Title: WordPress Gone Wild!
Last modified: August 19, 2016

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# WordPress Gone Wild!

 *  [vermontjohn](https://wordpress.org/support/users/vermontjohn/)
 * (@vermontjohn)
 * [16 years, 4 months ago](https://wordpress.org/support/topic/wordpress-gone-wild/)
 * yesterday I did an automatic upgrade to 2.9. When it was done, I got this error.
   In fact the error is showing all over the place.
 * Anyone know how to fix this?
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/content/n/a/k/nakedinvt/html/barackobama/wp-admin/includes/dashboard.
   php:719) in /home/content/n/a/k/swordman/html/sensual/wp-includes/class-json.
   php on line 238

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Thread Starter [vermontjohn](https://wordpress.org/support/users/vermontjohn/)
 * (@vermontjohn)
 * [16 years, 4 months ago](https://wordpress.org/support/topic/wordpress-gone-wild/#post-1325696)
 * I did just disable some plugins and found the problem to be the INTENSE DEBATE
   plugin!
 * It is disabled and the blog is working fine now and the errors are gone.
 * Now….any idea as to what to do about getting Intense Debate to work again????
   It seems to be very popular and my site visitors use it constantly.
 *  [alism](https://wordpress.org/support/users/alism/)
 * (@alism)
 * [16 years, 4 months ago](https://wordpress.org/support/topic/wordpress-gone-wild/#post-1325709)
 * There’s a good chance this will be fixed in 2.9.1.
 * So you can either install the release candidate for that:
    [http://wordpress.org/wordpress-2.9.1-RC1.zip](http://wordpress.org/wordpress-2.9.1-RC1.zip)
 * Just try the patch if you don’t want to install the whole RC:
    [http://core.trac.wordpress.org/ticket/11537](http://core.trac.wordpress.org/ticket/11537)
 * Or if you can hold on 48 hours or so, it’ll probably be available through the
   automatic upgrade when it’s officially released.
 * If it’s still not fixed after that, it might be worth contacting the intense 
   debate author.
 *  [pivic](https://wordpress.org/support/users/pivic/)
 * (@pivic)
 * [16 years, 4 months ago](https://wordpress.org/support/topic/wordpress-gone-wild/#post-1325715)
 * I’ve had the problem with “class-json.php on line 238” and have actually tried
   switching class-json.php for the one in the RC1 package, but that didn’t help.
 * I like Intense Debate! Will contact them to see what’s up.
 * Thanks a lot for the solution!
 *  [Beau Lebens](https://wordpress.org/support/users/beaulebens/)
 * (@beaulebens)
 * [16 years, 4 months ago](https://wordpress.org/support/topic/wordpress-gone-wild/#post-1325952)
 * Hi All (and thanks for the email pivic),
 * It seems that there are a few things going on here:
 * 1. Some people don’t have the core PHP JSON extension installed/enabled, so they
   require an additional library to be loaded for certain things (e.g. IntenseDebate)
   to work.
    2. WP 2.9 introduced a new core JSON library, which will override the
   one included in IntenseDebate. That should theoretically be fine but 3. 2.9’s
   JSON library also had a bug in it, where it was sending unnecessary headers to
   the browser.
 * This problem only seems to manifest itself on a server where the JSON extensions
   are not enabled, and where you’re running WP 2.9.
 * The ideal solution is to enable JSON on your server, but unless you have full
   control over your server, that’s probably not possible. [@pivic](https://wordpress.org/support/users/pivic/)
   you said that you tried getting the class-json.php from RC1 — was that specifically
   for wp-includes/class-json.php?
 * Can other folks please try replacing their WP file at wp-includes/class-json.
   php with this one: [http://core.trac.wordpress.org/browser/trunk/wp-includes/class-json.php](http://core.trac.wordpress.org/browser/trunk/wp-includes/class-json.php)(
   use the links down the very bottom to download).
 * If that doesn’t work, please let me know what version of PHP you’re using on 
   your server so that I can look into this a bit more, as I’m not actually seeing
   this error on any of my installs so it’s tricky to debug.
 * Thanks for your help and patience!
 * Beau (from IntenseDebate)

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘WordPress Gone Wild!’ is closed to new replies.

## Tags

 * [Cannot modify header information](https://wordpress.org/support/topic-tag/cannot-modify-header-information/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 4 participants
 * Last reply from: [Beau Lebens](https://wordpress.org/support/users/beaulebens/)
 * Last activity: [16 years, 4 months ago](https://wordpress.org/support/topic/wordpress-gone-wild/#post-1325952)
 * Status: not resolved

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