Ping. The ping heard across the world

If you’re wondering why trackbacks and pings aren’t working on your blog then you might want to do what I did earlier today: allow your blog to talk to other servers.

WordPress needs either allow_url_fopen to be set On or to have the Curl extension loaded. If you’re having problems receiving pings from other blogs then both of these are probably turned off or missing. Wouldn’t it be nice if Options->Discussion warned that pings wouldn’t work?

Look in your php.ini, or the output of phpinfo() to check for both. If you want to enable fopen, then the entry in php.ini should look like this:

;;;;;;;;;;;;;;;;;;
; Fopen wrappers ;
;;;;;;;;;;;;;;;;;;

; Whether to allow the treatment of URLs (like http:// or ftp://) as files.
allow_url_fopen = On

I switched to Litespeed web server a while back and by default allow_url_fopen is set to Off and the curl library isn’t included. Check /opt/lsws/php/php.ini and make sure remote fopens are allowed!

Thanks Barry for helping me fix that.

PS. if you linked to this blog recently, feel free to save your post again. WordPress will ping my site again and this time the ping will get through.