php拆分数组的二个函数(array_slice()、array_splice())，各举一个例子，供大家学习参考。
1.array_slice()
携带三个参数，参数一为目标数组，参数二为offset，参数三为length。作用为，从目标数组中取出从offset开始长度为length的子数组。
如果offset为正数，则开始位置从数组开头查offset处，如果offset为负数开始位置从距数组末尾查offset处。如果length为正数，则毫无疑问取出的子数组元素个数为length，如果length为负数，则子数组从offset开始到距数组开头count(目标数组)－｜length｜处结束。特殊地，如果length为空，则结束位置在数组结尾。
例子：
<?php
$input = array("a", "b", "c", "d", "e");
$output = array_slice($input, 2); // returns "c", "d", and "e"
$output = array_slice($input, -2, 1); // returns "d"
$output = array_slice($input, 0, 3); // returns "a", "b", and "c"
// note the differences in the array keys
print_r(array_slice($input, 2, -1));
print_r(array_slice($input, 2, -1, true));
?>
上例将输出：
Array
(
[0] => c
[1] => d
)
Array
(
[2] => c
[3] => d
)
2.array_splice()
携带三个参数，同上，作用是删除从offset开始长度为length的子数组。
例子：
<?php
$input = array("red", "green", "blue", "yellow");
array_splice($input, 2);
// $input is now array("red", "green")
$input = array("red", "green", "blue", "yellow");
array_splice($input, 1, -1);
// $input is now array("red", "yellow")
$input = array("red", "green", "blue", "yellow");
array_splice($input, 1, count($input), "orange");
// $input is now array("red", "orange")
$input = array("red", "green", "blue", "yellow");
array_splice($input, -1, 1, array("black", "maroon"));
// $input is now array("red", "green",
// "blue", "black", "maroon")
$input = array("red", "green", "blue", "yellow");
array_splice($input, 3, 0, "purple");
// $input is now array("red", "green",
// "blue", "purple", "yellow");
?>