如何获取dr_fieldform生成的百度富文本框内的数据

我采用

<div class="chat_input" method="post" id="myform1">

                        <?php echo dr_fieldform('{"name":"聊天内容","fieldname":"chatContent","ismain":"1","fieldtype":"Ueditor","setting":{"option":{"enter":"0","down_img":"0","watermark":"0","show_bottom_boot":"0","autofloat":"0","remove_style":"0","div2p":"0","duiqi":"0","autoheight":"0","page":"0","mode":"3","tool":"\'emotion\',\'attachment\'","mode2":"3","tool2":"\'emotion\',\'attachment\'","mode3":"3","tool3":"\'emotion\',\'attachment\'","attachment":"0","image_endstr":"","value":"","width":"100%","height":"130","css":""},"validate":{"required":"0","pattern":"","errortips":"","check":"","filter":"","formattr":"","tips":""}},"ismember":"1"}', $chatContent, 1, 1);?>

                        <button class="sendButton" onclick="send()"><span class="sendText">发送</span></button>

                    </div>

生成百度富文本框后，不清楚应该如何获取富文本框内的数据，请教诸位大佬，如何获取dr_fieldform生成的百度富文本框内的数据？