Title: php debug error is_tag()
Last modified: December 12, 2018

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# php debug error is_tag()

 *  Resolved [Acal](https://wordpress.org/support/users/acal/)
 * (@acal)
 * [7 years, 6 months ago](https://wordpress.org/support/topic/php-debug-error-is_tag/)
 * Two error messages when plugin is activated. No error messages when deactivated.
 * With wp debug enabled I get this error: Notice: is_tag was called incorrectly.
   Conditional query tags do not work before the query is run. Before then, they
   always return false. Please see Debugging in WordPress for more information. (
   This message was added in version 3.1.0.) in C:\xampp\htdocs\2\wp-includes\functions.
   php on line 4169
 * On the plugin installer page I get this error when I activate the plugin: The
   plugin generated 239 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.

Viewing 1 replies (of 1 total)

 *  Plugin Author [Daniel Iser](https://wordpress.org/support/users/danieliser/)
 * (@danieliser)
 * [7 years, 5 months ago](https://wordpress.org/support/topic/php-debug-error-is_tag/#post-11054321)
 * [@acal](https://wordpress.org/support/users/acal/) – Sorry for the delay.
 * The second error, I would suggest deleting and reinstalling the plugin. In general
   if there was an activation error there would be thousands of users complaining,
   so the most likely cause there is some php file is corrupted with whitespace.
 * Otherwise your PHP error logs would have more info hopefully on that one.
 * As for the other issue if you still need help please message us directly at [https://wppopupmaker.com/support/](https://wppopupmaker.com/support/).

Viewing 1 replies (of 1 total)

The topic ‘php debug error is_tag()’ is closed to new replies.

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## Tags

 * [errors](https://wordpress.org/support/topic-tag/errors/)

 * 1 reply
 * 2 participants
 * Last reply from: [Daniel Iser](https://wordpress.org/support/users/danieliser/)
 * Last activity: [7 years, 5 months ago](https://wordpress.org/support/topic/php-debug-error-is_tag/#post-11054321)
 * Status: resolved