Introduction to PHP drawing technology

//Basic steps of drawing technology Prerequisite: Enable the gd library in the php.ini file
//Create a canvas with a default background of black
$img=imagecreatetruecolor(400,300) ;
//Draw various graphics
//Create a color
$background = imagecolorallocate($img, 255, 0, 0);
//Draw a circle
//imageellipse($img,30,30,50,50 ,$background);
//Ellipse
//imageellipse($img,30,30,50,30,$background);
//Draw a straight line
//imageline($img,0,0,400,300,$background);
//Draw a rectangle
//imagerectangle ($img, 50, 20, 100, 40, $background);
//Fill the rectangle
//imagefilledrectangle ($img, 50, 20, 100, 40, $background);
//Draw an arc
//imagearc($img, 100, 100, 150, 150, 180, 270, $background);
//Draw a fan-shaped IMG_ARC_CHORD straight line connecting the starting and ending points IMG_ARC_PIE
//imagefilledarc ($img, 100, 100, 150, 150, 180, 270, $background,IMG_ARC_PIE);
//Copy the image to the canvas
/*$scrImg=imagecreatefromgif('http:/ /www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif');
$scrImgInfo=getimagesize('http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif');
imagecopy ($img,$scrImg,10 ,10,0,0,$scrImgInfo[0],$scrImgInfo[1]);
*/
//imagecopy ($img,$scrImg,10,10,0,0,270,129);
< ;p>//Write words
//imagestring ($img, 5, 20, 20, "hello,world", $background);
//Write Chinese
$str="PHP painting technology";
imagettftext ($img , 30 , 0 , 50 ,50, $background , "MSYHBD.TTF" , $str);
//Output the image to the web page (or save it as)
header("content-type: image/png");
imagepng ($img);
//Destroy the image (release memory)
imagedestroy($img);
?>