PHP從舊陣列

Question

這裏新的數組是有問題的代碼：

$countries = array("New Zealand", "Australia", "United Kingdom", "New Zealand"); 

我一些代碼，可以讓我宣佈從這個前一陣新的陣列我指定後數組中多少個項。

如：

如果我做了這樣的事情：

$newArray = $countries[1], $newArray will hold "New Zealand" and "Australia" 
$newArray = $countries[2], $newArray will hold "New Zealand", "Australia" and "United Kingdom" 

目前我使用一個for循環這樣做。有沒有更容易/更有效的方法來做到這一點？

感謝

Answer 1

使用array_slice()

$array1 = array_slice($input, 0, 2); 
$array2 = array_slice($input, 0, 3); 

Answer 2

array_slice（）是你在找什麼：

$countries = array("New Zealand", "Australia", "United Kingdom", "New Zealand"); 
$length = 3; 
$newArray = array_slice($countries, 0, $length); 
// $newArray == array("New Zealand", "Australia", "United Kingdom") 

http://php.net/array_slice

Answer 3

可以使用array_slice提取它