思路:
欲在速度和易用(主要指的是美工設計的方便性)之間取得一個平衡點.於是采用了由html文件生成php文件的辦法(編譯?)
也想在分離顯示邏輯和分離html代碼之間平衡一下
例如一個論壇首頁(index.php):
代碼:
<?php
require('./template.php');
//由html生成的php文件的前綴,區別使用多種風格.
$tpl_prefix = 'default';
//模板文件名
$tpl_index = 'index';
$tpl = new Template($tpl_prefix);
$cats = array(
array('forum_id'=>'1','forum_cat_id'=>'0','forum_name'=>'PHP學習'),
array('forum_id'=>'2','forum_cat_id'=>'0','forum_name'=>'MYSQL學習')
);
$forums = array(
array('forum_id'=>'3','forum_cat_id'=>'1','forum_name'=>'PHP高級教程'),
array('forum_id'=>'4','forum_cat_id'=>'1','forum_name'=>'PHP初級教程'),
array('forum_id'=>'5','forum_cat_id'=>'2','forum_name'=>'MYSQL相關資料')
);
if ($cats)
{
if ($tpl->chk_cache($tpl_index))//檢查判斷是否需要重新生產PHP模板文件.
{
$tpl->load_tpl($tpl_index);//加載html模板文件.
//替換PHP語句
$tpl->assign_block("{block_cat}","<?foreach(\$cats as \$cat) {?>");
$tpl->assign_block("{/block_cat}","<?}?>");
$tpl->assign_block("{block_forum}","<?foreach(\$forums as \$forum) {
\nif(\$forum['forum_cat_id'] == \$cat['forum_id']) {?>");
$tpl->assign_block("{/block_forum}","<?}\n}?>");
//生產PHP模板文件.
$tpl->write_cache($tpl_index);
}
}
//包含PHP模板文件.
include($tpl->parse_tpl($tpl_index));
?>
對應的html模板文件(index.html):
代碼:
{block_cat}
<table width="100%" border="0" cellspacing="1" cellpadding="1" bgcolor="#000000" align="center">
<tr align="{=TR_ALING}" bgcolor="#FFFFFF">
<td colspan="6"><span class="title"><b>{=$cat['forum_name']}</b></span></td>
</tr>
{block_forum}
<tr bgcolor="#FFFFFF">
<td valign="top">{=$forum['forum_name']}</td>
</tr>
{/block_forum}
</table>
<br>
{/block_cat}
經過處理,裡面的{block_forum}{block_cat}標簽被替換成PHP循環語句,用於顯示數組種所有元素.
生成的PHP模板文件(default_index.php):
代碼:
<?foreach($cats as $cat) {?>
<table width="100%" border="0" cellspacing="1" cellpadding="1" bgcolor="#000000" align="center">
<tr align="<?=TR_ALING?>" bgcolor="#FFFFFF">
<td colspan="6"><span class="title"><b><?=$cat['forum_name']?></b></span></td>
</tr>
<?foreach($forums as $forum) {
if($forum['forum_cat_id'] == $cat['forum_id']) {?>
<tr bgcolor="#FFFFFF">
<td valign="top"><?=$forum['forum_name']?></td>
</tr>
<?}
}?>
</table>
<br>
<?}?>
default_index.php被包含在index.php,這樣就可以正常顯示了.
這樣,HTML模板文件可以用dw來進行修改美化,美工人員應該會方便一些.
template.php
代碼:
<?php
/*********************************************************************************
* 模板類(Template)
* 最後修改時間:2004.4.07 本論壇使用
*
*
*
**********************************************************************************/
class Template {
//$this->$template,儲存模板數據.
var $template = '';
//模板路徑.
var $tpl_path = '';
//模板前綴(風格名稱).
var $tpl_prefix = '';
//cache路徑(編譯後的路徑).
var $cache_path = '';
//css文件路徑.
var $css_path = '';
//header文件路徑.
var $header_path = '';
//footer文件路徑
var $footer_path = '';
/**
* 初始化模板路徑.
*/
function Template($root = 'default')
{
//模板前綴(風格名稱).
$this->tpl_prefix = $root;
//模板文件路徑.
$this->tpl_path = './templates/' . $root . '/';
//生成的PHP文件存放路徑.
$this->cache_path = './template_data/' .$this->tpl_prefix . '_';
return true;
}
/**
* chk_cache,檢查"編譯"後的模板是否需要更新,判斷依據:最後修改時間,"編譯"文件是否存在.
*/
function chk_cache($tpl_index)
{
$tpl_file = $this->tpl_path . $tpl_index . '.html';
$cache_file = $this->cache_path . $tpl_index . '.php';
//判斷是否需要更新.
if(!file_exists($cache_file))
{
return true;
}
elseif(filemtime($tpl_file) > filemtime($cache_file))
{
return true;
}
}
/**
* 輸出模板文件.
*/
function parse_tpl($tpl_index,$message='')
{
return $this->cache_path . $tpl_index . '.php';
}
/**
* 加載模板文件.
*/
function load_tpl($tpl_index)
{
$tpl_file = $this->tpl_path . $tpl_index . '.html';
$fp = fopen($tpl_file, 'r');
$this->template = fread($fp, filesize($tpl_file));
fclose($fp);
}
/**
* 替換變量,並且"編譯"模板.
*/
function write_cache($tpl_index)
{
$cache_file = $this->cache_path . $tpl_index . '.php';
//變量顯示.
$this->template = preg_replace("/(\{=)(.+?)(\})/is", "<?=\\2?>", $this->template);
//界面語言替換.
$this->template = preg_replace("/\{lang +(.+?)\}/ies", "\$lang['main']['\\1']", $this->template);
$fp = fopen($cache_file, 'w');
flock($fp, 3);
fwrite($fp, $this->template);
fclose($fp);
}
/**
* 替換block.
*/
function assign_block($search,$replace)
{
$this->template = str_replace($search,$replace,$this->template);
}
}
?>
