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July 22, 2013 at 9:06 pm
#144143
chrisburton
Participant
Ok so the following is the file you want to include:
http://domain[.]com/test/wp-content/mu-plugins/metaboxes/meta_box.php
Now, what is the path to the file where you’re placing the include_once
?
Also, I just noticed the HEADER error. Did you change any core files?