WP Debugger

This tool helps developers see and understand errors in WordPress.

What it does

Changes big error pages to show:
- The error message, list of function calls, code parts, and source with highlights
- Data from superglobals
- A “Copy for AI” button and an “Ignore error” button (this hides the page when you reload)
Shows errors in JSON format for JSON or CLI requests
Can also log HTTP requests and fake responses if ENABLE_MOCK_HTTP_INTERCEPTOR is true
Saves logs in files inside wp-content/logs/, and rotates them

Put the plugin folder into wp-content/plugins/wp-debugger/
Turn it on in WordPress (Use ?disable_debug=1 in the URL to stop it from loading)

Cause an error to see the error page, or use init_debugger()
Use these helper functions in functions.php:
- write_log( ...$messages ) — saves messages to wp-content/logs/0-debugger.log (auto-rotates)
- format_stack_trace( $trace ) and log_stack_trace( $trace ) — clean up and save function call lists
- dump( ...$vars ) — shows data in a nice way (HTML or JSON)
- dd( ...$vars ) — dump and stop right away
- dump_filter_callbacks( $filter, $dump = true ) — look at hook functions (show or save them)
- recursively_decode_json( $data ) and debugger_format_variable( $value ) — helper functions for logging
Skip the error page with ?skip_wp_debugger=1, or press “Ignore error” to set a cookie that hides it

Uses http_api_debug to save request and response logs to wp-content/logs/{domain}-requests.log (errors go to {domain}-errors.log)
If ENABLE_MOCK_HTTP_INTERCEPTOR is true, some URLs return fake data from code instead of making a real request