Auto fill wordpress checkout form.

Auto fill wordpress checkout form

```
add_filter( 'woocommerce_checkout_get_value' , 'custom_checkout_get_value', 20, 2 );
function custom_checkout_get_value( $value, $imput ) {
    // Billing first name
    if(isset($_GET['FirstName']) && ! empty($_GET['FirstName']) && $imput == 'billing_first_name' )
        $value = esc_attr( $_GET['FirstName'] );
    // Billing last name
    if(isset($_GET['LastName']) && ! empty($_GET['LastName']) && $imput == 'billing_last_name' )
        $value = esc_attr( $_GET['LastName'] );
    // Billing email
    if(isset($_GET['EmailAddress']) && ! empty($_GET['EmailAddress']) && $imput == 'billing_email' )
        $value = sanitize_email( $_GET['EmailAddress'] );
	// Individual 4968 
	// Familiar 4967
    return $value;
}
```