tp3.2的ajax（保留下）

<script>
    $(".askCheng").click(function(){
        var user_id = $("input[name='user_id']").val(),
                course_id = $("input[name='course_id']").val(),
                section_id = $("input[name='section_id']").val(),
                content = $(".bijicheng").val();

        if(content==null||content==""){
            alert("内容不能为空");
            return false;
        }
        $.ajax(
                {
                    type : "post",
                    url : "{:U('course/Course/postbiji')}",
                    data: {'user_id':user_id,'course_id':course_id,'section_id':section_id,'content':content},
                    dataType:"TEXT",
                    success : function (json)
                    {

                        if (json.status==1) {
                            alert(json.data);
                        }
                    },dataType:'json'
                });
        return false;

    })
</script>

//后台操作

public function postbiji(){
    $data['user_id'] = $_POST['user_id'];
    $data['course_id'] = $_POST['course_id'];
    $data['section_id'] = $_POST['section_id'];
    $data['content'] = $_POST['content'];
    $data['created_at'] = time();

    if($this->sectionBiji->add($data)){
        $this->ajaxReturn(array(
            'data'=>'记录成功',
            'info'=>'success',
            'status'=>1
        ));
    }

}