Title: wrong installation Last modified: August 22, 2016 --- # wrong installation * Resolved [suriel33](https://wordpress.org/support/users/suriel33/) * (@suriel33) * [11 years, 4 months ago](https://wordpress.org/support/topic/wrong-installation/) * I installed jomres in Worpress 4.1, but when entering some features in Worpress throws me: Fatal error: “Internal Error Zend – Missing class for information in /home/drivemc/public_html/testo/wp-content/plugins/jomres/jomres.php on line 18 “and install it several times but the result is the same * [https://wordpress.org/plugins/jomres/](https://wordpress.org/plugins/jomres/) Viewing 9 replies - 1 through 9 (of 9 total) * Plugin Author [jomres](https://wordpress.org/support/users/jomres/) * (@jomres) * [11 years, 4 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693644) * I Googled this error, and found these pages : * [https://wordpress.org/support/topic/plugin-wp-super-cache-error-zend-on-gandi-hosting?replies=4](https://wordpress.org/support/topic/plugin-wp-super-cache-error-zend-on-gandi-hosting?replies=4) [https://wordpress.org/support/topic/supercache-internal-zend-error-wtf?replies=5](https://wordpress.org/support/topic/supercache-internal-zend-error-wtf?replies=5) [https://wordpress.org/support/topic/fatal-error-internal-zend-error-2?replies=5](https://wordpress.org/support/topic/fatal-error-internal-zend-error-2?replies=5) [http://club.orbisius.com/tutorial/wp-super-cache-fatal-error/](http://club.orbisius.com/tutorial/wp-super-cache-fatal-error/) * [https://bugs.php.net/bug.php?id=59298](https://bugs.php.net/bug.php?id=59298) * Can you ask your hosts how you can disable APC (it’s a caching/accelerator service)? * [zigojacko](https://wordpress.org/support/users/zigojacko/) * (@zigojacko) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693924) * One of your customers should not have to disable the caching system they use to accommodate your plugin. You should ensure your plugin works with server-side caching enabled. * Plugin Author [jomres](https://wordpress.org/support/users/jomres/) * (@jomres) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693925) * It has absolutely nothing to do with Jomres, if you’ll read those links. * [zigojacko](https://wordpress.org/support/users/zigojacko/) * (@zigojacko) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693926) * Err. It clearly is because the missing class references a file in your plugin. If they hadn’t have installed your plugin, they wouldn’t have received the error. Sure, it may not be an error in your plugin but it’s a compatibility issue you should resolve – instead, you’ve advised them to disable server-side caching which should never be a solution. * Plugin Author [jomres](https://wordpress.org/support/users/jomres/) * (@jomres) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693927) * Please read the php.net bug report. In our code we do * if ( ! class_exists( ‘wp_jomres’ ) ) { class wp_jomres * Which is perfectly valid in regard to checking to see if a class already exists. * I searched again to ensure that I didn’t miss anything last time around, and it’s certainly seems to be an issue with how WP includes files (in fact, it seems to be a uniquely WP issue) and almost unanimously the fix is to disable APC caching. * The other possible solution is to remove the “if ( ! class_exists( ‘wp_jomres’))” that wraps the class, however this will impact many more users depending on their CSS version and what there error reporting is set to (potentially) so on balance it seems sensible to keep it in place. Anybody who then receives this error in future can TRY to remove the inclusion wrapping, or disable APC. * Plugin Author [jomres](https://wordpress.org/support/users/jomres/) * (@jomres) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693928) * *and what their* * Schoolboy typo. * [zigojacko](https://wordpress.org/support/users/zigojacko/) * (@zigojacko) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693929) * Ah, yes my apologies, it is indeed apparently a bug in the PHP version (I didn’t previously check or look into it). Perhaps a better solution would be to upgrade PHP to 5.4+ rather than to disable APC caching 🙂 * Plugin Author [jomres](https://wordpress.org/support/users/jomres/) * (@jomres) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693930) * Ideally, people will be using PHP 5.5 as 5.4 is almost EOL now but we both know that’s not going to happen for the majority of users 😀 * [zigojacko](https://wordpress.org/support/users/zigojacko/) * (@zigojacko) * [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693931) * Of course 🙂 Viewing 9 replies - 1 through 9 (of 9 total) The topic ‘wrong installation’ is closed to new replies. * ![](https://ps.w.org/jomres/assets/icon-128x128.png?rev=1265618) * [Jomres Hotel Booking Engine for WordPress](https://wordpress.org/plugins/jomres/) * [Frequently Asked Questions](https://wordpress.org/plugins/jomres/#faq) * [Support Threads](https://wordpress.org/support/plugin/jomres/) * [Active Topics](https://wordpress.org/support/plugin/jomres/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/jomres/unresolved/) * [Reviews](https://wordpress.org/support/plugin/jomres/reviews/) ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 9 replies * 3 participants * Last reply from: [zigojacko](https://wordpress.org/support/users/zigojacko/) * Last activity: [11 years, 2 months ago](https://wordpress.org/support/topic/wrong-installation/#post-5693931) * Status: resolved