php拆分数组的二个函数(array_slice()、array_splice())

3. $input = array("a", "b", "c", "d", "e");

4. $output = array_slice($input, 2); // returns "c", "d", and "e"

5. $output = array_slice($input, -2, 1); // returns "d"
6. $output = array_slice($input, 0, 3); // returns "a", "b", and "c"

7. // note the differences in the array keys

8. print_r(array_slice($input, 2, -1));
9. print_r(array_slice($input, 2, -1, true));
10. ?>

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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：

3. $input = array("red", "green", "blue", "yellow");

4. array_splice($input, 2);
5. // $input is now array("red", "green")

6. $input = array("red", "green", "blue", "yellow");

7. array_splice($input, 1, -1);
8. // $input is now array("red", "yellow")

9. $input = array("red", "green", "blue", "yellow");

10. array_splice($input, 1, count($input), "orange");
11. // $input is now array("red", "orange")

12. $input = array("red", "green", "blue", "yellow");

13. array_splice($input, -1, 1, array("black", "maroon"));
14. // $input is now array("red", "green",
15. // "blue", "black", "maroon")

16. $input = array("red", "green", "blue", "yellow");

17. array_splice($input, 3, 0, "purple");
18. // $input is now array("red", "green",
19. // "blue", "purple", "yellow");
20. ?>

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