WordPress hooks (actions & filters) trace.

wp-hooks-trace.php

<?php
/**
 * Plugin Name: WP hooks trace
 * Description: Enable trace > browse or work > disable trace. And everything will be written into this plugin folder /hooks-trace.txt file.
 * License: MIT
 */
// You can use this plugin for any purpose without attribution required.


add_filter('plugin_row_meta', 'rdht_pluginRowMeta', 10, 4);
function rdht_pluginRowMeta(array $plugin_meta, string $plugin_file, array $plugin_data, string $status)
{
    $thisFileName = plugin_basename(__FILE__);

    if ($plugin_file === $thisFileName) {
        $traceHooksOptions = get_transient('rdht_tracehooks');
        if ($traceHooksOptions === '1') {
            // if marked as trace hooks.
            $plugin_meta[] = '<a href="?rdht_tracehooks=false">Disable trace hooks</a>';
        } else {
            $plugin_meta[] = '<a href="?rdht_tracehooks=true">Enable trace hooks</a>';
        }
        unset($traceHooksOptions);
    }

    unset($thisFileName);
    return $plugin_meta;
}// rdht_pluginRowMeta


add_action('init', 'rdht_updateTraceOption');
function rdht_updateTraceOption(string $plugin)
{
    if (isset($_REQUEST['rdht_tracehooks']) && $_REQUEST['rdht_tracehooks'] === 'true') {
        set_transient('rdht_tracehooks', '1', time() + (2 * DAY_IN_SECONDS));
    } elseif (isset($_REQUEST['rdht_tracehooks']) && $_REQUEST['rdht_tracehooks'] === 'false') {
        delete_transient('rdht_tracehooks');
        delete_transient('rdht_tracehooks_started');
    }

    if (isset($_REQUEST['rdht_tracehooks'])) {
        $url = remove_query_arg('rdht_tracehooks');
        wp_redirect($url);
        exit();
    }
}


add_action('shutdown', 'rdht_traceHooks');
function rdht_traceHooks()
{
    $traceHooksOptions = get_transient('rdht_tracehooks');
    if ($traceHooksOptions !== '1') {
        return ;
    }
    unset($traceHooksOptions);

    if (stripos($_SERVER['REQUEST_URI'], 'plugins.php') !== false && stripos($_SERVER['REQUEST_URI'], 'rdht_tracehooks=') !== false) {
        return ;
    }

    $logFile = __DIR__ . DIRECTORY_SEPARATOR . 'hooks-trace.txt';
    $isStarted = get_transient('rdht_tracehooks_started');
    if ($isStarted !== '1') {
        if (is_file($logFile)) {
            unlink($logFile);
        }
    }
    unset($isStarted);

    $contents = '';

    global $wp_actions;
    $contents .= 'page: ' . ($_SERVER['REQUEST_URI'] ?? 'UNKNOWN') . ' method: ' . ($_SERVER['REQUEST_METHOD'] ?? 'GET') . "\n";
    $contents .= '#ACTIONS (hits) =============================' . "\n";
    if (is_iterable($wp_actions)) {
        foreach ($wp_actions as $name => $hits) {
            $contents .= $name . ' (' . $hits . ')' . "\n";
        }
        unset($hits, $name);
    }
    $contents .= 'End actions. ================================' . "\n";
    $contents .= "\n";

    global $wp_filters;
    $contents .= '#FILTERS ====================================' . "\n";
    if (is_iterable($wp_filters)) {
        foreach ($wp_filters as $name => $items) {
            $contents .= $name . "\n";
        }
        unset($items, $name);
    }
    $contents .= 'End filters. ================================' . "\n";
    $contents .= "\n";

    // end of all record (new line);
    $contents .= "\n";
    file_put_contents($logFile, $contents, FILE_APPEND);
    
    set_transient('rdht_tracehooks_started', '1', time() + (2 * DAY_IN_SECONDS));
}