PHP循环而不是空数组

Question

I am a beginner to php/sql so bear with me if I'm missing something.

I have a database that I'm querying but not all the rows are complete. I'm trying to figure out which rows have a value in a certain column. Essentially what I have now is:

while (!empty($result['c1'])) 
{
echo $result['c2'];
}

The server doesn't seem to like this. Any thoughts?

Answer 1

Assuming you already have a while loop, this goes in it like so... Ignore the mysql part....Im just illustrating...you should use PDO anyways...but since you're still learning, Im assuming you're just using mysql_* deprecated functions, as thats where most of us start.

  while($result = mysql_fetch_array($query)){

     if(!empty($result['c1'])){
       echo $result['c2'];
      }

   }