How can the quality of resized images be improved in PHP when using functions like ImageCreateFromPNG?

When resizing images in PHP using functions like ImageCreateFromPNG, the quality of the resized images can be improved by using the imagecopyresampled function instead of imagecopyresized. This function provides better quality results by using interpolation techniques to smooth out the resized image. 

// Load the original image
$originalImage = imagecreatefrompng('original.png');

// Create a new image with the desired dimensions
$newWidth = 200;
$newHeight = 150;
$resizedImage = imagecreatetruecolor($newWidth, $newHeight);

// Resize the original image to the new dimensions using imagecopyresampled
imagecopyresampled($resizedImage, $originalImage, 0, 0, 0, 0, $newWidth, $newHeight, imagesx($originalImage), imagesy($originalImage));

// Save or output the resized image
imagepng($resizedImage, 'resized.png');

// Free up memory
imagedestroy($originalImage);
imagedestroy($resizedImage);

Keywords

ImageCreateFromPNG image resizing image quality PHP functions image manipulation

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