01 $width = 500;02 $height = 500;03 04 $im = imagecreatetruecolor($width, $height);05立即学习“PHP免费学习笔记（深入）
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06 $red = imagecolorallocate($im, 230, 0, 0);07 imagefill($im, 0, 0, $red);08 09 $yellow = imagecolorallocate($im, 255, 255, 0);10 11 //设定画出五角星的五个顶点形成的 正五边形的边长12 $b=100;13 $pi=3.14/180;14 15 $p1x = 150;16 $p1y = 250;17 18 $p2x = 150+(cos(36*$pi)*$b);19 $p2y = 250-(sin(36*$pi)*$b);20 21 $p3x = 150+(2*cos(36*$pi)*$b);22 $p3y = 250;23 Red Panda AI AI文本生成图像下载24 $p4x = $p3x-sin(18*$pi)*$b;25 $p4y = 250+cos(18*$pi)*$b;26 27 $p5x = 150+sin(18*$pi)*$b;28 $p5y = 250+cos(18*$pi)*$b;29 30 //连接相应的点 画线31 imageline($im, $p1x, $p1y, $p3x, $p3y, $yellow);32 imageline($im, $p1x, $p1y, $p4x, $p4y, $yellow);33 34 imageline($im, $p2x, $p2y, $p4x, $p4y, $yellow);35 imageline($im, $p2x, $p2y, $p5x, $p5y, $yellow);36 37 imageline($im, $p3x, $p3y, $p5x, $p5y, $yellow);38 39 header('Content-Type:image/png');40 41 imagepng($im);42 43 imagedestroy($im);44 45 ?>