PHP页面内容如下：
<form action="upshezhi" method="post" name="form_info" enctype="multipart/form-data">
<table width="100%" align="center" id="infoSub4" style="margin-top:0px;" cellpadding="0" cellspacing="0">
<tr>
<td><IFRAME ID="nEditor" src="editor" frameborder="0" scrolling="no" width="100%" height="395"></iframe></td>
</tr>
</table>
<input type="submit" value="保存更新" class="mBt" style="width:90px;">
</form>
HTML内容如下：
<script type="text/javascript" charset="utf-8" src="__PUBLIC__/Js/editor/kindeditor.js"></script>
<script type="text/javascript">
KE.show({
id : 'content_1' //TEXTAREA输入框的ID
});
</script>
<table width="100%" align="center" id="infoSub4" style="margin-top:0px;" cellpadding="0" cellspacing="0">
<tr>
<td><textarea id="content_1" name="content" style="width:700px;height:300px;"></textarea></td>
</tr>
<td class="listinfo"></td>
</table>
请问怎么在PHP里面读取content的值呢？
