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PHP scandir () function

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Examples

Images are listed in the directory of files and directories:

<?php
$dir = "/images/";

// Sort in ascending order - this is default
$a = scandir($dir);

// Sort in descending order
$b = scandir($dir,1);

print_r($a);
print_r($b);
?>

result:

Array
(
[0] => .
[1] => ..
[2] => cat.gif
[3] => dog.gif
[4] => horse.gif
[5] => myimages
)
Array
(
[0] => myimages
[1] => horse.gif
[2] => dog.gif
[3] => cat.gif
[4] => ..
[5] => .
)

Definition and Usage

scandir () function returns an array of the specified directory files and directories.

grammar

scandir( directory,sorting_order,context );

参数 描述
directory 必需。规定要扫描的目录。
sorting_order 可选。规定排列顺序。默认是 0，表示按字母升序排列。如果设置为 SCANDIR_SORT_DESCENDING 或者 1，则表示按字母降序排列。如果设置为 SCANDIR_SORT_NONE，则返回未排列的结果。
context 可选。规定目录句柄的环境。context 是可修改目录流的行为的一套选项。

technical details

return value: Successful return an array of files and directories. It failed to return FALSE. If the directory is not a directory, then throws E_WARNING level error.
PHP version: 5.0+
PHP Update Log: PHP 5.4: new sorting_order constant.

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