$image = new Imagick('image.jpg'); $image->setFormat('png'); $image->writeImage('output.png');
$image = new Imagick('image.png'); if ($image->setFormat('jpeg')) { header('Content-Type: image/jpeg'); echo $image; }This example shows how the setFormat function can be used to dynamically modify an image format before outputting it to the browser. We first create an Imagick object from an existing PNG file 'image.png'. If the format change to JPEG is successful, we set the Content-Type header to image/jpeg and output the modified image using echo. The Imagick setFormat function is part of the Imagick package library, which is a PHP extension for creating and modifying images using ImageMagick.