Why I'm getting NULL on WHILE loop - php

Question

I want get data from offers table ordered DESC by payout. If offer ID exist in offers_disabled_smart_link table, move to next and display link. What I'm doing wrong? I getting NULL when echo $link.
My DeliverService class is:
class DeliveryService {
protected $user_id;
protected $country;
protected $os;
protected $ip;
protected $referrer;
protected $token;
protected $smart_link;
public function __construct($user_id,$country,$ip,$os,$referrer,$token,$smart_link)
{
$this->user_id = $user_id;
$this->user_country = $country;
$this->user_ip = $ip;
$this->user_os = $os;
$this->user_referrer = $referrer;
$this->user_token = $token;
$this->smart_link_id = $smart_link;
}
public function getStatusOfferSmartLink($offer_id,$smart_link_id,$user_id)
{
global $db;
$sql="SELECT offer_id,smart_link_id,user_id FROM offers_disabled_smart_link WHERE smart_link_id=:smart_link_id AND offer_id=:offer_id and user_id=:user_id";
$stmp = $db->prepare($sql);
$stmp->execute(array(":smart_link_id"=>$smart_link_id,":offer_id"=>$offer_id,":user_id"=>$user_id));
$results = $stmp->fetchAll(PDO::FETCH_OBJ);
if($results)
return true;
else return false;
}
public function deliver()
{
global $db;
$sql="SELECT id, link, payout FROM offers ORDER BY payout DESC";
$stmp = $db->prepare($sql);
$stmp->execute();
while ($row = $stmp->fetch(PDO::FETCH_ASSOC)) {
$id = $row['id'];
$link = $row['link'];
if($this->getStatusOfferSmartLink($id,$this->smart_link_id,$this->user_id)){
continue;
}
break;
$this->localFlag = true;
}
if ($this->localFlag) {
return $link;
}
}
Here I call function deliver() and echo $link
$ad = new DeliveryService(354,$country,$ip,$os,$referrer,$token,$smart_link);
$link = $ad->deliver();
echo $link;
If you want any informations, ask me.

Answer 1

Lets assume that your query return your expected data.
$this->localFlag = true; line will never execute as it's after break statement. (Assume that you didn't set $this->localFlag anywhere else.)
change this:
break;
$this->localFlag = true;
to:
$this->localFlag = true;
break;
and try. Hope it will work.