ファイル検索する際はopendirが早い - Qiita

<?php function list_dir_by_opendir($dir) { $ret[] = $dir; if ($dh = opendir($dir)) { while (($file = readdir($dh)) !== false) { $file = $dir . DIRECTORY_SEPARATOR . $file; $ret[] = $file; } closedir($dh); } return $ret; } function list_dir_by_glob($dir) { $ret[] = $dir; foreach( glob($dir.DIRECTORY_SEPARATOR.'{.*,*}',GLOB_BRACE) as $file ) { $ret[] = $file; } return $ret; } function list_dir_by_it