phpimagick完整安装
Imagick::setCompressionQuality() is a method in PHP's Imagick extension that is used to set the compression quality for an image. This method is specifically used for compression algorithms like JPEG and PNG.

In simplest terms, the compression quality determines the amount of compression applied to an image. Higher values result in less compression and better image quality, while lower values result in more compression and lower image quality. The compression quality accepts values from 0 to 100, where 100 denotes the maximum image quality with no compression.

Here is an example of how you can use the Imagick::setCompressionQuality() method in PHP:

php
<?php
// Creating an instance of Imagick class
$image = new Imagick("image.jpg");

// Setting the compression quality to 80
$image->setCompressionQuality(80);

// Writing the modified image to disk
$image->writeImage("compressed_image.jpg");
?>


In this example, an instance of the Imagick class is created and the image file "image.jpg" is loaded. The setCompressionQuality() method is then used to set the compression quality to 80. Finally, the modified image is saved to disk using the writeImage() method with the filename "compressed_image.jpg".

You can adjust the compression quality as per your requirements to find the right balance between image quality and file size.