/* Produces a dump on the state of WordPress when a not found error occurs */
/* useful when debugging permalink issues, rewrite rule trouble, place inside functions.php */

ini_set( 'error_reporting', -1 );
ini_set( 'display_errors', 'On' );

echo '<pre>';

add_action( 'parse_request', 'debug_404_rewrite_dump' );
function debug_404_rewrite_dump( &$wp ) {
    global $wp_rewrite;

    echo '<h2>rewrite rules</h2>';
    echo var_export( $wp_rewrite->wp_rewrite_rules(), true );

    echo '<h2>matched rule and query</h2>';
    echo var_export( $wp->matched_rule, true );

    echo '<h2>matched query</h2>';
    echo var_export( $wp->matched_query, true );

    echo '<h2>request</h2>';
    echo var_export( $wp->request, true );

    global $wp_the_query;
    echo '<h2>the query</h2>';
    echo var_export( $wp_the_query, true );

    exit();
}