Server side error detection WordPress

server-side-error-detection.php

<?php
/*
 * Some plugins set 5xx status when code runs through expected flows. 
 * This is to track this since it does not trigger any PHP error logs, 
 * so that you have some idea why a site fails with 5xx.
 */
add_action ('status_header', function ($status_header, $code, $description, $protocol) {
    if ( $code >= 500 ) {
        $backtrace = Logger::debugBacktrace();
        $this->logger->error( "Server-side error detected: $status_header. Backtrace: $backtrace" );
    }

    return $status_header;
}, 10, 4);