php - Blank white space on top of the webpage -


what possible cause blank space on top of page

i want provide photo clarification due low reputation in stackoverflow couldn't upload it. using smarty php template engine.

<html>     <head>         {include file="_js.tpl"}         <title>{$title|escape}</title>         <meta http-equiv="content-type" content="text/html; charset=utf-8">         {literal}             <style type="text/css">                 body{                     margin:0;                     padding:0;                     display: block;                     font-family: arial;                 }                  #main_iframe                  {                     position: relative;                     width: 100%;                     height:665px;                     border:0px;                          }                  #iframe_setting{                     padding-left: 220px;                     background: url('{/literal}{$vir_img}{literal}background.png');                 }                 #content-wrapper{                     height: 665px;                     padding-left: 10px;                  }              </style>              <script type="text/javascript">                 $(document).ready(function(){                     $("button#logout").click(function(){                         window.location = "{/literal}{$url_app}{literal}?m=account&c=do_logout";                     });                  });                  function go(loc)                 {                     document.getelementbyid('main_iframe').src=loc;                 }                  function go3(loc)                 {                     document.getelementbyid('iframeid').src=loc;                 }             </script>         {/literal}     </head>         <body>{include file="header.tpl"}                 <div style="position:absolute;z-index: 999;">                     {include file="sidebar.tpl"}                 </div>                     <div id="iframe_setting">                         <div id="content-wrapper">                             {$content}                         </div>                     </div>                     {include file="footer.tpl"}         </body> </html>

using notepad++, make sure files included in file, itself, "encode in utf-8 without bom". so, follow below:

in notpad++ -> (menu) encoding -> (click) encode in utf-8 without bom

this happens if have used utf8 characters , saved file utf8. then, there 3 invisible characters causes white space.


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