What is WordPress Hook: extra_{$context}_headers
The extra_{$context}_headers hook in WordPress is used to add additional headers to a specific context within the WordPress process. This can be useful for adding custom headers to specific pages or sections of a website.
Understanding the Hook: extra_{$context}_headers
The extra_{$context}_headers hook is located within the WordPress process where headers are being processed and sent to the browser. It allows developers to add custom headers to a specific context, such as a page, post, or custom post type.
Hook Parameters (if applicable): extra_{$context}_headers
The extra_{$context}_headers hook does not accept any specific parameters, as it is used to add custom headers to a specific context within WordPress.
Hook Doesn’t Work: extra_{$context}_headers
If the extra_{$context}_headers hook doesn’t work as expected, it could be due to a conflict with other plugins or themes that are also adding headers. It’s important to check for any conflicting code and ensure that the hook is being added in the correct location within the WordPress process.
Best Practices & Usage Notes (if applicable): extra_{$context}_headers
When using the extra_{$context}_headers hook, it’s important to consider the impact of adding additional headers to the specific context. Overloading a page with too many headers can affect performance and user experience, so it’s best to use this hook judiciously and only when necessary.
extra_{$context}_headers Usage Example
“`php
function custom_extra_headers() {
$context = ‘custom’;
$headers = apply_filters( “extra_{$context}_headers”, array() );
foreach ( $headers as $header ) {
header( $header );
}
}
add_action( ‘send_headers’, ‘custom_extra_headers’ );
“`
In this example, the extra_{$context}_headers hook is used to add custom headers to a specific context, in this case, a custom context defined by the variable $context. The headers are added using the apply_filters function, allowing other plugins or themes to modify the headers if needed.