I've edited the page.php to this

class Page extends SiteTree {

   static $db = array(

      'LinkPage' => 'Text'
   );
   
    static $has_one = array(
       'LinkImage' => 'Image',
       'LinkToSiteTree' => 'SiteTree'

   );
.
.
.
function getCMSFields() {
      $fields = parent::getCMSFields();
      

      $fields->addFieldToTab('Root.Content.HeaderImageBanner', new TextField("LinkPage", "Link (e.g. http://example.com)"));
      $fields->addFieldToTab('Root.Content.HeaderImageBanner', new HeaderImageBannerField("LinkImageID","Image to display (from assest uploaded to 'widgets' folder)"));

      return $fields;
   }

.
.
.
   public function getLinkToPage() {
      $strURL = '';
      if (!empty($this->LinkPage)) {
         $strURL = $this->LinkPage;
         if (!strpos($strURL, 'http') === 0) {
            $strURL = $this->BaseHref().$strURL;
         }
      }
      else {
         if (isset($this->LinkToSiteTreeID) && is_numeric($this->LinkToSiteTreeID)) {
            $page = DataObject::get_by_id('SiteTree',$this->LinkToSiteTreeID);
            if ($page) {
               $strURL = $this->BaseHref().$page->RelativeLink();
            }
         }
      }

      return $strURL;
   }

   function getLinkImageTag() {
      if (isset($this->LinkImageID) && is_numeric($this->LinkImageID)) {
         return DataObject::get_by_id('Image',$this->LinkImageID);
      }
      return null;
   }

what it does it will save the image link and the image.

my question is how can i inherit its output to all pages of my site? (header)

I'm using SS 2.4

Thank you in advance

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