How to quickly merge two images using php?

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// Load the two images you want to merge
$image1 = imagecreatefrompng('image1.png');
$image2 = imagecreatefrompng('image2.png');

// Get the dimensions of the first image
$width1 = imagesx($image1);
$height1 = imagesy($image1);

// Get the dimensions of the second image
$width2 = imagesx($image2);
$height2 = imagesy($image2);

// Create a new image to merge the two images into
$mergedImage = imagecreatetruecolor($width1, $height1);

// Copy the first image onto the merged image at position (0, 0)
imagecopy($mergedImage, $image1, 0, 0, 0, 0, $width1, $height1);

// Copy the second image onto the merged image at position (0, 0)
imagecopy($mergedImage, $image2, 0, 0, 0, 0, $width2, $height2);

// Output the merged image
header('Content-Type: image/png');
imagepng($mergedImage);

// Free up memory
imagedestroy($image1);
imagedestroy($image2);
imagedestroy($mergedImage);