PHP循环x次，使用while和if

Question

So this has been driving me nuts for several days. I've tried THIS and THAT but nothing is working. Here's the basic rundown:

I have a MySQL database with 200 or so locations. The user enters their zip code, and I want to give them 6 random locations within 100 miles of home. Everything works great, except I can't get it to limit the results to 6. It will give me ALL the results for <100. When I try the code below (adding the for ($x=0...) bit), I get the same result, only each one repeats 6 times before listing the next one. Here's the pertinent code that returns all the locations. Any help would save me from throwing my computer out the window.

$sql = "SELECT * FROM locations ORDER BY RAND()"; 
$result = mysql_query($sql, $dbase2);

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

$city = $row['city']; 
$id= $row['id'];
$miles = calculateDistance($lat, $lon, $point2_lat,$point2_lon); 

  if ($miles < "100")
      { for ($x=0; $x<6; $x++){
       echo $city . " is about " . round($miles) . " miles away.<br />";
         };
      };           
  };

Like I said, for the sake of this post, I tried to pare it down to the important bits. Let me know if something vital is missing from my example.

Answer 1

The following change should do it:

$count = 0;
while (($row = mysql_fetch_array($result)) && ($count < 6))
    {

    $city = $row['city']; 
    $id= $row['id'];
    $miles = calculateDistance($lat, $lon, $point2_lat,$point2_lon); 

    if ($miles < 100.0) {
       echo $city . " is about " . round($miles) . " miles away.<br />";
       $count = $count + 1;
      };           
  };

There are more elegant ways...