数组被php中的最后一个元素覆盖

Question

The result stored in $g is 1 and 2. The following code I've written below, my $array['music'] stores only the last element that is 2. But what I want is to execute my sql query 2 times under foreach and match the value of $g which is 1 and 2 with mu_id ( mu_id is the column name from another table music ) and store all the rows data of row 1 and 2 in to $array['music'] .

It is storing only for the second row (2) not for 1 or it is overwriting it when it is executing for the second time inside loop. If there is any logic to make it work then please let me know.

    foreach($genre as $g)
    {
        echo $g;
        echo "<br>";
        $array['music'] = $m -> where('mu_id', $g ) -> get();
    }

Answer 1

You're redeclaring the entire array each time rather than adding to it, use this instead:

foreach($genre as $g)
{
    $array['music'][] = $m->where('mu_id', $g)->get();
}

Or even better, less queries:

$array['music'] = $m->where_in('mu_id', $genre)->get();

Answer 2

如果要将所有数据存储在数组中，则应使用$array['music'][]而不是$array['music']