PHP Resizing and Watermarking Images

Introducing the GD extension Getting an image’s dimensions and MIME type Checking the MIME type and dimensions of a WebP image

Resizing an image with imagecopyresampled() Scaling an image with imagescale() Generating the output images Setting output sizes and quality

Adding an optional watermark Adding a text watermark Adding an image watermark Checking source images and orientation Correcting an image’s orientation Converting to a different image format Setting up the class definition Using the script