title: Export large data issue
body: <p>I am using zend 1 and phpexcel together.</p>
  
  <p>When I export the data with limit 15000, its working fine and excel is generated but when I change the limit of data to 18000 it show me The connection was reset page.</p>
  
  <p><strong>Note</strong> : when I use the columns 13 or less then 13 its working fine but when I increase the columns for excel it show me The connection was reset page</p>
  
  <p>How can I resolve this issue, please help me.</p>