<?php

function checkSolution($obj, $asVar = false) {
    // $asVar - true, return array
    //        - false, return json
    $res = array();
    $opts = unserialize($obj->getCorrectData());
    foreach ( $opts as $opt => $val ) {
        $right = $val[1];
        $choices = $val[0];
        if ( isset($_POST[$opt]) && isset($_POST[$opt.'_input']) ) {
            return json_encode(array());
        }
        if ( isset($_POST[$opt]) || isset($_POST[$opt.'_input']) ) {
            if ( isset($_POST[$opt]) ) {
                if ($right == $_POST[$opt] ) {
                    $res[$opt] = 1;
                } else {
                    $res[$opt] = 0;
                }
            } else if ( isset($_POST[$opt.'_input']) ) {
                if ( !strcmp($choices[$right], $_POST[$opt.'_input']) ) {
                    $res[$opt] = 1;
                } else {
                    $res[$opt] = 0;
                }
            }
        } else {
            $res[$opt] = 0;
        }
    }
    if ( $asVar ) {
        return $res;
    } else {
        return json_encode($res);
    }
}

function collectInput($obj) {
    $res = array();
    $opts = unserialize($obj->getCorrectData());
    foreach ( $opts as $opt => $val ) {
        $right = $val[1];
        $choices = $val[0];
        if ( isset($_POST[$opt]) || isset($_POST[$opt.'_input']) ) {
            if ( isset($_POST[$opt]) ) {
                if ( $_POST[$opt] == -1 ) {
                    $res[$opt] = "-1";
                } else {
                    $res[$opt] = $choices[$_POST[$opt]];
                }
            } else if ( isset($_POST[$opt.'_input']) ) {
                $res[$opt] = $_POST[$opt.'_input'];
            }
        } else {
            $res[$opt] = "";
        }
    }
    return $res;

}
?>