PHP的陣列加項目很簡單，直接給定即可，不必宣告

$arr['one'] = "apple";

$arr[2] = "pineapple";

使用array_push函數

直接使用 array_push()：

$arr =array("red","yellow","orange");
array_push($arr, "green", "blue", "black");
print_r($arr);
//Array ( [0] => red [1] => yellow [2] => orange [3] => green [4] => blue [5] => black )

另一個範例，不管中間有少了索引1的項目，還是會把項目加在後面

$arr =array(0=>"red",3=>"yellow",2=>"orange");  //Lack of index 1
array_push($arr, "green", "blue", "black");
print_r($arr);
//Array ( [0] => red [3] => yellow [2] => orange [4] => green [5] => blue [6] => black )

使用array_push 一次可加多個項目。

使用空白中刮號 []

中刮號的加項目法也很方便

$arr =array(0=>"red",5=>"orange");
$arr[]= "green";
$arr[]= "blue";
$arr[]= "black";
print_r($arr);
// Array ( [0] => red [5] => orange [6] => green [7] => blue [8] => black )

整理陣列索引

重新把索引號整理過

上面的例子如果使用 array_values 可以把陣列的索引值重新整理

$arr=array_values($arr);
print_r($arr);
// Array ( [0] => red [1] => orange [2] => green [3] => blue [4] => black )

做個簡單的筆記

原文 2010-11-02