<?php

function smarty_function_html_image($params,&$smarty)
{
require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
$alt = '';
$file = '';
$height = '';
$width = '';
$extra = '';
$prefix = '';
$suffix = '';
$path_prefix = '';
$server_vars = ($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 'height':
case 'width':
case 'dpi':
case 'path_prefix':
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($params['height'])) {
if(!$_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 ($smarty->security &&
($_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);
}
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 $prefix .'<img src="'.$path_prefix.$file.'" alt="'.$alt.'" width="'.$width.'" height="'.$height.'"'.$extra.' />'.$suffix;
}
?>