Ttdfjt

When we create an order with the new customer from the backend through then how to detect the programmatically user is existing or not?

I am triggering this event "sales_order_place_after" and I have tried with below code but submit order then we will get the error: the customer is exist

$customer = Mage::getModel('customer/customer');
 if ($websiteId) 
 $customer->setWebsiteId($websiteId);
 
 $customer->loadByEmail($email);
 if ($customer->getId()) 
 return true;
 
 return false;

You want the checkout_success event

 <events>
 <checkout_onepage_controller_success_action>
 <observers>
 <abandonedcart_observer>
 <type>singleton</type>
 <class>whatever/observer</class>
 <method>doStuff</method>
 </abandonedcart_observer>
 </observers>
 </checkout_onepage_controller_success_action>
 </events>

public function doStuff(Varien_Event_Observer $observer)

 $orderIds = $observer->getEvent()->getOrderIds();
 $collection = Mage::getResourceModel('sales/order_collection')
 ->addFieldToFilter('entity_id', array('in' => $orderIds));
 foreach ($collection as $order) 
 // do stuff
 

To demonstrate what you could do you can put some test logic on success phtml to understand more about what's happening and how to tell difference between customers

app/design/frontend/[package]/[theme]/template/checkout/success.phtml

$order = Mage::getModel('sales/order')->loadByIncrementId($this->getOrderId());
$quoteId = $order->getQuoteId();
$quote = Mage::getModel('sales/quote')->load($quoteId);
$method = $quote->getCheckoutMethod(true);
$customer_email = $order->getCustomerEmail();
if ($method == 'register') 
 //code to handle if customer just registered to your site
 elseif($method == 'guest') 
 //code to handle if customer is guest
 else 
 //code to handle for logged in customer
 

Your email check logic looks correct

$customer = Mage::getModel('customer/customer');
$customer->setWebsiteId(Mage::app()->getWebsite()->getId());
$customer->loadByEmail($customer_email);

if($customer && $customer->getId())

 // Customer Exist

Then if that all works focus your attention on the following events

sales_order_place_before

adminhtml_sales_order_create_process_data

sales_order_save_after

Also maybe try under <global> scope instead of <adminhtml> scope

But I'm confused. As part of the admin create process you need to select a customer record.

So they would never not exist. That's why I included all this other stuff as thought perhaps there is a misunderstanding.