Question

I have a nested array with valid numbers => data:-

$validData = array(array(1 => 'one data'),array(5 => '5 data'),array(15 => '15 data'),array(30 => 'thirty data'));

Let say I have a query value, $query = 14;

I want to first check if there’s a 14, if not then go to the nearest option ABOVE.

I’ve been doing nearest item with max, array_keys and ranges. But, matching or going above for some reason I can’t see the best way?

Answer 1

// in case your array keys are already sorted
$prevKey = key(current($validData));
foreach($validData as $data) {
    $currentKey = key($data);
    if ($currentKey == $query) {
        // found !
        echo $currentKey;
        break;
    }
    else if ($currentKey > $query) {
        echo $currentKey;    
        break;
    }
    $prevKey = $currentKey;
}