Question

I’m new to using PDO and have got a little bit stuck- is there a way I can add a row to the fetchAll array returned?

I want to use a value in the row and create a new value from it. I hope my example is clear enough-

 class.php
--------------------
class connect
{
//all PDO database connection functions here
}

class Display
{
   function cars($colour)
   {
   $crud = new crud();
   $crud->conn();
   $sql = "SELECT * FROM cars WHERE colour=:colour";
   $stmt = $crud->db->prepare($sql);
   $stmt->bindParam(':colour', $colour);
   $stmt->execute();
   $rows =  $stmt->fetchAll(PDO::FETCH_ASSOC);

 ****WHAT I WANT TO DO (see edit)*****
   foreach ($rows as $row) 
       {
          ADD A ROW CALLED 'newprice' that equals ($row['oldprice'] + 300 / 2)
       }


       $this->results = $rows;
    }
 }


 index.php
--------------------
//other html code...

$D = new Display;
$D->cars('1');
foreach($D->results as $row)
{
?>          

<div class="car">
    <h1>Car Name:</h2>
    <?=($row['model']);?>
    Old Price:
    <?=$row['price'];?>
    New Price:
    <?=($row['newprice']);?>    <- outputting the new row I created
 </div>
}?> 

Can this be done or is there a different more efficient way of doing this?

Sorry, I guess I wasn’t very clear with my example! I want to do a lot more than just mathematically alter the value for the new column- I want to preg_split/run it through another class etc!

Best solution I’ve got so far is to create a new multidimensional array from the PDO provided array and then add/edit that array, like this:

     $new=array();
     $key_loop = 0;
     $row_loop = 0;

      foreach ( $rows as $val )
      {
       $keys = array_keys($val);
       foreach ($keys as $key)
         {                
         $new[$row_loop][$keys[$key_loop]] = $val[$keys[$key_loop]];      
         $new[$row_loop]['new_entry'] = 'this works';
         $key_loop++;
         }       
         $row_loop++; 
      $key_loop = 0;
      }

Answer 1

What I’ve ended up doing is cycling through the rows and sticking them in a new multidimensional array with the extra values I need- might not be the most elegant way but it works for me:

$new  = array();
$array_loop = 0;

$sql = "select old_price, item_id from car";

...

$stmt->execute();
$rows =  $stmt->fetchAll(PDO::FETCH_ASSOC);

foreach ($rows as $val)
{
    $new[$array_loop]['item_id']   = $val['item_id'];
    $new[$array_loop]['old_price'] = $val['old_price'];

    $newprice = $val['old_price'] + 300 / 2;
    $new[$array_loop]['new_price'] = $new_price;
    $array_loop++;
}