Definition and Usage
定义和用法

The array_merge_recursive() function merges one ore more arrays into one array. The difference between this function ant the array_merge() function is when two or more array elements have the same key. Instead of override keys, the array_merge_recursivse() function makes the value as an array. (See example 1)
array_merge_recursive()函数将一个或多个数组合并为一个数组。当两个或多个元素包含相同的键时，array_merge_recursive()和array_merge()函数将存在不同。the array_merge_recursivse()函数以一个数组的形式返回值，而不忽略键。

Syntax
语法

array_merge_recursive(array1,array2,array3...)

Tips and Notes
注意点

Note: If you assign only one array to the array_merge_recursive() function, it will beahave exactly the same as the array_merge() function.
注意：如果你只在array_merge_recursive()函数中指定一个数组，它的功能和array_merge()函数完全一致。

Example
案例

<?php
$a1=array("a"=>"Horse","b"=>"Dog");
$a2=array("c"=>"Cow","b"=>"Cat");
print_r(array_merge_recursive($a1,$a2));
?>

The output of the code above will be:
上述代码将输出下面的结果：

Array (
[a] => Horse
[b] => Array ( [0] => Dog [1] => Cat )
[c] => Cow
)

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