class test { protected $_tmp = array(); public function foo() { $id = '123'; $tmp = $this->get_tmp($id); echo ''; var_dump($tmp); echo ''; } public function bar() { $id = '223'; $tmp = $this->get_tmp($id); echo ''; var_dump($tmp); echo ''; } public function get_tmp($id) { // 已經有資料時直接回傳 if (count($this->_tmp) > 0) { if (isset($this->_tmp[$id])) { return $this->_tmp[$id]; } return FALSE; } // 取得資料 $tmp = array( '123' => array('id' => '123', 'name' => 'xdy'), '223' => array('id' => '223', 'name' => 'xdasdfsafdy'), '323' => array('id' => '323', 'name' => 'xsdfsdfdy'), '423' => array('id' => '423', 'name' => 'xsadasdasdffdy'), ); // 作快取 $this->_tmp = $tmp; // 檢查是否有需要的資料 if (isset($this->_tmp[$id])) { return $this->_tmp[$id]; } return FALSE; } } $test = new test(); $test->foo(); // 抓取的資料會做第一次的快取 $test->bar(); // 這次就會直接從快取抓資料 $tmp = $this->get_tmp('323'); // 這次也是直接抓快取資料
Friday, May 20, 2011
資料快取的概念
Monday, May 16, 2011
Sunday, May 15, 2011
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