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php Smarty模板引擎 foreach循環

編輯：關於PHP編程

　　模板文件：

代碼如下

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>{$web_tile}</title>
</head>
<body>
{$article_title}
 
-- by {$author}
<hr/>
 
{$content}
 
-- publish @ {$time}

foreach test:

{foreach ( from=url key=b item=c )}
<a href="index.php?artcle_id={==b}">{==c}</a>
{/foreach}

</body>
</html>

　　解析引擎：

代碼如下 // var
 $pattern_var = "/{$left_tag}$([wd]+){$right_tag}/";
 $replace_var = '<?php echo $this->var_tpl_arr["$1"];?>';

 if (preg_match($pattern_var, $content)) {
 $content = preg_replace($pattern_var, $replace_var, $content);
 }

 // foreach
 preg_match_all("/{$left_tag}foreachs+([^{]+?){$right_tag}/is", $content, $match_foreach);
 if (isset($match_foreach[1]) && is_array($match_foreach)) {
 foreach($match_foreach[1] as $match_key => $match_value) {
 $split_foreachs = array_filter(preg_split('/s+/is', $match_value));
 $new_foreach_tag = array();
 foreach($split_foreachs as $split_foreach) {
 $split = explode("=", $split_foreach);
 if (count($split == 2)) {
 if(in_array($split[0], array("from","item","key"))) {
//過濾標簽不存在過濾
 $new_foreach_tag[$split[0]] = $split[1];
 }
 }
 }

 $from = $key = $item = '';
 extract($new_foreach_tag);
 $key = ($key) ? '$'.$key.' =>' : '' ;
 $replace_foreach = '<?php foreach($this->var_tpl_arr["'.$from.'"] as '.$key.' $'.$item.') { ?>';
 $content = str_replace($match_foreach[0][$match_key], $replace_foreach, $content);

 }
 }

 $pattern_foreach = "/{$left_tag}/foreach{$right_tag}/";
 $replace_foreach = "<?php } ?>";
 if (preg_match($pattern_foreach, $content)) {
 $content = preg_replace($pattern_foreach, $replace_foreach, $content);
 }

 // var in statement
 $pattern_var = "/{$left_tag}==([wd]+){$right_tag}/";
 $replace_var = '<?php echo $$1;?>';

 if (preg_match($pattern_var, $content)) {
 $content = preg_replace($pattern_var, $replace_var, $content);
 }

　　解析後：

代碼如下

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title><?php echo $this->var_tpl_arr["web_tile"];?></title>
</head>
<body>
<?php echo $this->var_tpl_arr["article_title"];?>
 
-- by <?php echo $this->var_tpl_arr["author"];?>
<hr/>
 
<?php echo $this->var_tpl_arr["content"];?>
 
-- publish @ <?php echo $this->var_tpl_arr["time"];?>

foreach test:

<?php foreach($this->var_tpl_arr["url"] as $b => $c) { ?>
<a href="index.php?artcle_id=<?php echo $b;?>"><?php echo $c;?></a>
<?php } ?>

</body>
</html>

　　使用：

代碼如下

<?php

require_once 'core/YATP.class.php';

$app = new YATP();
date_default_timezone_set("Asia/Shanghai");
$app->is_cache = false;

$article_title = "yet,it is a simple template engine";
$author = "[email protected]";
$web_tile = "just test ";
$content = "It is easy to write a simple template engine for yourself,what u can do is try to do it!";
$time = date("Y-m-d H:i:s",time());

$url = array(
"url1"=>http://www.111cn.net,
"url2"=>"http://www.baidu.com",
);

$app->assign("article_title",$article_title);
$app->assign("author",$author);
$app->assign("web_tile",$web_tile);
$app->assign("content",$content);
$app->assign("time",$time);
$app->assign("url",$url);
$app->display("index.html");

　　// end of script效果：