The plugin generated xxxx characters of unexpected output

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The plugin generated xxxx characters of unexpected output

(4 posts) (3 voices)

Started 2 years ago by Ivy
Latest reply from Ivy
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activation errors

Ivy
Administrator

You can receive the following error at activation time of a plugin for a few reasons:

The plugin generated xxxx characters of unexpected output during activation.

1) There was an error that occurred at activation time on your server (try to capture and output the error message from your PHP script)
2) The PHP files have characters outside the <?php ?> tag
3) Some files got corrupted when you uploaded the plugin.

Try deactivating and reinstalling the plugin. Sometimes characters can get appended to a file when you use the standard FTP transfer. Please transfer using binary mode or just use the WordPress plugin uploader (see the video tutorial from the following link):

http://www.tipsandtricks-hq.com/ecommerce/wp-estore-quick-setup-and-usage-video-tutorial-593

Sometimes it could be that the error was shown from a minor warning message. So if you find the plugin to be working as you expect just ignore the message.

Posted 2 years ago #
johnzena
Member

One good thing to remember is to get the above error to stop showing (because it will prevent some functions from working like installing other plugins) is to log out then log back in. The error will then disappear and wordpress will function as normal.

Posted 2 years ago #
itzco
Member

I was getting this error and went in to debug it, the plugin generates a number of notices here and there, mostly reading $_POST vars that are not set. Of course in most hostings it's not a problem but on yours might be if you are here.

My specific fix:
My case (localhost, affiliate plugin) for a weird reason $wpdb was unset so lines 16-22 generated a lot of notices.
Fixed by adding this line before any use of var $wpdb (line 16)
if (!isset($wpdb)) $wpdb = $GLOBALS['wpdb'];

How to find what's causing yours:

In the file: wp-admin/includes/plugin.php add to the file at the end (Change the path(wp-content/uploads/2012), this is just an example):

add_action('activated_plugin','save_error');
function save_error(){
file_put_contents(ABSPATH. 'wp-content/uploads/2012/error_activation.html', ob_get_contents());
}

If you prefer to store the data in DB, check out this page and follow the complete instructions on debugging activation errors: http://hungrycoder.xenexbd.com/wordpress-2/how-i-have-solved-the-the-plugin-generated-xxxx-characters-of-unexpected-output-during-activation-problem.html

Posted 10 months ago #
Ivy
Administrator

Thank you for sharing your fix with us. =)

Posted 10 months ago #

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