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Before diving in, here’s a quick rundown of the parameters you’ll be working with:
- $query_data: Custom query data in an array.
- $query: The SQL query as a string.
- $query_time: Time spent on the query in seconds (float).
- $query_callstack: Comma-separated list of calling functions (string).
- $query_start: Start time of the query as a Unix timestamp (float).
Example 1: Basic Hook Registration
Here’s how you can register the log_query_custom_data filter with a simple callback function.
function weplugins_modify_log_query_custom_data_defaults($query_data, $query, $query_time, $query_callstack, $query_start) { // Customize $query_data according to your needs. return $query_data; } // Add the filter add_filter("log_query_custom_data", "weplugins_modify_log_query_custom_data_defaults", 10, 5);
Example 2: Removing the Hook
If you need to remove the filter for some reason, here’s how you can do it.
remove_filter("log_query_custom_data", "weplugins_modify_log_query_custom_data_defaults", 10, 5);
Ensure you use the same callback function name, priority, and number of arguments to successfully remove it.
Example 3: Conditional Data Modification
Adjust the $query_data conditionally based on your site’s needs.
function weplugins_conditional_modify_query_data($query_data, $query, $query_time, $query_callstack, $query_start) { if ($query_time > 1) { // Example condition $query_data['slow_query'] = true; } return $query_data; } add_filter("log_query_custom_data", "weplugins_conditional_modify_query_data", 10, 5);
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