PHPGD库

$img = imagecreatetruecolor(500,500);

$white = imagecolorallocate($img,255,255,255);
$black = imagecolorallocate($img,0,0,0);
$red = imagecolorallocate($img,255,0,0);
$blue = imagecolorallocate($img,0,0,255);
$green = imagecolorallocate($img,0,255,0);

imagefill($img,0,0,$black);

imagesetpixel(画布资源,坐标x,坐标y,颜色);

imagesetpixel($img,255,255,$white);

imageline(画布资源,起点x,起点y,终点x,终点y,颜色);

imageline($img,100,100,200,200,$white);

imagerectangle(画布资源,起点x,起点y,终点x,终点y,颜色);
imagefilledrectangle(画布资源,起点x,起点y,终点x,终点y,颜色);//填充(filled)

imagerectangle($img,100,100,400,400,$white);
imagefilledrectangle($img,100,100,400,400,$white);

imagepolygon($img,array(各坐标),几边形,颜色);
imagefilledpolygon($img,array(各坐标),几边形,颜色);//填充

imagepolygon($img,array(100,100,100,400,400,400),3,$white);
imagefilledpolygon($img,array(100,100,100,400,400,400),3,$white);

imageellipse(画布资源,圆心x,圆心y,x长,y长,颜色);
imagefilledellipse(画布资源,圆心x,圆心y,x长,y长,颜色);//填充

imageellipse($img,250,250,400,300,$white);
imagefilledellipse($img,250,250,400,300,$white);

imagettftext(画布资源,大小,弧度,开始x,开始y,颜色,字体,文本);

imagettftext($img,30,45,100,200,$white,'./font/1.ttf','hahahhahaha');

header("content-type:image/jpeg");
imagejpeg($img);

imagedestroy($img);