加了两个函数，用法和原来的一样，具体看代码里面说明。
只是在声明的时候要指定图片的路径，默认为当前目录，也就是PHP文件所在目录。
注意的是图片目录要相对于模版文件目录的，模版文件和图片文件不能在同一级目录下。
<?php

/*

* Session Management for PHP3

*

* (C) Copyright 1999-2000 NetUSE GmbH

*                    Kristian Koehntopp

*

* $Id: template.inc,v 1.5 2000/07/12 18:22:35 kk Exp $

*

*/

class Template {

  var $classname = "Template";

  /* if set, echo assignments */

  var $debug     = false;

  /* $file[handle] = "filename"; */

  var $file  = array();

  /* relative filenames are relative to this pathname */

  var $root   = "";

  /* $varkeys[key] = "key"; $varvals[key] = "value"; */

  var $varkeys = array();

  var $varvals = array();

  /* "remove"  => remove undefined variables

   * "comment" => replace undefined variables with comments

   * "keep"    => keep undefined variables

   */

  var $unknowns = "remove";

  /* "yes" => halt, "report" => report error, continue, "no" => ignore error quietly */

  var $halt_on_error  = "yes";

  /* last error message is retained here */

  var $last_error     = "";

  var $path = ".";

  /*********************************/

  /* public: Constructor.

   * root:     template directory.

   * unknowns: how to handle unknown variables.

   */

  function Template($root = ".", $path = ".", $unknowns = "remove") {

    $this->set_root($root);

    $this->set_path($path);

    $this->set_unknowns($unknowns);

  }

  /* 设置图片路径

   */

  function set_path($path){

    if($path == ".") return true;

    if (!is_dir($this->root . "/" . $path)) {

      $this->halt("set_path: $path is not a directory.");

      return false;

    }

    $this->path = $path;

    return true;

  }

  /* public: setroot(pathname $root)

   * root:   new template directory.

   */ 

  function set_root($root) {

    if (!is_dir($root)) {

      $this->halt("set_root: $root is not a directory.");

      return false;

    }

    $this->root = $root;

    return true;

  }

  /* public: set_unknowns(enum $unknowns)

   * unknowns: "remove", "comment", "keep"

   *

   */

  function set_unknowns($unknowns = "keep") {

    $this->unknowns = $unknowns;

  }

  /* public: set_file(array $filelist)

   * filelist: array of handle, filename pairs.

   *

   * public: set_file(string $handle, string $filename)

   * handle: handle for a filename,

   * filename: name of template file

   */

  function set_file($handle, $filename = "") {

    if (!is_array($handle)) {

      if ($filename == "") {

        $this->halt("set_file: For handle $handle filename is empty.");

        retur