MySQL使用CodeIgniter查询问题

Question

So I was able to find the root cause of my earlier problem.

Turns out it was the querying that is the problem. Well, not on my side, at least not that I think so. This problem has been bugging me for many hours now. Unfortunately, it something I don't know how to fix.

Please check this code:

public function get_calendar_content($y,$m){

   $query = $this->db->query("SELECT * from events WHERE event_date LIKE '$y-$m%'");
   $content=array();
   foreach($query->result() as $q){
       $content[substr($q->event_date,8,2)]=$q->event_details;
   }
   return $content;

}

This function ignores whatever I supply for the $m, or the month. It only cares about the year. Plus, when I tried selecting all data from the events table instead of having a where clause, it still only returns the entries or data from the events table which is is dated in the month of August.

When I tried writing the where clause explicitly to event_date LIKE '2013-09%', it wouldn't return any data at all. I don't understand what's going on. For some unknown reason, the function would only return data from August. I already tried writing the query on phpMyAdmin, and it works just how it's supposed to do. It only produces irregularity in my app. What could my problem be?

Edit: I'm now using multidimensional array. It fixed the confusion about multiple events, but still does not return data from other months.

public function get_calendar_content($y,$m){
$query = $this->db->query("SELECT * from events WHERE event_date LIKE '$y-$m%'");
           $content=array();

       foreach($query->result() as $q){
           $content[substr($q->event_date,8,2)][]=$q->event_details;
       }
       return $content;
}

Answer 1

The problem is in how you're building the return array:

substr($q->event_date,8,2) will get the day for each event (1-31) and you're using it as your key, but an array can't have repeating keys, so only the last value will be kept.

The solution is to change the key values for your array so they don't repeat