[UPHPU] better way to find position in an array of numeric values?

[Wade Preston Shearer]

I have an array called $things that I am iterating through. On each loop I need to echo out some values of the sub-array. I also need to echo out a "position." The position is a text string representation of a numeric value. I have an array of possible positions. The correct position is the one immediately less than the ID. So, if the ID was 32, then the position would be 'b'. Is there a more efficient way to determine and return the position than how I am doing it below?

function position($id) {
        $positions = array(10 => 'a', 22 => 'b', 46 => 'c', 88 => 'd');

        foreach($position as $key => $value) {
                if($id < $key) {
                        $position = $value;
                }
        }
        
        return $position;
}

foreach($things as $value) {

}

echo "\n" . $value['name'] . ' is in position ' . position($value['id']) . '.';

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