php字符分割的几个函数

第一个

$str = 'one|two|three|four';

print_r(explode('|', $str));

// 正数的 limit
print_r(explode('|', $str, 2));

// 负数的 limit
print_r(explode('|', $str, -1));

Array
(
    [0] => one
    [1] => two
    [2] => three
    [3] => four
)


Array
(
    [0] => one
    [1] => two|three|four
)
Array
(
    [0] => one
    [1] => two
    [2] => three
)

 

第二个：

$str = "Hello Friend";
$arr1 = str_split($str);
$arr2 = str_split($str, 3);

print_r($arr1);
print_r($arr2);

Array
(
    [0] => H
    [1] => e
    [2] => l
    [3] => l
    [4] => o
    [5] =>
    [6] => F
    [7] => r
    [8] => i
    [9] => e
    [10] => n
    [11] => d
)

Array
(
    [0] => Hel
    [1] => lo 
    [2] => Fri
    [3] => end
)