Debug Queries WordPress

debug.php

// require('/debug.php');

<?php
    if ( !defined('SAVEQUERIES') && isset($_GET['debug']) && $_GET['debug'] == 'sql' )
        define('SAVEQUERIES', true);

    if ( !function_exists('dump') ) :
        /**
         * dump()
         *
         * @param mixed $in
         * @return mixed $in
         **/

        function dump($in = null) {
            echo '<pre style="margin-left: 0px; margin-right: 0px; padding: 10px; border: solid 1px black; background-color: ghostwhite; color: black; text-align: left;">';
            foreach ( func_get_args() as $var ) {
                echo "\n";
                if ( is_string($var) ) {
                    echo "$var\n";
                } else {
                    var_dump($var);
                }
            }
            echo '</pre>' . "\n";
            return $in;
        } # dump()
    endif;

    /**
     * add_stop()
     *
     * @param mixed $in
     * @param string $where
     * @return mixed $in
     **/

    function add_stop($in = null, $where = null) {
        global $sem_stops;
        global $wp_object_cache;
        $queries = get_num_queries();
        $milliseconds = timer_stop() * 1000;
        $out =  "$queries queries - {$milliseconds}ms";
        if ( function_exists('memory_get_usage') ) {
            $memory = number_format(memory_get_usage() / ( 1024 * 1024 ), 1);
            $out .= " - {$memory}MB";
        }
        $out .= " - $wp_object_cache->cache_hits cache hits / " . ( $wp_object_cache->cache_hits + $wp_object_cache->cache_misses );
        if ( $where ) {
            $sem_stops[$where] = $out;
        } else {
            dump($out);
        }
        return $in;
    } # add_stop()


    /**
     * dump_stops()
     *
     * @param mixed $in
     * @return mixed $in
     **/

    function dump_stops($in = null) {

        if ( $_POST )
            return $in;

        global $sem_stops;
        global $wp_object_cache;
        $stops = '';

        foreach ( $sem_stops as $where => $stop )
            $stops .= "$where: $stop\n";

        dump("\n" . trim($stops) . "\n");

        if ( defined('SAVEQUERIES') && $_GET['debug'] == 'sql' ) {
            global $wpdb;
            foreach ( $wpdb->queries as $key => $data ) {
                $query = rtrim($data[0]);
                $duration = number_format($data[1] * 1000, 1) . 'ms';
                $loc = trim($data[2]);
                $loc = preg_replace("/(require|include)(_once)?,\s*/ix", '', $loc);
                $loc = "\n" . preg_replace("/,\s*/", ",\n", $loc) . "\n";
                dump($query, $duration, $loc);
            }
        }

        if ( $_GET['debug'] == 'cache' )
            dump($wp_object_cache->cache);

        if ( $_GET['debug'] == 'cron' ) {
            $crons = get_option('cron');

            foreach ( $crons as $time => $_crons ) {

                if ( !is_array($_crons) )
                    continue;

                foreach ( $_crons as $event => $_cron ) {
                    foreach ( $_cron as $details ) {
                        $date = date('Y-m-d H:m:i', $time);
                        $schedule = isset($details['schedule']) ? "({$details['schedule']})" : '';
                        if ( $details['args'] )
                            dump("$date: $event $schedule", $details['args']);
                        else
                            dump("$date: $event $schedule");
                    }
                }
            }
        }
        return $in;
    } # dump_stops()
    add_action('init', create_function('$in', '
        return add_stop($in, "Load");
        '), 10000000);
    add_action('template_redirect', create_function('$in', '
        return add_stop($in, "Query");
        '), -10000000);
    add_action('wp_footer', create_function('$in', '
        return add_stop($in, "Display");
        '), 10000000);
    add_action('admin_footer', create_function('$in', '
        return add_stop($in, "Display");
        '), 10000000);

    /**
     * init_dump()
     *
     * @return void
     **/

    function init_dump() {
        global $hook_suffix;
        if ( !is_admin() || empty($hook_suffix) ) {
            add_action('wp_footer', 'dump_stops', 10000000);
            add_action('admin_footer', 'dump_stops', 10000000);
        } else {
            add_action('wp_footer', 'dump_stops', 10000000);
            add_action("admin_footer-$hook_suffix", 'dump_stops', 10000000);
        }
    } # init_dump()
    add_action('wp_print_scripts', 'init_dump');


    /**
     * dump_phpinfo()
     *
     * @return void
     **/

    function dump_phpinfo() {
        if ( isset($_GET['debug']) && $_GET['debug'] == 'phpinfo' ) {
            phpinfo();
            die;
        }
    } # dump_phpinfo()
    add_action('init', 'dump_phpinfo');


    /**
     * dump_http()
     *
     * @param array $args
     * @param string $url
     * @return array $args
     **/

    function dump_http($args, $url) {
        dump(preg_replace("|/[0-9a-f]{32}/?$|", '', $url));
        return $args;
    } # dump_http()


    /**
     * dump_trace()
     *
     * @return void
     **/

    function dump_trace() {
        $backtrace = debug_backtrace();
        foreach ( $backtrace as $trace )
            dump(
                'File/Line: ' . $trace['file'] . ', ' . $trace['line'],
                'Function / Class: ' . $trace['function'] . ', ' . $trace['class']
                );
    } # dump_trace()
    if ( $_GET['debug'] == 'http' )
        add_filter('http_request_args', 'dump_http', 0, 2);
?>