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+<?php
+
+/**
+ * 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,
+ * `modified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+ * `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=127.0.0.1", "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();
+ $this->fetch->closeCursor();
+ if ($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();
+ $this->mtime->closeCursor();
+ return strtotime($mtime);
+ }
+}