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How to recombine data using array_combine function in interface return data processing?
During development, we often need to process data returned from the interface, which may be passed in different structures. Sometimes we need to combine an index array with an array of values into an associative array, and the array of PHP's array_combine function comes in handy. This article will introduce how to recombine data using the array_combine function in interface return data processing.
The array_combine function is a built-in function in PHP. Its function is to combine two arrays into an associative array. The element of the first array will be used as the key to the new array, and the element of the second array will be used as the value of the new array.
The function prototype is as follows:
array_combine(array $keys, array $values): array
$keys : an array as the key to the new array.
$values : an array as the value of the new array.
The number of elements of these two arrays must be the same, otherwise an error will be thrown.
Suppose we have obtained the following two sets of data from an interface:
$keys = ['id', 'name', 'email'];
$values = [1, 'John Doe', 'john.doe@m66.net'];
These data represent the user's ID, name and email address respectively. Now we can use the array_combine function to recombine them into an associative array, the code is as follows:
<?php
$keys = ['id', 'name', 'email'];
$values = [1, 'John Doe', 'john.doe@m66.net'];
$user = array_combine($keys, $values);
print_r($user);
?>
Array
(
[id] => 1
[name] => John Doe
[email] => john.doe@m66.net
)
As shown above, after using array_combine , an associative array containing user information is returned, where the key is the user's attribute name and the value is the corresponding attribute value.
In actual development, we usually extract the required information from the data returned by the interface and then recombined the data using array_combine . For example, suppose the user information obtained from a RESTful API is as follows:
$response = [
'user_id' => [1, 2, 3],
'user_name' => ['John', 'Jane', 'Doe'],
'user_email' => ['john@m66.net', 'jane@m66.net', 'doe@m66.net']
];
Through the array_combine function, we can reorganize the user's ID, name and email information into a multi-dimensional associative array for easy subsequent processing:
<?php
$response = [
'user_id' => [1, 2, 3],
'user_name' => ['John', 'Jane', 'Doe'],
'user_email' => ['john@m66.net', 'jane@m66.net', 'doe@m66.net']
];
$users = [];
foreach ($response['user_id'] as $index => $id) {
$users[] = array_combine(
['id', 'name', 'email'],
[$id, $response['user_name'][$index], $response['user_email'][$index]]
);
}
print_r($users);
?>
Array
(
[0] => Array
(
[id] => 1
[name] => John
[email] => john@m66.net
)
[1] => Array
(
[id] => 2
[name] => Jane
[email] => jane@m66.net
)
[2] => Array
(
[id] => 3
[name] => Doe
[email] => doe@m66.net
)
)
In this example, we use the array_combine function to combine each user's ID, name, and email into a new associative array, and then collect them into the $users array. Finally, we get a multidimensional array containing multiple user information for easier subsequent operations.
The array_combine function is very useful when processing data returned by an interface, especially when we need to combine a set of keys and a set of values into an associative array. By using array_combine properly, the code can be made more concise and easy to read. In actual projects, especially when dealing with complex data structures, this function can significantly improve development efficiency.
Hope this article helps you better understand how to use the array_combine function in interface return data processing. If you have more questions, feel free to ask!
