(PHP 4, PECL pdflib >= 1.0.0)
PDF_curveto — Draw Bezier curve
$p
, float $x1
, float $y1
, float $x2
, float $y2
, float $x3
, float $y3
)
Draws a Bezier curve from the current point, using 3 more control points.
成功时返回 TRUE， 或者在失败时返回 FALSE。