Heads or tails (hort)

<?php
class hort extends Plugin {

    function isTriggered() {

        if(!isset($this->info['text'])) {
            $this->sendOutput($this->CONFIG['usage']);
            return;
        }

        $shuffle = array("heads","tails");
        $result = array_rand($shuffle);
        $bet = explode(" ", $this->info['text']);
        if(!$this->userInDb()) $this->insertUser();
        if (!$bet[1]){
            $this->sendOutput("Please choose amount to bet");
            return;
        } else if ($bet[1] != "heads"){
            $this->sendOutput("Please choose heads or tails");
        } else if ($bet[1] != "tails"){
            $this->sendOutput("Please choose heads or tails");
        } else {
            $this->sendOutput($this->info['nick'] . " You bet $" . (int)$bet[1] . " on " . $bet[0]);
            if (!$this->check($bet[1])) {
                $this->sendOutput("You dont have enough funds to play");
            } else {
                if($result == 0) {
                    $result = "heads";
                    if ($result == $bet[0]) {
                        $this->sendOutput("You won");
                        $this->win((int)$bet[1]);
                    } else {
                        $this->sendOutput("You lost");
                        $this->lost((int)$bet[1]);
                    }
                } else if ($result == 1) {
                    $result = "tails";
                    if ($result == $bet[0]) {
                        $this->sendOutput("You won");
                        $this->win((int)$bet[1]);
                    } else {
                        $this->sendOutput("You lost");
                        $this->lost((int)$bet[1]);
                    }
                }
            }
        }
    }

    function userInDb() {
        $res = $this->MySQL->sendQuery("SELECT 1 FROM hort WHERE nick='" . $this->info['nick'] . "'");
        if($res['count'] == 0) return false;
    return true;
    }
    function win($a) {
        $res = $this->MySQL->sendQuery("UPDATE hort SET money = money + " . $a . " WHERE nick= '" . $this->info['nick'] . "'");
    return true;
    }
    function lost($a) {
        $res = $this->MySQL->sendQuery("UPDATE hort SET money = money - " . $a . " WHERE nick= '" . $this->info['nick'] . "'");
    return true;
    }
    function check($a) {
        $res = $this->MySQL->sendQuery("SELECT * FROM `hort` where nick = '" . $this->info['nick'] . "' and money >= " . $a . "");
        if($res['count'] == 0) return false;
    return true;
    }
    function insertUser() {
        $this->MySQL->sendQuery("INSERT INTO hort (nick,money) VALUES ('" . $this->info['nick'] . "',100)");
    return true;
    }
}