mkdir in PHP

mkdir — Makes directory
Syntax:

bool mkdir ( string $pathname [, int $mode = 0777 [, bool $recursive = false [, resource $context ]]] )
Attempts to create the directory specified by pathname.

Parameters:

pathname
The directory path.

mode
The mode is 0777 by default, which means the widest possible access. For more information on modes, read the details on the chmod() page.

Note:
mode is ignored on Windows.
Note that you probably want to specify the mode as an octal number, which means it should have a leading zero. The mode is also modified by the current umask, which you can change using umask().

recursive
Allows the creation of nested directories specified in the pathname.

context
Note: Context support was added with PHP 5.0.0. For a description of contexts, refer to Streams.
Return values: Returns TRUE on success or FALSE on failure.



Example #1 mkdir() example

<?php
mkdir("/path/to/my/dir", 0700);
?>
Example #2 mkdir() using the recursive parameter

<?php
// Desired folder structure
$structure = './depth1/depth2/depth3/';

// To create the nested structure, the $recursive parameter 
// to mkdir() must be specified.

if (!mkdir($structure, 0777, true)) {
    die('Failed to create folders...');
}

// ...
?>
Errors/Exceptions ¶

Emits an E_WARNING level error if the directory already exists.

Emits an E_WARNING level error if the relevant permissions prevent creating the directory.



Note: When safe mode is enabled, PHP checks whether the directory in which the script is operating has the same UID (owner) as the script that is being executed.