在php中数组合并相加与array_merge数组合并是有一点区别的,下面小编来给各位同学介绍array_merge与数组相加合并的区别。
+:首先出现的会覆盖后出现的
array_merge:后出现的会覆盖前面出现的,但是如果是数字索引,则是叠加效果,代码如下:
- $array1 = Array(
- 0 => 111
- );
- $array2 = Array(
- 0 => 222,
- 1 => 3333
- );
- array_merge 后:
- Array
- (
- [0] => 111
- [1] => 222
- [2] => 3333
- )
- + 后:
- Array
- (
- [0] => 111
- [1] => 3333
- )
情况二:
- $array1 = Array(
- 0 => 111
- );
- $array2 = Array(
- 'h' => 222,
- 1 => 3333
- );
array_merge 和 + 的结果是一样:
- Array
- (
- [0] => 111
- [h] => 222
- [1] => 3333
- )
结果很明显:array_merge就是两个数组的相加,键值如果是数字的话 会重新排列 如果不的话是不会修改
而+是两个数组相加会把相同的键值的值会被前面的数组给替换,如果不一样的键值那就和array_merge一样的效果.
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波比源码 » PHP 数组合并相加与array_merge 的区别
波比源码 » PHP 数组合并相加与array_merge 的区别
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