Ordering of multidimensional arrays in PHP

$aProduct = Array (    0=> array (' goods_id ' = 1, ' name ' = ' iPhone 4 ', ' Is_group ' =>4),    1=> Array (' goods_id ' + 2, ' name ' = ' iphone 4s ', ' is_group ' =>6,    2=> Array (' goods_id ' = + 3, ' name ' = ' + ' iphone 5 ') , ' Is_group ' =>1),    3=> Array (' goods_id ' = 4, ' name ' = ' iPhone 5s ', ' Is_group ' =>1)); function ArraySort ($multi _array, $sort _key, $sort =sort_asc) {    if (Is_array ($multi _array)) {        foreach ($multi _array as $ Row_array) {            if (Is_array ($row _array)) {                $key _array[] = $row _array[$sort _key];            } else{                return false;}}    } else{        return false;    }    Array_multisort ($key _array, $sort, $multi _array);    return $multi _array;} Print_r (ArraySort ($aProduct, ' Is_group ', Sort_desc)); exit;

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