html - Php working on localhost but not on server -

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i've been working on code , tested on localhost, works fine, when opload server doesn't work beyond php tags. no errors showing either. have checked both php versions , on localhost run version 5.4.7 , on server it's version 5.3.21. maybe causing problem? there should in phpinfo()? im missing in code? here code: 

    <!doctype html>     <?php phpinfo(); ?>     <html>     <head>      <script src="http://code.jquery.com/jquery-1.9.1.js"></script>     <meta charset="utf-8">      <style>      body { background:black;}     .toggle { display:none; }      p {     width:570px;   text-align:justify;   color:#686868;   font-family:georgia, serif;       }      h2 { color:black; }       button { background:#686868;       border:none;      font-family:georgia, serif;      width:570px;    }     </style>     </head>      <body>     <?php      include('sql.php');      $i = 0;      while($i < count($rows)) {     echo "     <div>         <button class='trigger'>     <table width='100%'>     <tr>         <td width='20%'><img src='http://localhost/app-side/icons/bar_icon.png' />                                </td>         <td width='80%'><h2>{$rows[$i]['titel']} </h2></td>      </tr>     </table>  </button>        <div class='toggle'>      <p>        {$rows[$i]['info']}      </p>       </div>     </div>";       $i++;     }?>      </body>     <script>      $('.trigger').click(function() {       $(this).siblings('.toggle').slidetoggle('fast');      });     </script>    </html>

when run it, shows black background (as it's suppose to) beyond php starting tag gets cut off. have tried force while loop loop 10 times , removed parts it's getting data database see if mysql related problem. can conclude it's not.

the following line problem:

<img src='http://localhost/app-side/icons/bar_icon.png

the image cannot being loaded localhost refers local computer of client (where browser runs) not server. such urls in websites considered malicious ;)

a workaround make work on both localhost , server use relative path. can relative document or relative document_root of server. i've used second approach don't know location of php file on server.

solution link relative document_root:

replace:

<img src='http://localhost/app-side/icons/bar_icon.png

by

<img src='/app-side/icons/bar_icon.png

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