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  #16  
Old 04-08-2012, 11:28 AM
Pandemikk Pandemikk is offline
 
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That error means PHP already sent headers and so you can't change them now. I'm not completely sure when this applies and when it doesn't (I believe it's okay once session_start() has been called), but it's because of your print_r. I suggest storing the value of the expression in your if condition and then use it later.
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