example.php

<?php

class ImageHelper
{

   public function cropImage($content, $width, $height)
   {
      $image = new \Imagick();
      $image->readImageBlob($content);
      $image->setImageFormat('jpeg');
      $imageRatio = $image->getImageWidth()/$image->getImageHeight();
   
      $customRation = $width/$height;
   
      if ($customRation < $imageRatio) {
          $widthThumb = 0;
          $heightThumb = $height;
      } else {
          $widthThumb = $width;
          $heightThumb = 0;
      }
   
      $image->thumbnailImage($widthThumb, $heightThumb);
      $image->cropImage(
          $width,
          $height,
          ($image->getImageWidth() - $width)/2,
          ($image->getImageHeight() - $height)/2
      );
   
      return $image->getImageBlob();
   }
}