usort php

sample-usort.php

function sort($a, $b) {
	// If a's contributions is equal to b's contributions,
	// return 0, indicating "as it is"
	if ( $a->contributions == $b->contributions ) {
		return 0;
	}

	// If a is less than b, put it before b. Otherwise, the opposite
	return $a->contributions < $b->contributions ? -1 : 1;
}

usort($response, 'sort');

foreach($response as $data) {
	// Echo each contribution
}