给PHPLIB模版加两个函数，解决模版文件内图片、CSS和JS包括路径问题

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。

/*

* 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.");

        return false;

      }

      $this->file[$handle] = $this->filename($filename);

    } else {

      reset($handle);

      while(list($h, $f) = each($handle)) {

        $this->file[$h] = $this->filename($f);

      }

    }

  }

  /* public: set_block(string $parent, string $handle, string $name = "")

   * extract the template $handle from $parent,

   * place variable {$name} instead.

   */

  function set_block($parent, $handle, $name = "") {

    if (!$this->loadfile($parent)) {

      $this->halt("subst: unable to load $parent.");

      return false;

    }

    if ($name == "")

      $name = $handle;

    $str = $this->get_var($parent);

    $reg = "/(.*)\ns*/sm";

    preg_match_all($reg, $str, $m);

    $str = preg_replace($reg, "{" . "$name}", $str);

    $this->set_var($handle, $m[1][0]);

    $this->set_var($parent, $str);

    $this->set_var($name);

  }
 

  /* public: set_var(array $values)

   * values: array of variable name, value pairs.

   *

   * public: set_var(string $varname, string $value)

   * varname: name of a variable that is to be defined

   * value:   value of that variable

   */

  function set_var($varname, $value = "") {

    if (!is_array($varname)) {

      if (!empty($varname))

        if ($this->debug) print "scalar: set *$varname* to *$value*
\n";

        $this->varkeys[$varname] = "/".$this->varname($varname)."/";

        $this->varvals[$varname] = $value;

    } else {

      reset($varname);

      while(list($k, $v) = each($varname)) {

        if (!empty($k))

          if ($this->debug) print "array: set *$k* to *$v*
\n";

          $this->varkeys[$k] = "/".$this->varname($k)."/";

          $this->varvals[$k] = $v;

      }

    }

  }

  /* public: subst(string $handle)

   * handle: handle of template where variables are to be substituted.

   */

  function subst($handle) {

    if (!$this->loadfile($handle)) {

      $this->halt("subst: unable to load $handle.");

      return false;

    }

    $str = $this->get_var($handle);

    $str = @preg_replace($this->varkeys, $this->varvals, $str);

    return $str;

  }

  /* public: psubst(string $handle)

   * handle: handle of template where variables are to be substituted.

   */

  function psubst($handle) {

    print $this->subst($handle);

   

    return false;

  }

  /* public: parse(string $target, string $handle, boolean append)

   * public: parse(string $target, array  $handle, boolean append)

   * target: handle of variable to generate

   * handle: handle of template to substitute

   * append: append to target handle

   */

  function parse($target, $handle, $append = false) {

    if (!is_array($handle)) {

      $str = $this->subst($handle);

      if ($append) {

        $this->set_var($target, $this->get_var($target) . $str);

      } else {

        $this->set_var($target, $str);

      }

    } else {

      reset($handle);

      while(list($i, $h) = each($handle)) {

        $str = $this->subst($h);

        $this->set_var($target, $str);

      }

    }
   

    return $str;

  }

  function pparse($target, $handle, $append = false) {

    print $this->parse($target, $handle, $append);

    return false;

  }

  /* public: get_vars()

   */

  function get_vars() {

    reset($this->varkeys);

    while(list($k, $v) = each($this->varkeys)) {

      $result[$k] = $this->varvals[$k];

    }

    return $result;

  }

  /* public: get_var(string varname)

   * varname: name of variable.

   *

   * public: get_var(array varname)

   * varname: array of variable names

   */

  function get_var($varname) {

    if (!is_array($varname)) {

      return $this->varvals[$varname];

    } else {

      reset($varname);

      while(list($k, $v) = each($varname)) {

        $result[$k] = $this->varvals[$k];

      }

      return $result;

    }

  }

  /* public: get_undefined($handle)

   * handle: handle of a template.

   */

  function get_undefined($handle) {

    if (!$this->loadfile($handle)) {

      $this->halt("get_undefined: unable to load $handle.");

      return false;

    }

    preg_match_all("/{([^}]+)}/", $this->get_var($handle), $m);

    $m = $m[1];

    if (!is_array($m))

      return false;

    reset($m);

    while(list($k, $v) = each($m)) {

      if (!isset($this->varkeys[$v]))

        $result[$v] = $v;

    }
   

    if (count($result))

      return $result;

    else

      return false;

  }

  /* public: finish(string $str)

   * str: string to finish.

   */

  function finish($str) {

    switch ($this->unknowns) {

      case "keep":

      break;

      case "remove":

        $str = preg_replace('/{[^ \t\r\n}]+}/', "", $str);

      break;

      case "comment":

        $str = preg_replace('/{([^ \t\r\n}]+)}/', "", $str);

      break;

    }

    return $str;

  }

  /* public: p(string $varname)

   * varname: name of variable to print.

   */

  function p($varname) {

    print $this->finish($this->get_var($varname));

  }

  function get($varname) {

    return $this->finish($this->get_var($varname));

  }

  /********************************/

  /* private: filename($filename)

   * filename: name to be completed.

   */

  function filename($filename) {

    if (substr($filename, 0, 1) != "/") {

      $filename = $this->root."/".$filename;

    }

    if (!file_exists($filename))

      $this->halt("filename: file $filename does not exist.");
    return $filename;

  }

  /* private: varname($varname)

   * varname: name of a replacement variable to be protected.

   */

  function varname($varname) {

    return preg_quote("{".$varname."}");

  }

  /* private: loadfile(string $handle)

   * handle:  load file defined by handle, if it is not loaded yet.

   */

  function loadfile($handle) {

    if (isset($this->varkeys[$handle]) and !empty($this->varvals[$handle]))

      return true;

    if (!isset($this->file[$handle])) {

      $this->halt("loadfile: $handle is not a valid handle.");

      return false;

    }

    $filename = $this->file[$handle];

    $str = implode("", @file($filename));

    if (empty($str)) {

      $this->halt("loadfile: While loading $handle, $filename does not exist or is empty.");

      return false;

    }

    $str = $this->parsepath($str);//替换图片路径

    $this->set_var($handle, $str);

    return true;

  }

  /*  重新分析替换模版目录下指定路径(一般为图片文件路径)

   */

  function parsepath($str = ""){

      if("/" != substr($this->path, -1)){

        $this->path .= "/";

    }

    if("./" == $this->path) return $str;

    $str = preg_replace("|".$this->path."|", $this->root."/".$this->path, $str);

    return $str;

  }

  /**********************/

  /* public: halt(string $msg)

   * msg:    error message to show.

   */

  function halt($msg) {

    $this->last_error = $msg;

    if ($this->halt_on_error != "no")

      $this->haltmsg($msg);

    if ($this->halt_on_error == "yes")

      die("Halted.");

    return false;

  }

  /* public, override: haltmsg($msg)

   * msg: error message to show.

   */

  function haltmsg($msg) {

    printf("Template Error: %s
\n", $msg);

  }

}

?>

//这个声明表明moban目录和img目录在同一级目录下

$t = new Template("moban", "../img");

//这个表明img目录在moban目录里

$t = new Template("moban", "img");

?>