php分割字符串的函数有explode()和str_split()
explode()
本函数为 implode() 的反函数，使用一个字符串分割另一个字符串，返回一个数组。
语法： (推荐学习：PHP视频教程)array explode( string separator, string string [, int limit] )
例子：<?php
$str = 'one|two|three|four';
print_r(explode('|', $str));
print_r(explode('|', $str, 2));
// 负数的 limit(自 PHP 5.1 起)
print_r(explode('|', $str, -1));
?>
输出结果如下：Array
(
[0] => one
[1] => two
[2] => three
[3] => four
)
Array
(
[0] => one
[1] => two|three|four
)
Array
(
[0] => one
[1] => two
[2] => three
)
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
)
