Problem on Header

• • Reply

  14 years ago

  by radha_telanakula

  Radha

  , India

  Joined 14 years ago
  I retrieve the image from the database. I want to display that image. For that i use header.
  But i will get eroor. like
  
  header("Content-type: image/jpg");
  
  
  Warning: Cannot modify header information - headers already sent by (output started at c:\program files\easyphp1-8\www\mssi\images1.php:5) in c:\program files\easyphp1-8\www\mssi\images1.php on line 148
  
  
  
  
  
  
  
  
  
  
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• • Reply

  14 years ago

  by akicks

  Andrew Kicks

  , United Kingdom

  Joined 14 years ago
  If you have any output that is sent to the browser before you try and call header() then header's will already have been sent.
  
  Output can be any echo statement, or even just a space before the first opening <? tag.
  
  Have a look at http://uk2.php.net/manual/en/function.header.php for more information on the header() function.
  
  You can check if the headers have already been sent with
  

  <? 
  if(!headers_sent()){
  	//headers have not been sent, send headers
  	header("Content-type: image/jpg");
  }
  else{
  	//headers have been sent
  }
  ?>
  
  
  
  
  
  
  
  
  
  

   
  Have a look at output buffering to find out more about some techniques to help stop any content being sent until you are ready to.
  
  
  
  
  
  
  
  
  
  
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