Online PHP editor | refs for qZT5Z

<?php class A { public $a; public $b; public $c; public function __construct($a, $b, $c) { $this->a = $a; $this->b = $b; $this->c = $c; } } $arr = Array( new A('a1235d', 'f', 'M'), new A('a1235d', 'm', 'L'), new A('a1235d', 'm', 'S'), new A('a1234d', 'm', 'L'), new A('a1234d', 'm', 'S'), new A('a1236d', 'm', 'S'), new A('a1236d', 'm', 'M'), new A('a1234d', 'f', 'S'), new A('a1236d', 'f', 'S'), new A('a1236d', 'f', 'M'), new A('a1235d', 'f', 'S'), new A('a1234d', 'm', 'M'), new A('a1235d', 'm', 'M'), new A('a1234d', 'f', 'M'), new A('a1235d', 'f', 'L'), new A('a1236d', 'm', 'L'), new A('a1236d', 'f', 'L'), new A('a1234d', 'f', 'L') ); function sort_by_a($arr) { usort($arr, function($a, $b) { if ($a->a == $b->a) { return 0; } return ($a->a < $b->a) ? -1 : 1; }); return $arr; } function sort_by_b($arr) { usort($arr, function($a, $b) { if ($a->b == $b->b) { return 0; } return ($a->b < $b->b) ? -1 : 1; }); return $arr; } function sort_by_c($arr) { usort($arr, function($a, $b) { if ($a->c == $b->c) { return 0; } return ($a->c < $b->c) ? -1 : 1; }); return $arr; } $arr = sort_by_c($arr); $arr = sort_by_b($arr); $arr = sort_by_a($arr); var_dump($arr);