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How do I handle errors when paginating results in the WordPress REST API


To handle errors when paginating results in the WordPress REST API, follow these steps:

1. Check for HTTP Error Codes:
- Use the HTTP status code to determine if there was an error. For example, a 404 error indicates that the requested resource was not found.
- Use the `wp_remote_get` function to handle HTTP errors and retrieve the response body.

2. Handle 404 Errors:
- Check if the requested resource exists on your WordPress site.
- Verify that the endpoint URL is correct.

3. Handle 500 Errors:
- Debug the server to identify the problem.
- Ensure your WordPress installation and plugins are up-to-date.

4. Handle 403 Errors:
- Check your authentication method and ensure your user role has the necessary permissions to perform the requested action.

5. Use Error Logging:
- Use error logging to track and debug issues.
- Log errors to a file or database for later analysis.

Here is an example of how you can handle errors when paginating results in the WordPress REST API:

php
<?php

// Define the API endpoint URL
$api_url = 'https://your-wordpress-site.com/wp-json/wp/v2/posts';

// Define the pagination parameters
$page = 2;
$per_page = 5;

// Construct the API query
$query = $api_url . '?page=' . $page . '&amp;per_page=' . $per_page;

// Make the API request
$response = wp_remote_get($query);

// Check for HTTP error codes
if (is_wp_error($response)) {
    // Handle the error
    error_log('Error fetching posts: ' . $response->get_error_message());
} else {
    // Process the response data
    $posts = json_decode($response['body'], true);
    foreach ($posts as $post) {
        // Process the post
    }
}

?>

In this example, the code checks for HTTP error codes using `is_wp_error` and logs the error message if an error occurs.

Citations:
[1] https://learn.wordpress.org/tutorial/using-the-wordpress-rest-api/
[2] https://wordpress.stackexchange.com/questions/348366/pagination-in-wp-rest-api
[3] https://developer.wordpress.org/rest-api/using-the-rest-api/pagination/
[4] https://github.com/Yoast/wordpress-seo/issues/20145
[5] https://wp-umbrella.com/blog/wordpress-rest-api/