https://legacy.forums.gravityhelp.com/topic/warning-cannot-modify-header-information-headers-already-sent-by Gravity Support Forums Topic: Warning: Cannot modify header information - headers already sent by... en-US Mon, 20 Apr 2026 08:28:47 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/warning-cannot-modify-header-information-headers-already-sent-by#post-33189 Mon, 22 Aug 2011 11:21:23 +0000 kyleoliveiro 33189@https://legacy.forums.gravityhelp.com/ <p>I'm getting the above message as an error every time I perform certain administrative actions in my WP dashboard (e.g. deleting a post, editing code in Appearance &gt; Editor, etc.)</p> <p>It seems that this problem only arises when I add the following code to my functions.php:</p> <pre><code>&lt;?php add_filter(&quot;gform_post_submission_1&quot;, &quot;gform_set_post_thumbnail&quot;); function gform_set_post_thumbnail($entry){ // get post ID of the created post $post_id = $entry[&quot;post_id&quot;]; // get the last image added to the post $attachments = get_posts(array(&#39;numberposts&#39; =&gt; &#39;1&#39;, &#39;post_parent&#39; =&gt; $post_id, &#39;post_type&#39; =&gt; &#39;attachment&#39;, &#39;post_mime_type&#39; =&gt; &#39;image&#39;, &#39;order&#39; =&gt; &#39;ASC&#39;)); if(sizeof($attachments) == 0) return; //no images attached to the post // set image as the post thumbnail set_post_thumbnail($post_id, $attachments[0]-&gt;ID); }</code></pre> <p>I require this code as its function is to set the image uploaded in my Gform to be the Featured Image of the user-submitted post.</p> <p>Would appreciate any help on this matter :)</p> <p>EDIT: Resolved this myself. I simply moved the code that I quoted above to the top of functions.php. </p>