<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Translation\Dumper;

use Symfony\Component\Translation\MessageCatalogue;

/**
 * JsonFileDumper generates an json formatted string representation of a message catalogue.
 *
 * @author singles
 */
class JsonFileDumper extends FileDumper
{
    /**
     * {@inheritdoc}
     */
    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
    {
        if (isset($options['json_encoding'])) {
            $flags = $options['json_encoding'];
        } else {
            $flags = JSON_PRETTY_PRINT;
        }

        return json_encode($messages->all($domain), $flags);
    }

    /**
     * {@inheritdoc}
     */
    protected function getExtension()
    {
        return 'json';
    }
}

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Translation\Dumper;

use Symfony\Component\Translation\MessageCatalogue;

/**
 * JsonFileDumper generates an json formatted string representation of a message catalogue.
 *
 * @author singles
 */
class JsonFileDumper extends FileDumper
{
    /**
     * {@inheritdoc}
     */
    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
    {
        if (isset($options['json_encoding'])) {
            $flags = $options['json_encoding'];
        } else {
            $flags = \defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
        }

        return json_encode($messages->all($domain), $flags);
    }

    /**
     * {@inheritdoc}
     */
    protected function getExtension()
    {
        return 'json';
    }
}

--- 
+++ 
@@ -28,7 +28,7 @@
         if (isset($options['json_encoding'])) {
             $flags = $options['json_encoding'];
         } else {
-            $flags = \defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
+            $flags = JSON_PRETTY_PRINT;
         }
 
         return json_encode($messages->all($domain), $flags);
Use some PHP 5.4 constants unconditionally

