[Resolved] Object Buffering - Ignore Headers

[RossC0]

Hi,

Is there a way to use object bufferring but ignore the headers?

I'm trying to capture an image outputted from a class that has the header defined.

However, I may want to edit the image to add a water mark - but as the output buffer still outputs the header, so when edit is true I get an error:

The image “http://localhost/test.php” cannot be displayed, because it contains errors.

Sample code:

$edit = true;
ob_start();
		// (has headers in this class)
		$image->create();
		$image_data = ob_get_contents();
ob_end_clean();
if (!$edit){
  // Output the image:
  echo ($image);
}else{
   // Do something ;
  echo('hi');
}

[drew010]

try this:

list(, $image) = explode("\r\n\r\n", $image_data, 2);

that should give you the image with no headers.

[RossC0]

Sorry typo in the script:

I output the collected contents - which contain the header tag:

echo $image_data;

$edit = true;
ob_start();
        // (has headers in this class)
        $image->create();
        $image_data = ob_get_contents();
ob_end_clean();
if (!$edit){
  // Output the image:
  echo ($image_data);
}else{
   // Do something ;
  echo('hi');
}

If I try to output Hi it errors as its processed the headers set by image_create.

Any ideas how to stop them ?

[tsinka]

Hi,

what about this:

$edit = true;

if (!$edit){
  // I think you can remove the ob_??? function
  // calls in this case
  ob_start();
  // (has headers in this class)
  $image->create();
  $image_data = ob_get_contents();
  ob_end_clean();

  // Output the image:
  echo ($image_data);
}else{
   // Do something ;
  echo('hi');
}

EDIT: That might not be what you want. How does the class look like ?

Thomas

[RossC0]

Hi,

The class is JpGraph - so its fairly indepth.

Unfortunately, I actually want to edit / manipulate the image that is created.

I'm thinking my only solution is to hack / extend the class to stop the headers being sent - but this isn't ideal as it has maintance and future compatabilty issues..

[RossC0]

Not an ideal solution - but found if I added another header - I could carry on working the image..

Then add a new header to output the final image!

Confusing but it works!

$edit = true;
ob_start();
        // (has headers in this class)
        $image->create();
        header('content-type: text/html');
        $image_data = ob_get_contents();
ob_end_clean();
if (!$edit){
  // Output the image:
   header('content-type: image/png');
  echo ($image_data);
}else{
   // Do something ;
   ...
   // Output Edited image - or whatever..
   header('content-type: image/png');
   echo ($image_data);

}