(PECL ps >= 1.1.0)
ps_curveto — Draws a curve
$psdoc
   , float $x1
   , float $y1
   , float $x2
   , float $y2
   , float $x3
   , float $y3
   )Add a section of a cubic Bézier curve described by the three given control points to the current path.
psdocResource identifier of the postscript file as returned by ps_new().
x1x-coordinate of first control point.
y1y-coordinate of first control point.
x2x-coordinate of second control point.
y2y-coordinate of second control point.
x3x-coordinate of third control point.
y3y-coordinate of third control point.
   Returns TRUE on success or FALSE on failure.