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# scandir

(PHP 5)

scandir -- List files and directories inside the specified path

## Description

array scandir ( string directory [, int sorting_order [, resource context]])

Returns an array of files and directories from the directory. If directory is not a directory, then boolean `FALSE` is returned, and an error of level `E_WARNING` is generated.

By default, the sorted order is alphabetical in ascending order. If the optional sorting_order is used (set to 1), then sort order is alphabetical in descending order.

示範 1.A simple scandir() example
`<?php $dir = '/tmp'; $files1 = scandir($dir); $files2 = scandir($dir, 1); print_r($files1); print_r($files2); ?>`
Outputs something like:
    Array
    (
        [0] => .
        [1] => ..
        [2] => bar.php
        [3] => foo.txt
        [4] => somedir
    )
    Array
    (
        [0] => somedir
        [1] => foo.txt
        [2] => bar.php
        [3] => ..
        [4] => .
    )

示範 2.PHP 4 alternatives to scandir()
`<?php $dir = "/tmp"; $dh = opendir($dir); while (false !== ($filename = readdir($dh))) { $files[] = $filename; } sort($files); print_r($files); rsort($files); print_r($files); ?>`
Outputs something like:
    Array
    (
        [0] => .
        [1] => ..
        [2] => bar.php
        [3] => foo.txt
        [4] => somedir
    )
    Array
    (
        [0] => somedir
        [1] => foo.txt
        [2] => bar.php
        [3] => ..
        [4] => .
    )

> 心得:如果 fopen wrappers 已啟動，則可藉此函數把檔名當成URL使用。參考 fopen() 有更多關於如何指定檔名的細節和附錄 L支援URL協定的列表。

See also opendir(), readdir(), glob(), is_dir(), and sort().

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