下载smarty模板核心类库，把libs文件夹复制到项目文件夹下，修改为smarty
在php文件中调用
require '../smarty/Smarty.class.php';
$tpl = new Smarty();
$tpl->left_delimiter="{{";
$tpl->right_delimiter="}}";
$tpl->setTemplateDir('../templates');
$tpl->setCompileDir('./templates_c');
//$tpl->setConfigDir('./templates_c');
$tpl->setCacheDir('../secretCache');
$mytitle = 'smart官方模板';
#需要注意的是模板文件中，变量标签名通常是{{$mytitle}}但在smarty默认的assign方法中要去掉$,例如 {{$mytitle}},assign语句为$tpl->assign('mytitle','我的标题')
$tpl->assign('mytitle',$mytitle);
$tpl->assign('mywords','搏击选手居马别克和朋友们');
$tpl->assign('mypic','../static/pic/5vkj20dc0hsmyy.jpg');
$tpl->display('../templates/selfdefine.html')
模板文件
<!DOCTYPE html>
<html lang="en">
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="../../../../favicon.ico">
<title>{{$mytitle}}</title> #第一个模板变量
<!-- Bootstrap core CSS -->
<link href="../static/booststrap4/css/bootstrap.min.css" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="../static/mycss/navbar-top.css" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4">
<a class="navbar-brand" href="#">Top navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false"
aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarCollapse">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
<form class="form-inline mt-2 mt-md-0">
<input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
<main role="main" class="container">
<div class="jumbotron">
<h1>Navbar example</h1>
<p class="lead">{{$mywords}}</p> #第二个模板变量
<a class="btn btn-lg btn-primary" href="../../components/navbar/" role="button">View navbar docs »</a>
<p>
<br>
<img src="{{$mypic}}" height="200"> #第三个模板变量
</p>
</div>
</main>
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="../static/booststrap4/js/jquery-3.3.1.min.js"></script>
</body>
</html>
