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# opendir

(PHP 3, PHP 4, PHP 5)

opendir -- Open directory handle

## Description

resource opendir ( string path [, resource context] )

Opens up a directory handle to be used in subsequent closedir(), readdir(), and rewinddir() calls.

## Parameters

path

  The directory path that is to be opened

context

  For a description of the context parameter, refer to the streams section of the manual.

## Return Values

Returns a directory handle resource on success, or `FALSE` on failure.

If path is not a valid directory or the directory can not be opened due to permission restrictions or filesystem errors, opendir() returns `FALSE` and generates a PHP error of level E_WARNING. You can suppress the error output of opendir() by prepending '@' to the front of the function name.

## ChangeLog

Version | Description
--- | ---
5.0.0 | path supports the ftp:// URL wrapper.
4.3.0 | path can also be any URL which supports directory listing, however only the file:// URL wrapper supports this in PHP 4

## �d��

範例 1. opendir() example

`<?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); } } ?>`

The above example will output something similar to:

    filename: . : filetype: dir
    filename: .. : filetype: dir
    filename: apache : filetype: dir
    filename: cgi : filetype: dir
    filename: cli : filetype: dir

## �Ѧ�

is_dir()
readdir()
Dir

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