What is WordPress Hook: rest_query_var-{$key}
The rest_query_var-{$key} hook in WordPress is used to modify the query variable for a REST API request. This hook allows developers to alter the query variable before it is used to query the database.
Understanding the Hook: rest_query_var-{$key}
The rest_query_var-{$key} hook is located within the REST API request process in WordPress. It is called when a REST API request is made, allowing developers to modify the query variable before the request is processed.
Hook Parameters (if applicable): rest_query_var-{$key}
The rest_query_var-{$key} hook accepts the $key parameter, which represents the specific query variable being modified. Developers can use this parameter to target and modify specific query variables within the REST API request.
Hook Doesn’t Work: rest_query_var-{$key}
If the rest_query_var-{$key} hook doesn’t work as expected, it may be due to incorrect usage or conflicts with other hooks or functions. To troubleshoot, developers should ensure that the hook is being used correctly and that there are no conflicts with other code or plugins.
Best Practices & Usage Notes (if applicable): rest_query_var-{$key}
When using the rest_query_var-{$key} hook, it’s important to consider the impact of modifying query variables on the REST API request. Developers should carefully test and validate any changes made using this hook to ensure they do not negatively affect the functionality of the API.
Usage Example: rest_query_var-{$key}
“`php
function modify_rest_query_var( $value, $key ) {
// Modify the query variable based on the $key
if ( $key === ‘example’ ) {
$value = ‘modified_value’;
}
return $value;
}
add_filter( ‘rest_query_var-{$key}’, ‘modify_rest_query_var’, 10, 2 );
“`
