Here we are solving a basic problem faced by a beginner web developer in PHP i.e. How to create a directory in PHP .

Sample code

<?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...");
}

// ...
?>

mkdir attempts to create the directory specified by pathname.

Syntax

bool mkdir ( string $pathname [, int $mode = 0777 [, bool $recursive = false [, resource $context ]]] )

Parameters

1) pathname

The directory path.

2) 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().

3) recursive

Allows the creation of nested directories specified in the pathname.

4) context

Note: Context support was added with PHP 5.0.0. For a description of contexts

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.