Working with arrays in Kohana, Blank page? - php

Question

tl;dr - Pushing an array (by $array[] or $array[$id] is not working in Kohana 3, it gives a blank white page.
I'm using Kohana (3), it's my first experience with MVC and it's been great so far; however, I'm working with a database and encountered a weird problem that I was hoping someone could shed some light on:
My workflow is like this, to give you an idea of my problems surrounding:
$sql = "SELECT table1.row1, max(table2.row1) as `maxAwesome` FROM table1, table2 WHERE table1.id=table2.table1id GROUP BY table1.id";
$table1Results = DB::query(Database::SELECT, $sql)->execute();
$masterArray = array();
foreach ($table1Results as $result1)
{
$sql = "SELECT * FROM table2 WHERE table2id='" . $result1['id'] . "' AND column > 21";
$table2Results = DB::query(Database::SELECT, $sql)->execute();
$subArray = array();
foreach ($table2Results as $result2)
{
$subArray[$result1['id']] = $result2;
// Even had just $subArray[] = array("whatever");
}
$masterArray[] = array("table1Data" => array(), "table2Data"=> $subArray);
}
I do a query where I run a couple max/min functions then do a query within the foreach doing another select to build a master array of data formatted the way I want it and all the SQL etc works fine and dandy; however, the problem arises when I'm pushing the array.
It seems whenever I push the array by doing either $array[] = array("data"); or by specifying the key $array[$id] = array("data"); Kohana gives me a straight blank page, no error, no output etc.
Sometimes I get a Kohana error indicating the key does not exist (duh, I'm creating it) but for the most part the output is straight white.
Why is this happening? Am I going about it wrong?
Thanks in advance.
Clarity edit:
My SQL blunders aside, the issue lies in the building of the secondary array, for example:
$queryStores = "SELECT stores.store_id, stores.title, max(product.discount) as `max_discount`, min(product.discount) as `min_discount`
FROM stores, products
WHERE products.store=stores.store_id
GROUP BY products.store";
$stores = DB::Query(Database::SELECT, $queryStores)->execute();
$formattedStores = array();
if (count($stores))
{
foreach ($stores as $store)
{
$formattedStores[$store['store_id']] = array(
"title" => $store['title'],
);
// Same result if just doing $formattedStores[] = array();
// Problem goes away should I do:
// $formattedStores = array("This works");
//
}
}
echo "<pre>";
print_r($formattedStores);
echo "</pre>";
That does not print an array, it simply gives a blank page; however, if i change it to just re-set the $formattedStores array to something I get an output. What is it about pushing the array that's causing a problem, perhaps a Kohana bug?
Thanks

Answer 1

Your code should be like:-
$sql = "SELECT table1.id, table1.row1, max(table2.row1) as `maxAwesome`
FROM table1, table2
WHERE table1.id = table2.table1id
GROUP BY table1.id";
$table1Results = DB::query(Database::SELECT, $sql)->execute();
$masterArray = array();
if (count($table1Results))
{
foreach ($table1Results as $result1)
{
$sqlInner = "SELECT * FROM table2
WHERE table2id = '" . $result1['id'] . "'
AND column > 21";
$table2Results = DB::query(Database::SELECT, $sqlInner)->execute();
$subArray = array();
if (count($table2Results))
{
foreach ($table2Results as $result2)
{
$subArray[$result1['id']] = $result2;
// Even had just $subArray[] = array("whatever");
}
}
$masterArray[] = array("table1Data" => array(), "table2Data"=> $subArray);
}
}
Some valuable coding standards & miss-ups:-
You have got the "id" field (w.r.t. the "table1" DB table) missing from the first SQL.
The second SQL should be better written using another variable naming, so as to keep it separate from the first one. Hence the second variable is named as "$sqlInner".
It's always better to check for any existence of array elements in an array variable, so I have used the simple checks using the "if" statement.
Hope it helps.

Answer 2

I've determined this to be memory related.