<?php
$servername = "localhost";
$username = "user";
$password = "user";
$dbname = "user";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
//Здесь все пашет отлично
if($_GET['method'] == 'login'){
	 //return $_GET['var1'] + $_GET['var2'];
	$sqlLogin = "select id from customer where login='".$_GET['login']."' and password='".$_GET['password']."'";
	$sqlEmail = "select id from customer where email='".$_GET['login']."' and password='".$_GET['password']."'";
	$sqlTest = "select * from customer";

	$result = $conn->query($sqlLogin);
	if ($result->num_rows > 0) {
		while($row = $result->fetch_assoc()) {
		echo $row["id"];
		}
	}else {
		$resultMail = $conn->query($sqlEmail);
		if ($resultMail->num_rows > 0) {
		while($row = $resultMail->fetch_assoc()) {
			echo $row["id"];
		}
	}
}
$conn->close();
}

// Таблицы order и customer находятся в одной БД метод login работает нормально. А вот getOrders не пашет
if($_GET['method'] == 'getOrders'){
	$sqlOrder = "select * from order where 	id_client ='".$_GET['id']."' or id_executor='".$_GET['id']."'";
	$result = $conn->query($sqlOrder);
	$rows = array();
	if ($result->num_rows > 0) {
		echo "Works";
		while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"];
		$rows[] = $row;
		}
	}
	print json_encode($rows);
	$conn->close();
}