69                 $prefix = '<a href="' . $_val . '">';
  70                 $suffix = '</a>';
  71                 break;
  72
  73             default:
  74                 if(!is_array($_val)) {
  75                     $extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
  76                 } else {
  77                     $smarty->trigger_error("html_image: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
  78                 }
  79                 break;
  80         }
  81     }
  82
  83     if (empty($file)) {
  84         $smarty->trigger_error("html_image: missing 'file' parameter", E_USER_NOTICE);
  85         return;
  86     }
  87
  88     if (substr($file,0,1) == '/') {
  89         $_image_path = $basedir . $file;
  90     } else {
  91         $_image_path = $file;
  92     }
  93
  94     if(!isset($params['width']) || !isset($params['height'])) {
  95         if ($smarty->security &&
  96             ($_params = array('resource_type' => 'file', 'resource_name' => $_image_path)) &&
  97             (require_once(SMARTY_CORE_DIR . 'core.is_secure.php')) &&
  98             (!smarty_core_is_secure($_params, $smarty)) ) {
  99             $smarty->trigger_error("html_image: (secure) '$_image_path' not in secure directory", E_USER_NOTICE);
 100
 101         } elseif (!$_image_data = @getimagesize($_image_path)) {
 102             if(!file_exists($_image_path)) {
 103                 $smarty->trigger_error("html_image: unable to find '$_image_path'", E_USER_NOTICE);
 104                 return;
 105             } else if(!is_readable($_image_path)) {
 106                 $smarty->trigger_error("html_image: unable to read '$_image_path'", E_USER_NOTICE);
 107                 return;
 108             } else {
 109                 $smarty->trigger_error("html_image: '$_image_path' is not a valid image file", E_USER_NOTICE);
 110                 return;
 111             }
 112         }
 113
 114         if(!isset($params['width'])) {
 115             $width = $_image_data[0];
 116         }
 117         if(!isset($params['height'])) {
 118             $height = $_image_data[1];
 119         }
 120
 121     }
 122
 123     if(isset($params['dpi'])) {
 124         if(strstr($server_vars['HTTP_USER_AGENT'], 'Mac')) {
 125             $dpi_default = 72;
 126         } else {
 127             $dpi_default = 96;
 128         }
 129         $_resize = $dpi_default/$params['dpi'];
 130         $width = round($width * $_resize);
 131         $height = round($height * $_resize);
 132     }
 133
 134     return $prefix . '<img src="'.$file.'" alt="'.$alt.'" width="'.$width.'" height="'.$height.'"'.$extra.' />' . $suffix;
 135 }
 136
 137 /* vim: set expandtab: */
 138
 139 ?>