PHP代码:--------------------------------------------------------------------------------

<?php
if(!defined("__TEMPLATE_H_PHP__")){
define("__TEMPLATE_H_PHP__","template.h.php");
/******************** CODE START ********************/

//PHP类库:template.h.php
//运行环境:PHP4.0
//修改时间:2002-08-01
//最后修改:stangly.wrong
//类库简介:模板的提取显示的类
/////////////////////////////////////////////////////////////

//类名:模板基类 Template_base
//功能:模板具体操作类。
class Template_base {
var $classname = "Template_base";

/* 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 = "";


/***************************************************************************/
/* public: Constructor.
* root: template directory.
* unknowns: how to handle unknown variables.
*/
function Template_base($root = ".", $unknowns = "remove") {
$this->set_root($root);
$this->set_unknowns($unknowns);
}

/* 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