Magento create category programmatically

create_magento.php

function createCategory(){
    $parentId = 1;// Any of your parent category
    $category = Mage::getModel('catalog/category');
    $category->setName('My First Category');
    $category->setUrlKey('My-First-Category');
    $category->setIsActive(1); // to make active
    $category->setDisplayMode('PRODUCTS');
    $category->setIsAnchor(1); // This is for active anchor
    $category->setStoreId(Mage::app()->getStore()->getId());
    $parentCategory = Mage::getModel('catalog/category')->load($parentId);
    $category->setPath($parentCategory->getPath());
    $category->save();
 
}