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                # ThinkPHP5.1 清除緩存 >在基類控制器里,寫上`clear()`方法,到時候用于調用 ``` public function clear(){ if (delete_dir_file(CACHE_PATH) || delete_dir_file(TEMP_PATH)) { return json(["code"=>1,"msg"=>"清除緩存成功"]); } else { return json(["code"=>0,"msg"=>"清除緩存失敗"]); } } ``` --- >這個時候發現`delete_dir_file()`函數未定義,我們去公共函數里進行定義并寫出來: *common.php*: ``` /** * 循環刪除目錄和文件 * @param string $dir_name * @return bool */ function delete_dir_file($dir_name) { $result = false; if(is_dir($dir_name)){ if ($handle = opendir($dir_name)) { while (false !== ($item = readdir($handle))) { if ($item != '.' && $item != '..') { if (is_dir($dir_name . DS . $item)) { delete_dir_file($dir_name . DS . $item); } else { unlink($dir_name . DS . $item); } } } closedir($handle); if (rmdir($dir_name)) { $result = true; } } } return $result; } ```
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