PHP code to create high-definition images without distortion_PHP tutorial

To generate high-definition images in PHP, you must use the imagecreatetruecolor function. Let’s see how it is used. imagecreatetruecolor(int x, int y) creates a black image of size and y. The example it gives does not add a background color to the generated pixels, but directly uses imagecolorallocate() to create a drawing color.

In the PHP tutorial, to generate high-definition images, you must use the imagecreatetruecolor function. Let’s see how it is used

imagecreatetruecolor(int x, int y) creates a black image of size and y. The example it gives does not add a background color to the generated pixels, but directly uses imagecolorallocate() to create a Color of drawing
*/
//Create image
$im=imagecreatetruecolor(100,100);
//Set the background to red
$red=imagecolorallocate($im,255,0,0);
imagefill($im,0,0,$red);
//Output image
header('content-type: image/png');
imagepng($im);
imagedestroy($im);
/*
Executing this code will generate a graphic with a red background.
*/

//Code 2

//Create true color images
$img=imagecreatetruecolor(400,400);
//Perform operations through loop
for($i=10;$i<=350;$i=$i+20)
{
//Define color
$color=imagecolorallocate($img,200,50,$i);
//Draw an ellipse
imageellips tutorial e($img,200,200,350,$i,$color);
}
//Output image
header("content-type: image/png");
imagepng($img);
//Destroy image
imagedestroy($img);
/*
The execution result of this code is shown in Figure 22.7:
*/
//Code 3

//Create true color images
$img=imagecreatetruecolor(200,200);
$white=imagecolorallocate($img,255,255,255);
$red=imagecolorallocate($img,255,0,0);
$blue=imagecolorallocate($img,0,0,255);
//Draw on the image
imagearc($img,100,100,50,150,360,0,$red);
imagearc($img,100,100,150,50,0,360,$blue);
//Output image
header("content-type: image/png");
imagepng($img);
//Destroy image
imagedestroy($img);
/*
The execution result of this code is shown in Figure 22.6:
*/

//Example 4

//Send header file
header("content-type: image/png");
//Create image, output content if failed
$im=imagecreatetruecolor(500,500); //Create image
//Define background color
$black=imagecolorallocate($im,0,0,0);
//Define line color
$color=imagecolorallocate($im,0,255,255);
//Draw a dotted line on the image
imageline($im,1,1,450,450,$color);
//Output image file
imagepng($im);
//Destroy image
imagedestroy($im);