PHP

php mkdir recursive

<?php
// Create a directory recursively (make sure to sanitize if taken from input as always!)
mkdir("/path/to/my/dir", 0777, true);

mkdir recursive php

<?php
// Desired directory 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 directories...');
}