<table>

<tr>

    <!-- 반복구문 -->

<td class="schedulebox" data-date="2021-09-06" >

<ul class="schedule_list">

<li class="scheduledaylist" data-id="1">

일정제목

</li>

</ul>

</td>

     <!-- 반복구문 --> 

</tr>

</table>

/* jquery 전체 아이템 데이터값 저장

$.each($(".schedulebox"), function (i, b) {

$.each($(b).find(".scheduledaylist"), function (i, c) {

sdata += ";" + $(b).attr("data-date") + ":" + $(c).attr("data-id");

});

});

$.ajax({

url : './ajax.save.php',

data : {"sdata" : sdata},

type : 'POST',

dataType : 'json',

success : function(res) {

alert(res.msg)

},

error : function(xhr, status, error){ alert(status) }

});

*/