SCRIPT DOPPI DA DATABSE  - PLUGIN: Code snippet 


add_action('elementor_pro/forms/validation', function ($record, $handler) {
    
	// get phone number
	$fields = $record->get_field( [
        'id' => 'phone'
    ] );
    if ( empty( $fields ) ) {
        return;
    }
	$field = current( $fields );	
	$phoneNumber = trim($field['value']);
	
	// get offer
	$offerFields = $record->get_field( [
			'id' => 'offer'
	] );
	$offerField = current( $offerFields );
	$offer = trim($offerField['value']);
	
	// check customer
	$response = checkCustomer($offer, $phoneNumber);
	if ('89aa2bca1f427b3bba6335129f479f77' == $response) { 
		$handler->add_error('phone', 'Hai già effettuato un ordine per questo prodotto. / You have already ordered this product with us.');
	} /*else if ('4baee84af7a92177c9064ddc2fc010ce' == $response) { 
		$handler->add_error('phone', 'Only pre-payment is available.');
	}*/ else if ('a6f5350f5a2b25a96d66757f761ce65c' == $response) { 
		$handler->add_error('phone', 'Prodotto non più disponibile. / Product not available anymore.');
	}
	
 /**   // Proper regex pattern
    if (1 === preg_match('/^(350|351|00351|00350|\+39351|\+39350)/', $phoneNumber)) {
        $handler->add_error('phone', 'invalid');
    }
*/
}, 10, 2);

// Function to check customer
function checkCustomer($offer, $customerPhone) {
	
	$url = 'https://gadgetpointitalia.com/valid.php?offer=' . $offer . '&customerPhone=' . $customerPhone;
    $data = file_get_contents($url);
 
	return strval($data);

}