WordPress dbDelta returns a SQL error when updating a table. It returns “Multiple primary key defined“.
I was stuck for two days on this problem. WordPress shown me following error message on plugin activation
The plugin generated 202 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.
Today I have discovered a strange problem of WordPress / Apache. WordPress / Apache is unable to handle an URL with a query string parameter containing a link of external domain (Cross Domain). It shows not found page. I am trying call a static story.html file from my upload directory. I have to pass some query string with URL of my story.html file. But when I am trying to pass some query parameter in the URL then I am going to a not found page. Continue reading