debugging - How to debug: "HEADER ALREADY SENT" and GD2? -


i have annoying header sent error.

it not easy debug it, improve logging isolate source of issue (has described here): 

cannot send headers; headers sent in lib/varien/image/adapter/gd2.php, line 133

here line 133 of gd2.php: 

call_user_func($this->_getcallback('output'), $this->_imagehandler);

and part of method display:

public function display()     {         header("content-type: ".$this->getmimetype());         call_user_func($this->_getcallback('output'), $this->_imagehandler);     }

how go on ?

try this

disable compilation , refresh cache


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