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资源插件被认为是为Smarty提供特定的模板源或PHP组件的一种通常的方式。 例如一些资源如:数据库、LDAP、共享内存、sockets等。

资源插件可以是在$plugins_dir 目录中的一个文件(如resource.foobarxyz.php), 或在运行时通过registerResource()来注册。 两种方式你可以通过在模板中用foobarxyz:yourtemplate.tpl方式来获取到资源。

如果资源模板是不希望经Smarty编译器来处理的, 那么该资源插件应该是继承于Smarty_Resource_Uncompiled。 该资源的处理程序必须实现renderUncompiled(Smarty_Internal_Template $_template)函数。 $_template是引用值,包含了当前模板的全部变量, 这些变量值都可以通过$_template->smarty->getTemplateVars()来进行存取。 这些资源可以简单地echo它们渲染的内容到输出流。 如果Smarty设置了输出缓存,这些输出内容将被输出缓存捕获。 参见例子:libs/sysplugins/smarty_internal_resource_php.php

如果资源插件的模板不能被缓存到磁盘, 那么该资源插件应该是继承于Smarty_Resource_Recompiled。 这些资源将在每次访问的时候都被编译,这会是不小的资源开销。 参见例子:libs/sysplugins/smarty_internal_resource_eval.php

Example 18.10. 资源插件


 * MySQL Resource
 * Resource Implementation based on the Custom API to use
 * MySQL as the storage resource for Smarty's templates and configs.
 * Table definition:
 * <pre>CREATE TABLE IF NOT EXISTS `templates` (
 *   `name` varchar(100) NOT NULL,
 *   `source` text,
 *   PRIMARY KEY (`name`)
 * ) ENGINE=InnoDB DEFAULT CHARSET=utf8;</pre>
 * Demo data:
 * <pre>INSERT INTO `templates` (`name`, `modified`, `source`) VALUES ('test.tpl', "2010-12-25 22:00:00", '{$x="hello world"}{$x}');</pre>
 * @package Resource-examples
 * @author Rodney Rehm
class Smarty_Resource_Mysql extends Smarty_Resource_Custom {
    // PDO instance
    protected $db;
    // prepared fetch() statement
    protected $fetch;
    // prepared fetchTimestamp() statement
    protected $mtime;

    public function __construct() {
        try {
            $this->db = new PDO("mysql:dbname=test;host=", "smarty", "smarty");
        } catch (PDOException $e) {
            throw new SmartyException('Mysql Resource failed: ' . $e->getMessage());
        $this->fetch = $this->db->prepare('SELECT modified, source FROM templates WHERE name = :name');
        $this->mtime = $this->db->prepare('SELECT modified FROM templates WHERE name = :name');
     * Fetch a template and its modification time from database
     * @param string $name template name
     * @param string $source template source
     * @param integer $mtime template modification timestamp (epoch)
     * @return void
    protected function fetch($name, &$source, &$mtime)
        $this->fetch->execute(array('name' => $name));
        $row = $this->fetch->fetch();
        if ($row) {
            $source = $row['source'];
            $mtime = strtotime($row['modified']);
        } else {
            $source = null;
            $mtime = null;
     * Fetch a template's modification time from database
     * @note implementing this method is optional. Only implement it if modification times can be accessed faster than loading the comple template source.
     * @param string $name template name
     * @return integer timestamp (epoch) the template was modified
    protected function fetchTimestamp($name) {
        $this->mtime->execute(array('name' => $name));
        $mtime = $this->mtime->fetchColumn();
        return strtotime($mtime);

require_once 'libs/Smarty.class.php';
$smarty = new Smarty();
$smarty->registerResource('mysql', new Smarty_Resource_Mysql());

// PHP中使用



{include file='mysql:extras/navigation.tpl'}


参见: registerResource(), unregisterResource().

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