<code><?php // file.php
$var = 'text';

include 'file.html';
```



```
<!-- file.html -->
=$var?>
</code>

<code><?php // file.php

$var = 'text';

#complie template
if (!is_file('template_file.php')) {
    $contents = file_get_contents('file.html');
    $contents = preg_replace(.....);
    file_put_contents('template_file.php',$contents);
}

include 'template_file.php';
</code></code>

<code><!-- file.html -->
{{var}}
</code>

<code>    protected function render($template, $data = null)
{
    $templatePathname = $this->getTemplatePathname($template);
    if (!is_file($templatePathname)) {
        throw new \RuntimeException("View cannot render `$template` because the template does not exist");
    }

    $data = array_merge($this->data->all(), (array) $data);
    extract($data);
    ob_start();
    require $templatePathname;

    return ob_get_clean();
}
</code>

<code><?php /****************
 * 核心文件
 * @discription: 编写简单的模板引擎
 */
define('INVIEW', true);
class view {
    var $tpl_dir = 'template';
    var $cache_dir = 'cache';
    var $tpl_ext = '.html';
    var $var_left = '{';
    var $var_right = '}';
    function __construct($config=array()) {
        extract($config);
        if(isset($tpl_dir))$this->tpl_dir = $tpl_dir;
        if(isset($cache_dir))$this->cache_dir = $cache_dir;
        if(isset($tpl_ext))$this->tpl_ext = $tpl_ext;
        if(isset($var_left))$this->var_left = $var_left;
        if(isset($var_right))$this->var_right = $var_right;
    }
    function load($tplfilename) {
        $tplfile = $this->tpl_dir.'/'.$tplfilename.$this->tpl_ext;
        if(!file_exists($tplfile))
            die('Template not found: '.$tplfile);
        return $this->cache($tplfilename, $tplfile);
    }
    //判断模板是否缓存，如模板文件有更改则重新编译
    function cache($tplname, $tpl_file) {
        $cache_file = $this->cache_dir.'/'.md5($tplname).'.php';
        if(!file_exists($cache_file) || filemtime($tpl_file)>filemtime($cache_file))
            $this->compile($tpl_file, $cache_file);
        return $cache_file;
    }
    //编译模板内容到PHP格式，并写入缓存
    function compile($tpl, $cache) {
        $body = file_get_contents($tpl);
        $vl = $this->var_left;
        $vr = $this->var_right;
        $patterns = array(
            "#$vl\s*include:(.+?)\s*$vr#i",
            "#$vl\s*if\s+(.+?)\s*$vr#i",
            "#$vl\s*else\s*$vr#i",
            "#$vl\s*elseif\s+(.+?)\s*$vr#i",
            "#$vl\s*endif\s*$vr#i",
            "#$vl\s*/if\s*$vr#i",
            "#$vl\s*foreach\s+(.+?):(.+?)\s*$vr#i",
            "#$vl\s*endforeach\s*$vr#i",
            "#$vl\s*/foreach\s*$vr#i",
            "#$vl([0-9a-zA-Z_]+?)\.([0-9a-zA-Z_]+?)\.([0-9a-zA-Z_]+?)$vr#i",
            "#$vl([0-9a-zA-Z_]+?)\.([0-9a-zA-Z_]+?)$vr#i",
            "#$vl([0-9a-zA-Z_\[\]\'\"]+?)$vr#i",
            "#$vl([0-9a-zA-Z_]+?):(.*?)$vr#i"
        );
        $replacements = array(
            "<?php include show('\\1'); ?>",
            "<?php if(\\1): ?>",
            "<?php else: ?>",
            "<?php elseif(\\1): ?>",
            "<?php endif; ?>",
            "<?php endif; ?>",
            "<?php if(count($\\1)>0):\$autoindex=0;foreach($\\1 as \\2):\$autoindex++; ?>",
            "<?php endforeach;endif; ?>",
            "<?php endforeach;endif; ?>",
            "<?php echo $\\1['\\2']['\\3']; ?>",
            "<?php echo $\\1['\\2']; ?>",
            "<?php echo $\\1; ?>",
            "<?php echo \\1(\\2); ?>"
        );
        $body = preg_replace($patterns, $replacements, $body);
        file_put_contents($cache, "<?php if(!defined('INVIEW'))die('YIQU'); ?>".$body);
    }
}
$view = new view();
function show($tpl) {
    global $view;
    return $view->load($tpl);
}
?>
</code>

<code><br><?php include 'view.php';
$title = '文档标题';
$a=array('a'=>'rows','b'=>array('c'=>'inarray'));
include show('index');
?>

</code>

<code><br>

<title>{title}</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">


你好，仅供参考<br>
{a.a}
{a.b.c}<br>
{foreach a:$v}
{autoindex}.{v}<br>
{/foreach}


{include:footer}

</code>

<code>
<title>=$title?></title>

<main>=$main?></main>
</code>

<code>$title = 'test'; $main = '<input>';
require('template.inc.php');
</code>

<code>ob_start();

$title = 'test'; $main = '<input>';
require('template.inc.php');

$content = ob_get_clean();
</code>