Question

How to create folders and subfolders using PHP where user can give his own NAME for the folders and subfolders and number of folders that has to be created

Answer 1

<?php
$pathToDirCreationTopDir = '/var/www/path/to';
$mainDir = $_GET['mainDir'];
$subDirs = $_GET['subDirs'];

if (!mkdir($pathToDirCreationTopDir . '/' . $mainDir)) {
    echo 'Main dir creation failed!';
    exit;
}
$pathToDirCreationTopDir = $pathToDirCreationTopDir . '/' . $mainDir;

foreach ($subDirs as $subDirName) {
    if (!mkdir($pathToDirCreationTopDir . '/' . $subDirName)) {
        echo 'Sub dir creation failed!';
        exit;
    }
}

If you work on Windows you need to replace the slashes (/) with backslashes ()