php - Sort an array according to a set of values from another array -

i aware there another question on supposed answer same thing. problem don't see array merge has do anything. don't want merge arrays , don't understand how ordering them ... don't understand ordering coming it.

if relevant please explain in bit more detail whether other answer work me or not , how

here have ( array quite large simplification )

essentially have this

  array (     [0] => stdclass object (         [term_id] => 72         [name] => name         [slug] => slug         [term_group] => 0         [term_order] => 1         [term_taxonomy_id] => 73         [taxonomy] => gallery_category         [description] => description         [parent] => 78         [count] => 85 )     [1] => stdclass object (         [term_id] => 77         [name] => name         [slug] => slug          etc, etc, etc, there lot of objects in array 

then have ordering array like

 array (         [0] => 77,          [1] => 72,         etc 

so want impose ordering of second array on first 1 - ordering array holds value of [term_id] second array in corrrect order. in example above mean reverse order of first 2 objects.

$order_array = [77, 72];  $order_array = array_flip($order_array);  usort($objects, function($a, $b) use ($order_array) {   return $order_array[$a->term_id] - $order_array[$b->term_id]; }); 

this assumes $order_array has entry every term_id.