1. About array_search and unset
Original code:
public function appViewUnread($uid, $id)
{
$userNewRepyKey = Config_CacheKey::USER_QUESTION_NEW_REPLY.$uid;
$userNewReply = $this->appGetUserNewReply($uid);
$key = array_search($id, $userNewReply);
unset($userNewReply[$key]);
$this->redis->set($userNewRepyKey, serialize($userNewReply));
}BUG analysis: If array_search cannot find the result, it returns false, then unset ($userNewReply[false]) is equivalent to unset($ userNewRrply[0]) , the first element of the array will be deleted.
Updated code:
public function appViewUnread($uid, $id)
{
$userNewRepyKey = Config_CacheKey::USER_QUESTION_NEW_REPLY.$uid;
$userNewReply = $this->appGetUserNewReply($uid);
$key = array_search($id, $userNewReply);
if($key != false)
{
unset($userNewReply[$key]);
$this->redis->set($userNewRepyKey, serialize($userNewReply));
}
}The above introduces the bug library 2016-06-16 on January 6, 2016, including the content on January 6, 2016. I hope it will be helpful to friends who are interested in PHP tutorials.
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