Fatal error: Uncaught Exception: FPDF error: Some data has already been output, can't send PDF file (output started at /var/www/html/export_pdf/ex_pdf_soap_v2.php:11) in /var/www/html/export_pdf/fpdf.php:273 Stack trace: #0 /var/www/html/export_pdf/fpdf.php(1060): FPDF->Error('Some data has a...') #1 /var/www/html/export_pdf/fpdf.php(1010): FPDF->_checkoutput() #2 /var/www/html/export_pdf/ex_pdf_soap_v2.php(574): FPDF->Output() #3 {main} thrown in /var/www/html/export_pdf/fpdf.php on line 273