After merging PHP arrays, how to retain the key-value correspondence?

In PHP, use the array_combine() function to merge two arrays and retain the key-value correspondence. The syntax is: array_combine(array $keys, array $values). The first parameter is the key value array, and the second parameter is the value array.

Merge arrays in PHP and retain key-value correspondence

Preface

In PHP, when merging arrays, we can use the array_merge() function or the operator. However, these methods cannot preserve the key-value correspondence of array elements. This article will introduce a method to merge arrays while retaining key-value correspondence.

Method

You can use the array_combine() function to merge arrays while retaining the key-value correspondence. The function takes two parameters: an array for the keys and another for the values. The syntax is as follows:

array_combine(array $keys, array $values);

Practical case

Consider the following two arrays:

$keys = ['a', 'b', 'c'];
$values = [1, 2, 3];

To merge these arrays and retain the key-value correspondence, you can use The following code:

$mergedArray = array_combine($keys, $values);
print_r($mergedArray);

Output

Array
(
    [a] => 1
    [b] => 2
    [c] => 3
)

As you can see, the merged array contains the key-value correspondence of the original array.

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