Title: Call to undefined function is_plugin_active()
Last modified: March 15, 2019

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# Call to undefined function is_plugin_active()

 *  [dedrago](https://wordpress.org/support/users/dedrago/)
 * (@dedrago)
 * [7 years, 3 months ago](https://wordpress.org/support/topic/call-to-undefined-function-is_plugin_active-4/)
 * Plugin causes this error to happen:
 * PHP Fatal error: Call to undefined function is_plugin_active() in /var/app/current/
   wp-content/plugins/enhance-wp-rocket-loadcss/wp-rocket-loadcss.php on line 35

Viewing 1 replies (of 1 total)

 *  [stefan344](https://wordpress.org/support/users/stefan344/)
 * (@stefan344)
 * [6 years, 11 months ago](https://wordpress.org/support/topic/call-to-undefined-function-is_plugin_active-4/#post-11727110)
 * I have the same issue. Did you ever find a solution?

Viewing 1 replies (of 1 total)

The topic ‘Call to undefined function is_plugin_active()’ is closed to new replies.

 * ![](https://ps.w.org/enhance-wp-rocket-loadcss/assets/icon-256x256.jpg?rev=1965162)
 * [WP Rocket | Simple LoadCSS Preloader](https://wordpress.org/plugins/enhance-wp-rocket-loadcss/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/enhance-wp-rocket-loadcss/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/enhance-wp-rocket-loadcss/)
 * [Active Topics](https://wordpress.org/support/plugin/enhance-wp-rocket-loadcss/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/enhance-wp-rocket-loadcss/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/enhance-wp-rocket-loadcss/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [stefan344](https://wordpress.org/support/users/stefan344/)
 * Last activity: [6 years, 11 months ago](https://wordpress.org/support/topic/call-to-undefined-function-is_plugin_active-4/#post-11727110)
 * Status: not resolved