How to use the array_merge_recursive() function of PHP array merging?

array_merge_recursive() function recursively merges the keys and values ​​in the array to create a new array. The syntax is array_merge_recursive(...$arrays), the parameter is the array list to be merged, and the return value is the merged new array. This function recursively processes nested arrays, with unique keys and overwritten values ​​when merging.

PHP uses the array_merge_recursive() function to merge arrays

Introduction

array_merge_recursive() Function can be used to merge two or more arrays, it will recursively merge the keys and values ​​in the arrays, thereby creating a new array.

Syntax

array_merge_recursive(...$arrays);

Where ...$arrays represents the array list to be merged.

Parameters

• $arrays: Array list to be merged

Return value

This function returns a merged new array.

Practical case

The following code example demonstrates how to use array_merge_recursive() Function:

<?php

// 创建两个数组
$arr1 = array("a" => "apple", "b" => "banana");
$arr2 = array("b" => "berry", "c" => "cherry");

// 使用 array_merge_recursive() 合并数组
$mergedArray = array_merge_recursive($arr1, $arr2);

// 打印合并后的数组
print_r($mergedArray);
?>

Output:

Array
(
    [a] => apple
    [b] => berry
    [c] => cherry
)

Note:

• array_merge_recursive() Arrays nested within arrays will be processed recursively when merging arrays.
• If you want to make the keys in the merged array unique, you can use the array_merge() function.
• If you want to overwrite the values ​​in the merged array, you can use the array_replace_recursive() function.

The above is the detailed content of How to use the array_merge_recursive() function of PHP array merging?. For more information, please follow other related articles on the PHP Chinese website!