How to Convert a stdClass Object to an Array in PHP?

Converting stdClass Object to Array in PHP

When retrieving data from a database, it's common to obtain a stdClass object representing a row. However, working with an object may not always be convenient. This article discusses how to convert such an object to an associative array in PHP.

Problem

Consider the following scenario: You fetch post IDs using a database query and store them in a stdClass object ($post_id). When attempting to print the object, you notice that it contains elements with the 'post_id' key. Your goal is to extract the post IDs as an array of integers rather than an array of objects.

Solution

There are two main approaches to convert a stdClass object to an array:

1. JSON Encoding and Decoding

This method involves converting the object to a JSON string and then decoding it back to an array. The code below demonstrates this:

$array = json_decode(json_encode($post_id), true);

2. Manual Traversal

Alternatively, you can manually traverse the object and create the array yourself:

$array = array();
foreach ($post_id as $value) {
    $array[] = $value->post_id;
}

Example

Let's assume your $post_id object looks like this:

Array(
    [0] => stdClass Object
        (
            [post_id] => 140
        )
    [1] => stdClass Object
        (
            [post_id] => 141
        )
    [2] => stdClass Object
        (
            [post_id] => 142
        )
)

Using the manual traversal approach, your output array would be:

Array(
    [0] => 140
    [1] => 141
    [2] => 142
)

Conclusion

Both methods provide viable options for converting a stdClass object to an array. The JSON approach is concise and efficient, while the manual approach gives you more control over the process.

The above is the detailed content of How to Convert a stdClass Object to an Array in PHP?. For more information, please follow other related articles on the PHP Chinese website!