这篇文章主要介绍了PHP合并数组+号和array_merge的区别,PHP的数组融合一般有两种做法,一种是直接使用加号相加,另一种则是使用array_merge函数进行相加,两者之间有点区别,需要的朋友可以参考下。

PHP的数组融合一般有两种做法，一种是直接使用加号相加，另一种则是使用array_merge函数进行相加，两者之间有点区别：

1.相加会证数组中的自然index不被重置

2.相加方法中，被加的数组内的值不会被覆盖

3.merge函数中的自然index会被重置

4.merge函数，无所谓被merge和merge关系，越后面的array参数，其值，会覆盖较前面的array参数相同键的值

例子：

数组1：

1. $arr1 = array(
2. 10 => 'valueof10',
3. 11 => 'valueof11',
4. 'key1' => 'dataofkey1',
5. 'key2' => 'dataofkey2',
6. 'array' => array(
7. 'key1' => 1,
8. 'key2' => 'abc',
9. 'key3' => array(
10. 1, 2, 'name' => 'peter'
11. ),
12. ),
13. );

数组2：

1. $arr2 = array(
2. 10 => 'newvalueof10',
3. 11 => 'newvalueof11',
4. 'key1' => 'newdataofkey1',
5. 'key3' => 'newdataofkey3',
6. 'array' => array(
7. 'key1' => 2,
8. 'key2' => 'defg',
9. 'key3' => array(
10. 1, 2, 'name' => 'jonathan', 'gender' => 'male'
11. ),
12. ),
13. );

结果比较：

1. array (size=6)
2. 10 => string 'valueof10' (length=9)
3. 11 => string 'valueof11' (length=9)
4. 'key1' => string 'dataofkey1' (length=10)
5. 'key2' => string 'dataofkey2' (length=10)
6. 'array' =>
7. array (size=3)
8. 'key1' => int 1
9. 'key2' => string 'abc' (length=3)
10. 'key3' =>
11. array (size=3)
12. 0 => int 1
13. 1 => int 2
14. 'name' => string 'peter' (length=5)
15. 'key3' => string 'newdataofkey3' (length=13)
16. array (size=8)
17. 0 => string 'valueof10' (length=9)
18. 1 => string 'valueof11' (length=9)
19. 'key1' => string 'newdataofkey1' (length=13)
20. 'key2' => string 'dataofkey2' (length=10)
21. 'array' =>
22. array (size=3)
23. 'key1' => int 2
24. 'key2' => string 'defg' (length=4)
25. 'key3' =>
26. array (size=4)
27. 0 => int 1
28. 1 => int 2
29. 'name' => string 'jonathan' (length=8)
30. 'gender' => string 'male' (length=4)
31. 2 => string 'newvalueof10' (length=12)
32. 3 => string 'newvalueof11' (length=12)
33. 'key3' => string 'newdataofkey3' (length=13)