When customizing WooCommerce functionality with PHP, we often need to get all kinds of information about our customers, but sometimes, all we have is the customer's email.

For example, we have a contact form that requires the customer to provide an email, and after the user provides the email, theIf we need to check if that email address isorderedWooCommerce Existing Customers, What to Do?

If only an email address is available, the following PHP will give you a quick way to "get" the customer ID. You can then add a custom function (such as wc_get_orders()) to easily access all kinds of information about your customers.

Code to get user ID by email

function wprs_get_customer_id_from_email( $email ) {
$customer = get_user_by( 'email', $email );
if ( $customer ) return $customer->ID;
return false;
}

wprs_get_customer_id_from_email() function is used to retrieve the customer's ID from the specified email address. which is useful in a variety of situations in a WooCommerce environment.

Suppose we have stored the customer's e-mail address in a variable:

$customer_email = "customer@example.com";

We can then call this function to get the customer ID and take the next step based on the return value:

$customer_id = wprs_get_customer_id_from_email( $customer_email );
if ( $customer_id ) {
  // Successfully retrieved the user ID
} else {
  // User ID not found
}

This function uses the get_user_by( 'email', $email ) Checks if the email address provided is a pre-existing user. This function is part of WordPress, and if it finds a user using that email address, it will retrieve theWP_UserObject.