gistfile1.txt

$timestamp = time();
$token = ossn_generate_action_token($timestamp);

<form action="<?= ossn_site_url('action/post/add') ?>" enctype="multipart/form-data" method="post">
        <div id="post-writer">
            <div class="header">
                Schreibe einen Beitrag
            </div>
            <div class="body">

                    <div class="row">
                        <div class="col-xs-12 col-md-6">
                            <textarea name="content" id="post-content" placeholder="Was tust du gerade?"></textarea>

                            <input type="hidden" name="ossn_ts" value="<?php echo $timestamp;?>" />
                            <input type="hidden" name="ossn_token" value="<?php echo $token;?>" />
                        </div>
                        <div class="col-xs-12 col-md-6">
                            <input type="file" name="file[]" id="file" class="inputfile" data-multiple-caption="{count} Dateien ausgewählt" multiple="multiple"/>
                            <label for="file"><i class="fa fa-cloud-upload" aria-hidden="true" style="margin-right:10px;"></i>
                                <span>Bilder auswählen</span></label>
                        </div>
                    </div>

            </div>
            <div class="footer">
                <input type="submit" name="submit" class="btn btn-primary pull-right" style="width: 150px;" value="Jetzt posten" />

                <div class="clearfix"></div>
            </div>
        </div>
        </form>