PHP Manual . ... Next . 3.0.8 - 3.0.18 only, PHP 4 >= 4.0.0) cpdf_curveto -- Draws a curve . void cpdf_curveto ( int pdf document, float x1, float y1, float x2, float y2, float x3, float y3 [, int mode]) . The cpdf_curveto() function draws a Bezier curve from the current point to the point ( x3 , y3 ) using ( x1 , y1 ) and ( x2 , y2 ) as control points. The optional parameter mode determines the unit length. If it's 0 or omitted the default unit as specified for the page is used. ...