(PECL imagick 2, PECL imagick 3)
Imagick::cropThumbnailImage — Creates a crop thumbnail
public Imagick::cropThumbnailImage ( int $width , int $height [, bool $legacy = false ] ) : bool
Creates a fixed size thumbnail by first scaling the image up or down and cropping a specified area from the center.
width
The width of the thumbnail
height
The Height of the thumbnail
 Returns true on success. 
Throws ImagickException on error.
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    https://www.php.net/manual/en/imagick.cropthumbnailimage.php