I want to query connected records (left join) and put them into array-structure in PhP, how to?

Question

almost similar like this: PHP/mySQL - how to fetch nested rows into multidimensinal array

SELECT products.NAME, products_prices.PRICE FROM products LEFT JOIN products_prices ON products.ID = products_prices.PROD_ID

this normally would result:

NAME,   PRICE
window, 1000
window, 1200
mouse,  1400

because there are two prices for window and there might be no prices at all. I want it to be resulted in an array:

$arr = array(
             array('NAME' => 'window', 'price' => array(
                                                        array('PRICE' => 1000),
                                                        array('PRICE' => 1200)
                                                       ),
             array('NAME' => 'mouse', 'price' => array(
                                                       array('PRICE' => 1400)
                                                      )
            );

so, the joined record(s) would be sub-arrays. Another problem there can be multiple joins, but only LEFT JOIN-s. How to do this nicely? The linked example put the joined columns to the main part, which I dont want to.

Answer 1

It would look like this:

 $dataStore = array();
 foreach ($recordSet as $record){
     $dataStore[$record['NAME']]['prices'][] = $record['PRICE'];
 }

This only works if you know for sure that a single product NAME can have multiple PRICES.

Answer 2

//array you get from mysql:
$arrMysql = array(
             array('NAME' => 'window', 'PRICE' => 1000),
             array('NAME' => 'window', 'PRICE' => 1200),
             array('NAME' => 'mouse', 'PRICE' => 1400)
            );

$arr = array();
foreach ($arrMysql as $row) {
    if (isset($arr[$row['NAME']])) {
        if (isset($arr[$row['NAME']]['price'])) {
            $arr[$row['NAME']]['price'].push(array('PRICE' => $row['PRICE']));
        } else {
            $arr[$row['NAME']]['price'] = array(array('PRICE' => $arr[$row['NAME']]['PRICE']), array('PRICE' => $row['PRICE']));
            unset($arr[$row['NAME']]['PRICE']);
        }
    }
    else {
        $arr[$row['NAME']] = $row;
    }
}

//you get:

$arr = array(
             'window' => array('NAME' => 'window', 'price' => array(
                                                        array('PRICE' => 1000),
                                                        array('PRICE' => 1200)
                                                       ),
             'mouse' => array('NAME' => 'mouse', 'price' => array(
                                                       array('PRICE' => 1400)
                                                      )
            );

// and if you want your array:
$arr = array_values($arr);