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How link images to blog post in gallery (1 post)

  1. globalreporter
    Member
    Posted 1 year ago #

    Referring to this post: "How link images to blog post in gallery" (http://wordpress.org/support/topic/urgenthow-link-images-to-blog-post-in-gallery?replies=12)
    I don't understand where to write this code:
    $custom_url = get_post_meta($post->ID, '_custom_link', true);
    Can anyone help me, please?
    Thank you :)

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