在已排序的數組中添加額外的數字

Question

哪一種方法可以將新數字插入已經上升的有序數組中？

$new_number = 6; 
$old_array = array(1,3,4,5,7,8,10); 

// $new_array must be 1,3,4,5,6,7,8,10 

Answer 1

簡單：

$old_array = array(1,3,4,5,7,8,10); 
$old_array[] = 6; 
sort($old_array); 

/* Notes: 
    sort() will actually change the array which you pass to it 
    don't do: $old_array = sort($old_array); 
*/ 

Answer 2

爲什麼不直接添加並重新排序呢？

$new_number = 6; 
$old_array = array(1,3,4,5,7,8,10); 
array_push($old_array,$new_number); 
sort($old_array);