Saves a CSV file containing all customers' data

Magento-Customer-Export.php

<?php

require_once('app/Mage.php');
umask(0);
Mage::app();

$customers = Mage::getModel('customer/customer')->getCollection();
$customers->addAttributeToSelect('*');

$customersArray[0] = array(
	'entity_id',
	'email',
	'prefix',
	'firstname',
	'middlename',
	'lastname',
	'suffix',
	'website_id',
	'store_id',
	'group_id',
	'created_at',
	'updated_at',
	'is_active',
	'is_subscribed',
	'billing_firstname',
	'billing_lastname',
	'billing_company',
	'billing_street_1',
	'billing_street_2',
	'billing_city',
	'billing_region_id',
	'billing_region',
	'billing_postcode',
	'billing_country_id',
	'billing_telephone',
	'shipping_firstname',
	'shipping_lastname',
	'shipping_company',
	'shipping_street_1',
	'shipping_street_2',
	'shipping_city',
	'shipping_region_id',
	'shipping_region',
	'shipping_postcode',
	'shipping_country_id',
	'shipping_telephone'
);

$i = 1;
foreach ($customers as $key => $customer) {
	$customersArray[$i]['entity_id'] = $customer->getData('entity_id');
	$customersArray[$i]['email'] = $customer->getData('email');
	$customersArray[$i]['prefix'] = $customer->getData('prefix');
	$customersArray[$i]['firstname'] = $customer->getData('firstname');
	$customersArray[$i]['middlename'] = $customer->getData('middlename');
	$customersArray[$i]['lastname'] = $customer->getData('lastname');
	$customersArray[$i]['suffix'] = $customer->getData('suffix');
	$customersArray[$i]['website_id'] = $customer->getData('website_id');
	$customersArray[$i]['store_id'] = $customer->getData('store_id');
	$customersArray[$i]['group_id'] = $customer->getData('group_id');
	$customersArray[$i]['created_at'] = $customer->getData('created_at');
	$customersArray[$i]['updated_at'] = $customer->getData('updated_at');
	$customersArray[$i]['is_active'] = $customer->getData('is_active');

	$subscriber = Mage::getModel('newsletter/subscriber')->loadByEmail($customersArray[$i]['email']);
	$subscriberStatus = $subscriber->isSubscribed();

	$customersArray[$i]['is_subscribed'] = ($subscriberStatus? 1 : 0);

	if($customer->getDefaultBilling()) {
		$billingAddress = Mage::getModel('customer/address')->load($customer->getDefaultBilling());
		if($billingAddress->getId()) {
			$customersArray[$i]['billing_firstname'] = $billingAddress->getData('firstname');
			$customersArray[$i]['billing_lastname'] = $billingAddress->getData('lastname');
			$customersArray[$i]['billing_company'] = $billingAddress->getData('company');
			$customersArray[$i]['billing_street_1'] = $billingAddress->getStreet1();
			$customersArray[$i]['billing_street_2'] = $billingAddress->getStreet2();
			$customersArray[$i]['billing_city'] = $billingAddress->getData('city');
			$customersArray[$i]['billing_region_id'] = $billingAddress->getData('region_id');
			$customersArray[$i]['billing_region'] = $billingAddress->getData('region');
			$customersArray[$i]['billing_postcode'] = $billingAddress->getData('postcode');
			$customersArray[$i]['billing_country_id'] = $billingAddress->getData('country_id');
			$customersArray[$i]['billing_telephone'] = $billingAddress->getData('telephone');
		}
	}
	if($customer->getDefaultShipping()) {
		$shippingAddress = Mage::getModel('customer/address')->load($customer->getDefaultShipping());
		if($shippingAddress->getId()) {
			$customersArray[$i]['shipping_firstname'] = $shippingAddress->getData('firstname');
			$customersArray[$i]['shipping_lastname'] = $shippingAddress->getData('lastname');
			$customersArray[$i]['shipping_company'] = $shippingAddress->getData('company');
			$customersArray[$i]['shipping_street_1'] = $shippingAddress->getStreet1();
			$customersArray[$i]['shipping_street_2'] = $shippingAddress->getStreet2();
			$customersArray[$i]['shipping_city'] = $shippingAddress->getData('city');
			$customersArray[$i]['shipping_region_id'] = $shippingAddress->getData('region_id');
			$customersArray[$i]['shipping_region'] = $shippingAddress->getData('region');
			$customersArray[$i]['shipping_postcode'] = $shippingAddress->getData('postcode');
			$customersArray[$i]['shipping_country_id'] = $shippingAddress->getData('country_id');
			$customersArray[$i]['shipping_telephone'] = $shippingAddress->getData('telephone');
		}
	}
	$i++;
}

$file = fopen('customer_export.csv', 'w');
foreach ($customersArray as $customer) {
    fputcsv($file, $customer);
}
fclose($file);