PDF 函数
PHP Manual

PDF_arcn

(PHP 4 >= 4.0.5, PECL pdflib >= 1.0.0)

PDF_arcnDraw a clockwise circular arc segment

说明

bool PDF_arcn ( resource $p , float $x , float $y , float $r , float $alpha , float $beta )

Except for the drawing direction, this function behaves exactly like PDF_arc().


PDF 函数
PHP Manual