ajax pagination and search

//控制器
function  show(Request  $request){
    $page=$request->page?$request->page:1;
    $size=4;
    $pian=($page-1)*$size;
    $sql=DB::select("select * from scores ");
    $count=count($sql);
    $end=ceil($count/$size);
    $res=DB::select("select * from scores limit $pian,$size");
    return  view("show",["data"=>$res,"end"=>$end]);
}

//视图层

<input type="text"  name="sou" id="sou"><input type="button" value="搜索" class="page">

<input type="hidden" value="1" id="shou">
<input type="hidden" value="<?=$end?>" id="wei">
<a href="#" class="page">首页</a>
<a href="#" class="page">上一页</a>
<a href="#" class="page">下一页</a>
<a href="#" class="page">尾页</a>

$(document).on("click",".page",function () {
      shou=$("#shou").val();
    wei=$("#wei").val();
    text=$(this).text();
    sou=$("#sou").val();

    if (text=="首页"){
         page=1;
    } else if(text=="上一页"){
         page=parseInt(shou)-1<1?1:parseInt(shou)-1;
    }else if(text=="下一页"){
        page=parseInt(shou)+1>wei?wei:parseInt(shou)+1;
    }else if(text=="尾页"){
        page=wei
    }else {
        page=1
    }
    alert(page)
    $.ajax({
        url:"fen",
        type:"post",
        dataType:"json",
        data:{
            page:page,
            sou:sou
        },
        success:function (data) {
          str="";
         $.each(data,function (k,v) {
             str+= '<tr>'
             str+= '<td>'+v.id+'</td>'
             str+= '<td>'+v.name+'</td>'
             str+= '<td>'+v.monty+'</td>'
             str+= '<td><image src="../'+v.file+'" width="100" height="100" ></image></td>'
             str+= '<td>'+v.type+'</td>'
             str+= '</tr>';
         })
           $("#tb").html(str);
           $("#shou").val(page);
        }
    })

})

function  fen(requset $req){
     $sou=$req->post("sou");
     if (empty($sou)){
         $page=$req->post("page")?$req->post("page"):1;
         $size=4;
         $pian=($page-1)*$size;
         $sql=DB::select("select * from goods");
         $count=count($sql);
         $end=ceil($count/$size);
         $res=DB::select("select * from goods limit $pian,$size");

         return  json_encode($res);
     }else{
         $page=$req->post("page")?$req->post("page"):1;
         $size=4;
         $pian=($page-1)*$size;
         $sql=DB::select("select * from goods");
         $count=count($sql);
         $end=ceil($count/$size);
         $res=DB::select("select * from goods   where name like '%$sou%'"  );

         return  json_encode($res);
     }


}