I´m running a website using Yoast SEO and from unknown reasons the images of my posts are not shown if I share the links on social media. I found the following post which recommends to replace "og:image" by "og:image:secure_url", since the image is located on an https url. how to fix facebook open graph images... So I added the following code to my functions.php file: (I deleted some lines which create an additional metatag for og:image with an http url since I do not need that.) function check_ssl_facebook_opengraph_image($image) { $og = "og:image"; if (preg_match('/^https/', $image)) { echo '<meta property="'. $og . ':secure_url" content="'. $image . '" />' . "\n"; } } // Hook into the Yoast plugin's hooks for handling the OG image add_action('wpseo_opengraph_image', 'check_ssl_facebook_opengraph_image'); Unfortuntaly the code doesn´t replace the line in my wp-theme but adds a new line. As a result the post does include og:image and og:image:secure_url metatags with the same url. I want to delete og:image from my post now since the image is still not visible if I post the link to social media. Perhaps it will be visible if only og:image:secure_url is present in my post. I´m an absolute beginner with php. Can someone tell me how to delete the unneccessary og:image metatag after the secure_url string has been added? Thanks in advance Marc