ДЕБЪГВАНЕ НА WORDPRESS: НАМИРАНЕ НА БАВНИ FILTERS И ACTIONS

1. Поставете новият дебъг клас в index.php файла в главната директория на Wordpress инсталацията:

<?php
class Pmc_Debug
{
    protected static $_threshold_to_hide = 0.1;
    public static function get_threshold_to_hide() {
        return static::$_threshold_to_hide;
    }
    public static function set_threshold_to_hide( $time ) {
        static::$_threshold_to_hide = (float) $time;
    }
    public static function record_action( $name ) {
        $backtrace = debug_backtrace(false);
        if ( ! isset($backtrace[2]['args']) ) {
             return;
        }
        foreach ( $backtrace[2]['args'] as &$arg ) {
            $arg = ( is_string($arg) ) ? stripslashes($arg) : $arg;
        }
        $GLOBALS['pmc_action_timer'][microtime()][] = array(
            'name' => $name,
            'backtrace' => var_export($backtrace[2], true),
        );
    }
    public static function print_recorded_actions() {
        ?>
        <hr />
        <div style="padding: 10px; background-color: white; color: black; white-space: pre; text-align: left;">
        <pre>
        <?php
        $timetotals = array();
        $break = '<hr />';
        $eol = '<br />';
        $detail_list = $eol . $eol . $break . $eol . $eol;
        $detail_list .= 'Detail action list.' . $eol;
        if ( static::get_threshold_to_hide() > 0.0 ) {
            $detail_list .= 'Hiding items faster than ' . static::get_threshold_to_hide() . ' seconds.' . $eol;
        }
        $detail_list .= $eol . $break . $eol;
        reset($GLOBALS['pmc_action_timer']);
        $previous_item = array('timestamp' => array('sec' => 0.0, 'usec' => 0.0), 'items' => array());
        do {
            if ( ! isset( $timestamp ) ) {
                $timestamp = microtime();
            }
            if ( ! isset( $items ) ) {
                $items = array();
            }
            list($usec, $sec) = explode(" ", $timestamp);
            $sec = (float) $sec;
            $usec = (float) $usec;
            $timestamp_float = $sec + $usec;
            if ( $timestamp && ! isset($start_time) ) {
                $start_time = $timestamp_float;
            } else {
                $end_time = $timestamp_float;
            }
            if ( empty($previous_items['items']) ) {
                $diff = 0.0;
                $previous_items['items'][] = array('name' => 'nothing', 'backtrace' => '');
            } else {
                $diff = $timestamp_float - ( $previous_items['timestamp']['sec'] + $previous_items['timestamp']['usec'] );
            }
            if ( $diff > static::get_threshold_to_hide() ) {
                $previous = array();
                if ( ! empty($previous_items['items']) ) {
                    foreach ( $previous_items['items'] as $previous_item ) {
                        $previous[] = $previous_item['name'];
                    }
                }
                foreach ( $items as $item ) {
                    $detail_list .= $eol . round($diff, 3) . ' seconds between starting ' . implode(', ', $previous) . ' and starting ' . $item['name'] . $eol;
                    if ( ! empty($previous_items['items']) ) {
                        foreach ( $previous_items['items'] as $previous_item ) {
                            $detail_list .= $previous_item['backtrace'] . $eol;
                        }
                    }
                    $detail_list .= $item['backtrace'] . $eol;
                }
            }
            foreach ( $items as $key => $item ) {
                $timetotals[$item['name']][] = $diff;
            }
            $previous_items['timestamp']['sec'] = $sec;
            $previous_items['timestamp']['usec'] = $usec;
            $previous_items['items'] = $items;
        } while ( list($timestamp, $items) = each($GLOBALS['pmc_action_timer']) );
        $detail_list .= $eol . $break . $eol;
        $summary_list = $eol . $eol . $break . $eol . $eol;
        $summary_list .= 'Action overview: aggregate totals.' . $eol;
        if ( static::get_threshold_to_hide() > 0.0 ) {
            $summary_list .= 'Hiding items faster than ' . static::get_threshold_to_hide() . ' seconds.' . $eol;
        }
        $summary_list .= $eol . $break . $eol;
        do {
            $total_time = 0.0;
            if ( isset($times) ) {
                foreach ( $times as $time ) {
                    $total_time += $time;
                }
            }
            if ( $total_time > static::get_threshold_to_hide() ) {
                $summary_list .= $tag . ' took approximately ' . round($total_time, 3) . ' seconds' . $eol;
            }
        } while ( list($tag, $times) = each($timetotals) );
        $summary_list .= $eol . $break . $eol;
        if ( $end_time < $start_time ) {
            $end_time = $start_time;
        }
        echo 'Request took ' . ( $end_time - $start_time ) . ' seconds from start to finish.' . $eol;
        echo $summary_list;
        echo $detail_list;
        ?>
        </pre>
        </div>
        <?php
    }
}
Pmc_Debug::record_action('bootup');

2. Поставете следния код във функциите на файла "includes/plugin.php":

function do_action($tag, $arg = “) {
   global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
   // @custom start
   Pmc_Debug::record_action($tag);
   // @custom end 
function do_action_ref_array($tag, $args) {
   global $wp_filter, $wp_actions, $merged_filters, $wp_current_filter;
   // @custom start
   Pmc_Debug::record_action($tag);
   // @custom end 
function apply_filters($tag, $value) {
   global $wp_filter, $merged_filters, $wp_current_filter;
   // @custom start
   Pmc_Debug::record_action($tag);
   // @custom end 
function apply_filters_ref_array($tag, $args) {
   global $wp_filter, $merged_filters, $wp_current_filter;
   // @custom start
   Pmc_Debug::record_action($tag);
   // @custom end

3. Влезте във футера на вашата тема "source/themes/my-theme/footer.php" и поставете веднага след "wp_footer()":

Pmc_Debug::record_action(‘done’);
Pmc_Debug::print_recorded_actions();