爲什麼PHP讀取目錄時輸出兩個子目錄:.
和..
。子目錄「。」和「..」| PHP
從PHP.net:
<?php
$dir = "/etc/php5/";
// Open a known directory, and proceed to read its contents
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
echo "filename: $file : filetype: " . filetype($dir . $file) . "\n";
}
closedir($dh);
}
}
?>
輸出:
filename: . : filetype: dir
filename: .. : filetype: dir
filename: apache : filetype: dir
filename: cgi : filetype: dir
filename: cli : filetype: dir
爲什麼會這樣?
這是在* nix世界的正常現象 – sbczk 2010-11-12 16:37:38
您可能想查看['DirectoryIterator'](http://us.php.net/manual/en/class.directoryiterator.php)而不是'readdir' .. 。它甚至有一個'$ file-> isDot()'方法來檢測這個東西... – ircmaxell 2010-11-12 16:50:18