Parsing Nation stock exchange data and creating chart

Question

If you want to do the job properly, you should do this all on server side and for that please refer to this answer:

How do you parse and process HTML/XML in PHP?

Otherwise this should solve your problem in a quicker way:

<html>
<head>
   <meta content="text/html; charset=UTF-8" http-equiv="content-type">
   <script src="//code.jquery.com/jquery-1.11.0.js" type="text/javascript"></script>
   <script type="text/javascript">
      $(window).load(function(){
         var strikePrice = new Array();
         $(".opttbldata").find("tr").each( function (row, currentTR) {
            if (row > 1) { // Avoid first two header rows (0 based index)
                var columnContent = $(currentTR).find("td:eq( 6 )").text();
                strikePrice[row-2] = (columnContent=="-"?" 0":columnContent); // Strike price column (0 based index)
            }
         });
         $("#NSEIndiaData").remove(); // Get rid of the loaded page/data to uncluter the DOM
         alert(strikePrice);
      });
   </script>
</head>

<body>
   <?php
      $curlSession = curl_init();
      curl_setopt($curlSession, CURLOPT_URL, 'http://www.nseindia.com/live_market/dynaContent/live_watch/option_chain/optionKeys.jsp?symbolCode=-10007&symbol=NIFTY&symbol=NIFTY&instrument=OPTIDX&date=-&segmentLink=17&segmentLink=17');
      curl_setopt($curlSession,CURLOPT_USERAGENT,'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
      curl_setopt($curlSession, CURLOPT_BINARYTRANSFER, true);
      curl_setopt($curlSession, CURLOPT_RETURNTRANSFER, true);
      $homepage = curl_exec($curlSession);
   ?>

   <div id="NSEIndiaData" style="display: none;">
      <?php var_dump($homepage); ?>
   </div>

   <?php
      curl_close($curlSession);
   ?>
</body>
</html>

All values of column 12 will be placed inside a 0 index based Array which you can later manipulate at will.