您不应该将 PHP 与 Smarty 混合使用，因此您应该在 PHP 中做您需要的事情并为 Smarty 赋值。那么你根本不需要使用 {php} 标签。 Smarty 用于显示数据，将 php 与 Smarty 混合使用 Smarty 没有多大意义。
但是如果你真的需要在 Smarty 模板中使用 php 标签，你应该改变：
$app = new \Slim\Slim(array(
'view' => new \Slim\Views\Smarty()
));
进入
$app = new \Slim\Slim(array(
'view' => new \Slim\Views\SmartyBC()
));
但我真的不建议在 Smarty 模板中使用 php
编辑 - SMARTYBC 视图不存在于超薄框架中，因此我们必须创建它
虽然我从未使用过 Slim 框架，但我决定进一步研究。由于 SmartyBC 在 Slim 视图中不存在，我们必须手动创建它。
您必须在 Slim\Views 目录中创建 SmartyBC.php 文件，其中包含以下内容：
<?php
/**
* Slim - a micro PHP 5 framework
*
* @author Josh Lockhart
* @author Andrew Smith
* @link http://www.slimframework.com
* @copyright 2013 Josh Lockhart
* @version 0.1.2
* @package SlimViews
*
* MIT LICENSE
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
namespace Slim\Views;
/**
* SmartyView
*
* The SmartyView is a custom View class that renders templates using the Smarty
* template language (http://www.smarty.net).
*
* Two fields that you, the developer, will need to change are:
* - parserDirectory
* - parserCompileDirectory
* - parserCacheDirectory
*
* @package Slim
* @author Jose da Silva <http://josedasilva.net>
*/
class SmartyBC extends \Slim\View
{
/**
* @var string The path to the Smarty code directory WITHOUT the trailing slash
*/
public $parserDirectory = null;
/**
* @var string The path to the Smarty compiled templates folder WITHOUT the trailing slash
*/
public $parserCompileDirectory = null;
/**
* @var string The path to the Smarty cache folder WITHOUT the trailing slash
*/
public $parserCacheDirectory = null;
/**
* @var SmartyExtensions The Smarty extensions directory you want to load plugins from
*/
public $parserExtensions = array();
/**
* @var parserInstance persistent instance of the Parser object.
*/
private $parserInstance = null;
/**
* Render Template
*
* This method will output the rendered template content
*
* @param string $template The path to the template, relative to the templates directory.
* @param null $data
* @return string
*/
public function render($template, $data = null)
{
$parser = $this->getInstance();
$parser->assign($this->all());
return $parser->fetch($template, $data);
}
/**
* Creates new Smarty object instance if it doesn't already exist, and returns it.
*
* @throws \RuntimeException If Smarty lib directory does not exist
* @return \Smarty Instance
*/
public function getInstance()
{
if (! ($this->parserInstance instanceof \SmartyBC)) {
if (!class_exists('\SmartyBC')) {
if (!is_dir($this->parserDirectory)) {
throw new \RuntimeException('Cannot set the SmartyBC lib directory : ' . $this->parserDirectory . '. Directory does not exist.');
}
require_once $this->parserDirectory . '/SmartyBC.class.php';
}
$this->parserInstance = new \SmartyBC();
$this->parserInstance->template_dir = $this->getTemplatesDirectory();
if ($this->parserExtensions) {
$this->parserInstance->addPluginsDir($this->parserExtensions);
}
if ($this->parserCompileDirectory) {
$this->parserInstance->compile_dir = $this->parserCompileDirectory;
}
if ($this->parserCacheDirectory) {
$this->parserInstance->cache_dir = $this->parserCacheDirectory;
}
}
return $this->parserInstance;
}
}
实际上你只需从 Smarty.php 视图中复制内容并将所有 Smarty 更改为 SmartyBC。就是这样！
index.php 应该是这样的：
<?php
require 'Slim/Slim.php';
\Slim\Slim::registerAutoloader();
$app = new \Slim\Slim(array (
'view' => new \Slim\Views\SmartyBC()
)
);
$view = $app->view();
$view->parserDirectory = dirname(__FILE__) . '/smarty';
$view->parserCompileDirectory = dirname(__FILE__) . '/compiled';
$view->parserCacheDirectory = dirname(__FILE__) . '/cache';
$view->setTemplatesDirectory(dirname(__FILE__) . '/smarty/templates');
$app->get(
'/',
function () use ($app) {
$app->render('index.tpl', array('test' => 'User'));
}
);
$app->post(
'/post',
function () {
echo 'This is a POST route';
}
);
$app->put(
'/put',
function () {
echo 'This is a PUT route';
}
);
$app->patch('/patch', function () {
echo 'This is a PATCH route';
});
$app->delete(
'/delete',
function () {
echo 'This is a DELETE route';
}
);
$app->run();
您不必像在代码中那样手动在此处包含 SmartyBC.class.php。当然，这只是示例和最少的代码（来自 Slim 框架并添加了 Smarty 视图）。
模板文件：
{$test}, hello world and {php} echo "hello world from php"; {/php}
输出是：
User, hello world and hello world from php
正是你想要实现的目标。
但是我提醒您，这不是将 PHP 与模板混合的最佳方式。即使在 Smarty 文档中，您也可以阅读：
{php} 标签已从 Smarty 中弃用，不应使用。放
PHP 脚本或插件函数中的 PHP 逻辑。