JsonResponseHandler.php

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<?php
namespace Whoops\Handler;

use Whoops\Exception\Formatter;

class JsonResponseHandler extends Handler
{
    private $returnFrames = false;

    private $onlyForAjaxRequests = false;

    public function addTraceToOutput($returnFrames = null)
    {
        if (func_num_args() == 0) {
            return $this->returnFrames;
        }

        $this->returnFrames = (bool) $returnFrames;
        return $this;
    }

    public function onlyForAjaxRequests($onlyForAjaxRequests = null)
    {
        if (func_num_args() == 0) {
            return $this->onlyForAjaxRequests;
        }

        $this->onlyForAjaxRequests = (bool) $onlyForAjaxRequests;
    }

    private function isAjaxRequest()
    {
        return (
            !empty($_SERVER['HTTP_X_REQUESTED_WITH'])
            && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');
    }

    public function handle()
    {
        if ($this->onlyForAjaxRequests() && !$this->isAjaxRequest()) {
            return Handler::DONE;
        }

        $response = array(
            'error' => Formatter::formatExceptionAsDataArray(
                $this->getInspector(),
                $this->addTraceToOutput()
            ),
        );

        if (\Whoops\Util\Misc::canSendHeaders()) {
            header('Content-Type: application/json');
        }

        echo json_encode($response);
        return Handler::QUIT;
    }
}