(4:36 PM)
php function of the day
Fairly often in Drupal I get handed arrays that have significant keys, but the values are either a label or false-y. I generally don't care about the items with empty values, or I specifically want to remove them. The solution is to use array_filter($arr) to remove any array items with false-y values. In fact, sometimes I don't even care about the labels at all, in which case I might do array_keys(array_filter($arr)). Examples below.
$arr = array(
'key1' => 'Label 1',
'key2' => 'Second Label',
'key3' => 0,
'key4' => 'Label No. 4',
'key5' => 0,
);
$arr_filtered = array_filter($arr);
/*
$arr_filtered = array(
'key1' => 'Label 1',
'key2' => 'Second Label',
'key4' => 'Label No. 4',
);
*/
$arr_filtered_keys = array_keys(array_filter($arr));
/*
$arr_filtered_keys = array(
'key1',
'key2',
'key4',
);
*/
array_filter() can also take a callback as the second argument, which lets you filter out items on your own terms. See the array_filter() documentation.
