The Imagick::setCompression() function is an inbuilt function in PHP which is used to set the object’s default compression type.
Syntax:
bool Imagick::setCompression( int $compression )
Parameters: This function accepts single parameter $compression which holds an integer matching to one of Imagick::COMPRESSION_* constants.
Return Value: This function returns TRUE on success.
Below programs illustrate the Imagick::setCompression() function in PHP:
Program 1:
<?php   // Create a new imagick object $imagick = new Imagick(   // Get the Compression $compression = $imagick->getCompression();   echo $compression; ?> |
Output:
0 (which corresponds with imagick::COMPRESSION_UNDEFINED)
Program 2:
<?php   // Create a new imagick object $imagick = new Imagick(   // Set the Compression $imagick->setCompression(5);   // Get the Compression $compression = $imagick->getCompression();   echo $compression; ?> |
Output:
5 (which corresponds with imagick::COMPRESSION_JPEG)
Reference: https://www.php.net/manual/en/imagick.setcompression.php
