diff --git a/inc/Data/Exif.php b/inc/Data/Exif.php
index 77b1011c..caf9bb82 100644
--- a/inc/Data/Exif.php
+++ b/inc/Data/Exif.php
@@ -11,4 +11,14 @@ class Exif {
 	public const EXIF_ORIENTATION_270_UPRIGHT = 7;
 	public const EXIF_ORIENTATION_270_FLIPPED = 8;
 	public const EXIF_ORIENTATION_UNDEFINED = 9;
+
+	/**
+	 * Should you switch width and height since the image is on the side?
+	 *
+	 * @param int $exif_orientation An EXIF_ORIENTATION_* constant.
+	 * @return boolean
+	 */
+	public static function exifOrientationOnSide(int $exif_orientation): bool {
+		return $exif_orientation >= 5 && $exif_orientation <= 8;
+	}
 }