str_split()

str_split() 将字符串分割为一个数组，成功返回一个数组。

语法：

array str_split( string string [, int length] )

例子：

<?php
$str = 'one two three';
$arr1 = str_split($str);
$arr2 = str_split($str, 3);
print_r($arr1);
print_r($arr2);
?>

输出结果如下：

Array
(
    [0] => o
    [1] => n
    [2] => e
    [3] =>  
    [4] => t
    [5] => w
    [6] => o
    [7] =>  
    [8] => t
    [9] => h
    [10] => r
    [11] => e
    [12] => e
)
Array
(
    [0] => one
    [1] =>  tw
    [2] => o t
    [3] => hre
    [4] => e
)