wp-includes/functions.php:4084Kills WordPress execution and displays JSON response with an error message.
$messagestring$titlestringoptional''$argsstring|arrayoptionalarray()function _json_wp_die_handler( $message, $title = '', $args = array() ) { list( $message, $title, $parsed_args ) = _wp_die_process_input( $message, $title, $args ); $data = array( 'code' => $parsed_args['code'], 'message' => $message, 'data' => array( 'status' => $parsed_args['response'], ), 'additional_errors' => $parsed_args['additional_errors'], ); if ( isset( $parsed_args['error_data'] ) ) { $data['data']['error'] = $parsed_args['error_data']; } if ( ! headers_sent() ) { header( "Content-Type: application/json; charset={$parsed_args['charset']}" ); if ( null !== $parsed_args['response'] ) { status_header( $parsed_args['response'] ); } nocache_headers(); } echo wp_json_encode( $data ); if ( $parsed_args['exit'] ) { die(); }}Introduced in 5.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.