How can you resize an image in PHP while maintaining the correct aspect ratio?

When resizing an image in PHP, it is important to maintain the correct aspect ratio to prevent distortion. One way to achieve this is by calculating the new dimensions based on the original aspect ratio. By determining whether the width or height should be adjusted proportionally, the image can be resized while preserving its original proportions. 

function resizeImage($imagePath, $newWidth, $newHeight){
    list($width, $height) = getimagesize($imagePath);
    $originalAspect = $width / $height;
    $newAspect = $newWidth / $newHeight;
    
    if($originalAspect > $newAspect){
        $newHeight = $newWidth / $originalAspect;
    } else {
        $newWidth = $newHeight * $originalAspect;
    }
    
    $image = imagecreatetruecolor($newWidth, $newHeight);
    $originalImage = imagecreatefromjpeg($imagePath);
    
    imagecopyresampled($image, $originalImage, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
    
    return $image;
}

Keywords

PHP image resizing aspect ratio GD library image manipulation

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