使用PHP GD将图像放置到另一个图像的中心

Question

I need to place an image to the center of another image(both horizontally and vertically) with dimension 700*350. I'm trying with the following code. But I'm getting image as stretched.

@header("Content-Type: image/png");
$imageURL = "flower.jpg";

// create a transparent background image for placing the $imageURL image
$imageResource  = imagecreatetruecolor(700, 350);
imagesavealpha($imageResource, true);

$transparentColor  = imagecolorallocatealpha($imageResource, 0, 0, 0, 127);
imagefill($imageResource, 0, 0, $transparentColor);
$backgroundImage = imagecreatefromjpeg($imageURL);
list($width, $height) = getimagesize($imageURL);
imagecopyresampled($imageResource, $backgroundImage, 350, 175, 0, 0, 700, 350, $width, $height);
imagepng($imageResource, "newimage.jpg");

This is not centering the image and also the file flower.jpg is getting deleted when I run this code. What I'm doing wrong in this?

Can anyone please help me to fix this? Thanks in advance.

Answer 1

So you need something like this?

@header("Content-Type: image/png");
$imageURL = "flower.jpg";

// create a transparent background image for placing the $imageURL image
$imageResource  = imagecreatetruecolor(700, 350);
imagesavealpha($imageResource, true);

$transparentColor  = imagecolorallocatealpha($imageResource, 0, 0, 0, 127);
imagefill($imageResource, 0, 0, $transparentColor);
$backgroundImage = imagecreatefromjpeg($imageURL);
list($width, $height) = getimagesize($imageURL);

imagecopyresampled($imageResource, $backgroundImage, 175, 85, 0, 0, 350, 175, $width, $height);
imagepng($imageResource, "newimage.jpg");
imagedestroy($imageResource);
imagedestroy($backgroundImage);

You had specified the center of the destination image as the destination coordinates and the whole destination image size instead of needed dimentions of the center rectangle into which the source image would be resized.

Also you didn't do imagedestroy, which you totally should.