trying sort 2-dimensional array of pizza toppings category of topping belongs to. way client supplies data isn't ideal this. here's sample of data:
[0] => array ( [id] => 30 [title] => pepperoni [meat] => 1 [veggie] => [sauce] => [cheese] => [condiment] => ) [1] => array ( [id] => 29 [title] => onions [meat] => [veggie] => 1 [sauce] => [cheese] => [condiment] => ) the idea toppings should grouped type (ie. meat) in specific order (ie. meats followed veggies followed sauces , on)—independent of order in they're retrieved. importantly, no topping ever belongs 2 types.
here's stab @ this:
$topping_options = array() // ie. sample data above usort($topping_options, function($opt_a, $opt_b) { $scores = array("a" => 0, "b" => 0); foreach( array("a" => $opt_a, "b" => $opt_b) $index => $opt) { if ($opt['meat']) $scores[$index] = 5; if ($opt['veggie']) $scores[$index] = 4; if ($opt['sauce']) $scores[$index] = 3; if ($opt['cheese']) $scores[$index] = 2; if ($opt['condiment']) $scores[$index] = 1; } return $scores['a'] - $scores['b']; } ); this doesn't @ achieve aims , don't understand why; seems me whenever $opt_a has higher score $opt_b should keep it's position while $opt_b gets sent down rung further comparisons. understand i'm doing wrong. thanks.
- i think code correct , problem in test data. reorder them see result
to obtain correct result order, change code
return $scores['b'] - $scores['a'];
