Removed duplicated code

src/PelJpeg.php

@@ -148,6 +148,23 @@ public function __construct($data = false)
         }
     }
 
+    /**
+     * JPEG sections start with 0xFF. The first byte that is not
+     * 0xFF is a marker (hopefully).
+     *
+     * @param PelDataWindow $d
+     *
+     * @return integer
+     */
+     protected static function getJpgSectionStart($d) {
+         for ($i = 0; $i < 7; $i ++) {
+             if ($d->getByte($i) != 0xFF) {
+                  break;
+             }
+         }
+         return $i;
+    }
+
     /**
      * Load data into a JPEG object.
      *
@@ -179,19 +196,11 @@ public function load(PelDataWindow $d)
          * no data left in the window.
          */
         while ($d->getSize() > 0) {
-            /*
-             * JPEG sections start with 0xFF. The first byte that is not
-             * 0xFF is a marker (hopefully).
-             */
-            for ($i = 0; $i < 7; $i ++) {
-                if ($d->getByte($i) != 0xFF) {
-                    break;
-                }
-            }
+            $i = $this->getJpgSectionStart($d);
 
             $marker = $d->getByte($i);
 
-            if (! PelJpegMarker::isValid($marker)) {
+            if (!PelJpegMarker::isValid($marker)) {
                 throw new \lsolesen\pel\PelJpegInvalidMarkerException($marker, $i);
             }
 
@@ -655,11 +664,7 @@ public static function isValid(PelDataWindow $d)
         /* JPEG data is stored in big-endian format. */
         $d->setByteOrder(PelConvert::BIG_ENDIAN);
 
-        for ($i = 0; $i < 7; $i ++) {
-            if ($d->getByte($i) != 0xFF) {
-                break;
-            }
-        }
+        $i = self::getJpgSectionStart($d);
 
         return $d->getByte($i) == PelJpegMarker::SOI;
     }