PHP gurus, how can I improve my search code ?

[2levelsabove]

Automotive site in which users are searching by make model and zipcode.

 

session_start(); //to store session variables 
require_once('include/_process/application.php');	


$results='';
$data=array();
$matches=array();             

if (isset($_GET['id']))
{
$searchQuery ="Select reg_users_ads.reg_users_ads_id, dealer, reg_users_ads.year, make, model, reg_users_ads.trim, reg_users_ads.price, reg_users_ads.exterior_color, reg_users_ads.transmission, reg_users_ads.mileage FROM reg_users_ads, atrMakes, atrModels WHERE dealer=".$_GET['id']." AND reg_users_ads.atrMakesID = atrMakes.atrMakesID AND atrMakes.atrMakesID = atrModels.atrMakesID AND reg_users_ads.atrModelsID=atrModels.atrModelsID";

$skipDistanceCalc=1;

}
else
{
//////////////////////////////////distance stuff//////////////////////////////////////////
//lets set variables
if (isset($_GET['page']))//we are following page links so we must use the page variables
{
$make=$_POST['makeo'];
$model=$_POST['modelo'];
$zip=$_POST['USZipcodeo'];
$radius=$_POST['radiuso'];


}
else{
$make=$_POST['make'];
$model=$_POST['model'];
$zip= $_POST['USZipcode'];
$radius = $_POST['radius'];

}


$query = "select * from atrUSZipcode where ZIPCode = '$zip' LIMIT 1";
$result = mysql_query($query);
$row = mysql_fetch_assoc($result);

if(empty($row)){$results = "<tr><td align='center' class='results' style='font-size:16px;font-weight:bold;color:red;font-family:arial;'>Invalid zip code</td></tr>";}

$lat = $row['lat'];
$lon = $row['lon'];


///////////////////////////////////////////////////////////
$coords = array('latitude' => "$row[lat]", 'longitude' => "$row[lon]");
$sql = "SELECT ZIPCode, ( 3959 * acos( cos( radians( {$coords['latitude']} ) ) * cos( radians( lat ) ) * cos( radians( lon ) - radians( {$coords['longitude']} ) ) + sin( radians( {$coords['latitude']} ) ) * sin( radians( lat ) ) ) ) AS distance FROM atrUSZipcode HAVING distance <= {$radius} ORDER BY distance";


$result = mysql_query($sql);
//we got all the zips within however miles of users zipcode
while($row = mysql_fetch_array($result)){
$validZIPS[] = $row['ZIPCode'];
$zipDistance[]= $row['distance'];
}
$comma_separated_zip = implode("','", $validZIPS);




$searchQuery ="Select reg_users_ads.reg_users_ads_id, reg_users_ads.year, make, model, reg_users_ads.trim, reg_users_ads.price, reg_users_ads.exterior_color, reg_users_ads.transmission, reg_users_ads.mileage, zipcode ";

$searchQuery .= "FROM reg_users_ads, atrMakes, atrModels";


if ($model=="0")//all selected in models
{
$searchQuery .= " WHERE reg_users_ads.atrMakesID = '".$make."' AND reg_users_ads.atrMakesID = atrMakes.atrMakesID AND reg_users_ads.atrModelsID = atrModels.atrModelsID AND reg_users_ads.zipcode IN ('".$comma_separated_zip."') AND status = 'active'";
}
else
{
$searchQuery .= " WHERE reg_users_ads.atrMakesID = '".$make."' AND reg_users_ads.atrModelsID = '".$model."' AND reg_users_ads.atrMakesID = atrMakes.atrMakesID AND reg_users_ads.atrModelsID = atrModels.atrModelsID AND reg_users_ads.zipcode IN ('".$comma_separated_zip."') AND status = 'active'";
}

//error_log($searchQuery,1,"[email protected]");

//////////////////////////////////////////////////////////
//echo $searchQuery;

$searchResult = mysql_query($searchQuery);

$num_rows=mysql_num_rows($searchResult);

if ($num_rows)
{//if results


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

$alltheresults[] = $row;
}


unset($row);



//lets add the zipcode distance from user with each row
foreach($alltheresults as $row){

if ($skipDistanceCalc==1)
{$data[] = $row;
}
else{

     $found=array_search($row[9],$validZIPS);
     

     
     
    //  error_log("found is============================== ".$found,1,"[email protected]");
       if ($found!==false)
          {
      //    error_log("found=".$found,1,"[email protected]");
          array_unshift($row,$zipDistance[$found]);
          $row[0]=round($row[0],2);
          }
$data[] = $row;
}//else

}//for loop





usort($data,compare);


/////////////////////////////Page numbering stuff/////////////////////////////////
$total_results = mysql_num_rows($searchResult);
$limit = "15"; //limit of archived results per page.
$total_pages = ceil($total_results / $limit); //total number of pages


$page=$_GET['page'];
if (empty($page))
{
$page = "1"; //default page if none is selected
}
$offset = ($page - 1) * $limit; //starting number for displaying results out of DB


///////////////////////////////////////////////////////////////////////////////

$data2=array_slice($data,$offset, $limit);



}//if results 




}

 

 

 

Also this may help you also

 

http://www.phpfreaks.com/forums/index.php/topic,224436.0.html

 

 

This code gets caled everytime when a user navigates to a diff page.

 

[JonnoTheDev]

Looks a bit of a cut and paste job!

How do you want to improve it?

[2levelsabove]

Not sure. Im sure there are things that can be done to optimize it .

[DeanWhitehouse]

One , don't ask for help on code you didn't write and don't understand, and two we are not going to make it better for you, if you want to optimise it go ahead, and if you get stuck then ask for help.

[bobbinsbro]

oh look - it's Mr. grumpypants! lol 

[DeanWhitehouse]

Mr.Grumpypants who is right though