range— 建立一个包含指定范围单元的数组 (數字、字母)

range()函数快速创建从1到12的数字数组

$numbers=range(0,12);
echo '<pre>';
    print_r($numbers);
echo '</pre>';
//輸出
/*
Array
(
    [0] => 0
    [1] => 1
    [2] => 2
    [3] => 3
    [4] => 4
    [5] => 5
    [6] => 6
    [7] => 7
    [8] => 8
    [9] => 9
    [10] => 10
    [11] => 11
    [12] => 12
)

*/

php函数range()还可以创建从a到z的或A到Z的字符数组，用法同上

range()函数快速创建从a到g的字母数组

$numbers=range('a','g');
echo '<pre>';
    print_r($numbers);
echo '</pre>';
//輸出
/*
Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => d
    [4] => e
    [5] => f
    [6] => g
)
*/