Question

I have the following array ($arrayres) (example data)

Array
(
[0] => Array
        (
            [description] => somedata
            [amount] => 52,6
            [b_id] => Array
                (
                    [0] => 138950106
                    [1] => 138950106
                )

        )

    [1] => Array
        (
            [description] => somedata 
            [amount] => 4,9
            [b_id] => Array
                (
                    [0] => 138911857
                    [1] => 138911857
                )

        )
)

Then I have a query that returns the b_id in its results as well. I need to find which of the b_id’s are included in the array and their respective position in the array. So I perform an array_rearch

while ($dbres = $res->fetchRow(MDB2_FETCHMODE_ASSOC))
{

    $key = array_search($dbres['b_id'], $arrayres);
    if ($key)
    {
        $keys[] = $key;
    }

}

But there seems to be no match. print_r($keys) is always empty, although there are results that contain the b_id’s in question.

What am I doing wrong?

Answer 1

When you do array_search($dbres['b_id'], $arrayres); you’re searching for keys onto “the first layer” of that nested array and, of course, theare are only 0 or 1 as keys

You could do something like that

for($i=0;$i<count($arrayres);$i++) {
    array_search($dbres['b_id'], $arrayres[$i]['b_id']);
    if ($key)
    {
     $keys[] = $key; /* just follow your logic */
    }
}

and that has to be inserted into the while loop