Warning: Cannot modify header information

Well, the error says exactly what’s going on. You’re outputting content, before the data is finished being manipulated. It’s like you’re trying to echo something but WordPress still has to do some stuff and it’s telling you “No, no, let me do my thing first”. You’re calling the echo too early. In short, you’re 99% … Read more

“Warning: call_user_func_array() [function.call-user-func-array]:” above comments form [closed]

Given the error message: Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘tl_spam_free_wordpress_comments_form’ was given in /home/euanmitc/public_html/wp-includes/plugin.php on line 403 The error is being generated by whatever Plugin defines this function: tl_spam_free_wordpress_comments_form() …which appears to be Spam Free WordPress Comments. This bit: First argument is expected to be a valid callback … Read more

Displaying warning if no featured image has been set – Post Editor

you can hook yourself into save_post and check there if the image is present. if it is not there fire an admin_notice. more here https://wordpress.stackexchange.com/a/15355/32776 http://codex.wordpress.org/Plugin_API/Action_Reference/save_post Edit: I dont have the time to provide working code but here is a copy paste from the links above. i think that you have to figure what the … Read more