function displayResponse($html)
{
    if ($html) {
        if (getType(getCurrentBalance($html)) === "string") {
            if (getCurrentBalance($html) !== 0) {
                if (getLastOperation($html)) {
                    $json = array("currentBalance" => getCurrentBalance($html), "operations" => getLastOperation($html), "errorCode" => "0", "errorMessage" => "");
                } else {
                    $json = array("currentBalance" => getCurrentBalance($html), "errorCode" => "0", "errorMessage" => "");
                }
            } else {
                $json = displayError(2);
            }
        } else {
            $json = displayError(2);
        }
    } else {
        $json = displayError(1);
    }
    return $json;
}
<?php

include 'testutils.php';
include '../htmlhelper.php';
$html_okwithoutops = file_get_contents('resources/response_okwithoutops.html');
$html_ok = file_get_contents('resources/response_ok.html');
$html_fail = file_get_contents('resources/response_fail.html');
echo "</br>getCurrentBalance</br>";
echo assertEquals(getCurrentBalance($html_okwithoutops), "0") . "</br>";
echo assertEquals(getCurrentBalance($html_ok), "34,56") . "</br>";
echo assertEquals(getCurrentBalance($html_fail), "") . "</br>";
echo "</br>getLastOperation</br>";
echo assertEquals(getLastOperation($html_okwithoutops), "") . "</br>";
echo "</br>Remove Last Operation</br>";
echo assertEquals(removeLastWord("hola"), "hola") . "</br>";
echo assertEquals(removeLastWord(" hola "), "hola") . "</br>";
echo assertEquals(removeLastWord("  hola "), "hola") . "</br>";
echo assertEquals(removeLastWord("   hola M"), "hola") . "</br>";