Handler for logging last error even when fatal

shutdown_handler.php

class ShutdownHandler
{
    private $catch;
    private $error;

    public function __construct($catch = null)
    {
        $this->catch = $catch ?: E_ERROR | E_PARSE;
    }

    private function getError()
    {
        $this->error = error_get_last();
    }

    private function isPanicWorthy()
    {
        if (!is_null($this->error)) {
            return $this->error['type'] & $this->catch;
        }
        return false;
    }

    public function panic()
    {
        $this->getError();
        if ($this->isPanicWorthy()) {
            /**
            * Send error metrics to Librato, New Relic,
            * via email or whatever.
            */
        }
    }
}

register_shutdown_function([new ShutdownHandler(), 'panic']);