{if($message['message_type']=='' || $message['message_type']=='text')}{$message['message_text_html']}{/if}

   还可以输入600字

为空时，则不回复

{if($message['message_type']=='image')}
{$message['media_name']} {else if($message['message_type']=='voice')}
{$message['media_name']} {else if($message['message_type']=='video')}
{$message['media_name']} {/if}