cpdf_setlinecap
    (PHP 3>= 3.0.8, PHP 4 , PHP 5)
cpdf_setlinecap -- Sets linecap parameter
Description
bool 
cpdf_setlinecap ( int pdf_document, int value )
     The cpdf_setlinecap() function set the linecap
     parameter between a value of 0 and 2. 
     0 = butt end, 1 = round, 2 = projecting square. Returns TRUE on success or FALSE on failure.