Activate Thumbnail Cropping in WordPress

This code snippet will activate cropping for all thumbnail sizes.

Add this to functions.php file

// Standard Size Thumbnail
if(false === get_option("thumbnail_crop")) {
     add_option("thumbnail_crop", "1"); }
     else {
          update_option("thumbnail_crop", "1");
     }

// Medium Size Thumbnail
if(false === get_option("medium_crop")) {
     add_option("medium_crop", "1"); }
     else {
          update_option("medium_crop", "1");
     }

// Large Size Thumbnail
if(false === get_option("large_crop")) {
     add_option("large_crop", "1"); }
     else {
          update_option("large_crop", "1");
      }