MongoDB中獲得唯一的價值，但使用PHP

Question

我使用MongoDB的不是我的鑰匙和查詢只返回一個鍵值 的下面是var_dump

<pre>array (size=471) 
    0 => 
    array (size=1) 
     'sno' => string '162230' (length=6) 
    1 => 
    array (size=1) 
     'sno' => string '165333' (length=6) 
    2 => 
    array (size=1) 
     'sno' => string '181312' (length=6) 
    3 => 
    array (size=1) 
     'sno' => string '181313' (length=6) 
    4 => 
    array (size=1) 
     'sno' => string '181314' (length=6) 
    5 => 
    array (size=1) 
     'sno' => string '181315' (length=6) 
    6 => 
    array (size=1) 
     'sno' => string '181316' (length=6) 
    7 => 
    array (size=1) 
     'sno' => string '181317' (length=6) 
    8 => 
    array (size=1) 
     'sno' => string '181318' (length=6) 
    9 => 
    array (size=1) 
     'sno' => string '181319' (length=6) 
    10 => 
    array (size=1) 
     'sno' => string '181320' (length=6)</pre> 

我不想鍵的格式。我想要的只是一個沒有循環的值的數組。

Answer 1

解決了它。

array_column($arr,"sno")