Online PHP editor | output for SClMu

<?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 == $b->a) { return 0; } return strcmp($a->a, $b->a); }); return $arr; } function sort_by_b($arr) { usort($arr, function($a, $b) { if ($a->b == $b->b) { return 0; } return strcmp($a->b, $b->b); }); return $arr; } function sort_by_c($arr) { usort($arr, function($a, $b) { if ($a->c == $b->c) { return 0; } return strcmp($a->c, $b->c); }); return $arr; } function printarr($arr) { foreach ($arr as $a) echo $a->a."\t".$a->b."\t".$a->c."\n"; echo "\n"; } $sort = array(); foreach ($arr as $k => $v) { $sort['a'][$k] = $v['a']; $sort['b'][$k] = $v['b']; $sort['c'][$k] = $v['c']; } array_multisort($sort['a'], SORT_DESC, $sort['b'], SORT_DESC, $sort['c'], SORT_DESC, $arr); printarr($arr); //$arr = sort_by_c($arr); //printarr($arr); //$arr = sort_by_b($arr); //printarr($arr); //$arr = sort_by_a($arr); //printarr($arr);