Title: Fatal PHP error on activation due to duplicate function names Last modified: August 21, 2016 --- # Fatal PHP error on activation due to duplicate function names * Resolved [David Anderson / Team Updraft](https://wordpress.org/support/users/davidanderson/) * (@davidanderson) * [12 years, 3 months ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/) * Hi, * This looks a useful plugin for programmers to build upon. Thank you! I was beginning to use it to build a country selector within another plugin. * However, on the site I want to deploy upon, another plugin already has the same GeoIP library included. This causes a fatal error, as your library does not apply checks for whether the library is already loaded (the other plugin does – but unfortunately the other plugin can get loaded first). * i.e. To make your plugin play nice with other plugins, you need to add various wrappers like: * > if(!class_exists(‘geoiprecord’)) { > class geoiprecord { // (Previous contents > of geoiprecord class) } } * Alternatively, if you are happy to be PHP 5.3 only, then use name-spacing. * Even better: update from the legacy PHP API to the current one: [https://github.com/maxmind/GeoIP2-php](https://github.com/maxmind/GeoIP2-php) * Best wishes, David * [https://wordpress.org/plugins/geoip-detect/](https://wordpress.org/plugins/geoip-detect/) Viewing 6 replies - 1 through 6 (of 6 total) * Thread Starter [David Anderson / Team Updraft](https://wordpress.org/support/users/davidanderson/) * (@davidanderson) * [12 years, 3 months ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638581) * Hi, * I’ve created for you a patched version of this plugin with 3 improvements… get it here: [http://david.dw-perspective.org.uk/tmp/geoip-detect.1.5.1.zip](http://david.dw-perspective.org.uk/tmp/geoip-detect.1.5.1.zip) * You are welcome to release this patched version as your next version. * The 3 improvements are as follows: * * FIX: Does not cause fatal errors if another plugin has already loaded the GeoIP library (checks function + class existence first) * * FIX: Prevent PHP notice when looking up IPs with no region entry in GeoIP database * * FIX: Remove duplicate copy of GeoIP library (your plugin had 2 copies in, and only one was used) and other unused testing scripts from the GeoIP library * This is still using the old PHP API. I am in a hurry so just wanted to get something working quickly! * Best wishes, David * Plugin Author [Benjamin Pick](https://wordpress.org/support/users/benjaminpick/) * (@benjaminpick) * [12 years, 3 months ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638824) * Many thanks for taking the pain and even proposing a patch! I will have a look at it and adapt it in a way that I don’t need to modify the Maxmind files. * Yes I agree the APIv2 would be great but AFAIK it is still in beta. Definitely something I consider for the long-term. However we will have to see how to keep backwards compatibility, I don’t want to include both libraries yet existing code should continue working. * Thread Starter [David Anderson / Team Updraft](https://wordpress.org/support/users/davidanderson/) * (@davidanderson) * [12 years, 3 months ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638825) * Hi Benjamin, * Thanks for getting back. * It looked to me like APIv2 is no longer in beta – the github page says that v1 is “legacy”, and I can’t see any indications for v2 of not being current. * Based on that, I wouldn’t worry about modifying the MaxMind libraries, as they’re not likely to be further developed. There shouldn’t be future changes to include. Actually the versions I put into yours were a fork maintained by Diego Zanella for one of his plugins ([http://dev.pathtoenlightenment.net/shop/currency-switcher-woocommerce/](http://dev.pathtoenlightenment.net/shop/currency-switcher-woocommerce/)), so you shouldn’t have any maintenance work. (And if you did, it should be minimal, presuming that you’re planning to switch from the legacy library anyway). * David * Plugin Author [Benjamin Pick](https://wordpress.org/support/users/benjaminpick/) * (@benjaminpick) * [12 years ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638912) * class_exists()-Wrappers will be include in the about-to-be-released Version 1.6 * Thread Starter [David Anderson / Team Updraft](https://wordpress.org/support/users/davidanderson/) * (@davidanderson) * [12 years ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638913) * Hi, * Thanks – did you include any of the other 2 fixes (mentioned in my second post in this thread) in that release? * David * Plugin Author [Benjamin Pick](https://wordpress.org/support/users/benjaminpick/) * (@benjaminpick) * [12 years ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638914) * Yes I did include other minor fixes from your version while not modifying the vendor-Library. Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Fatal PHP error on activation due to duplicate function names’ is closed to new replies. * ![](https://ps.w.org/geoip-detect/assets/icon-256x256.jpg?rev=978998) * [Geolocation IP Detection](https://wordpress.org/plugins/geoip-detect/) * [Frequently Asked Questions](https://wordpress.org/plugins/geoip-detect/#faq) * [Support Threads](https://wordpress.org/support/plugin/geoip-detect/) * [Active Topics](https://wordpress.org/support/plugin/geoip-detect/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/geoip-detect/unresolved/) * [Reviews](https://wordpress.org/support/plugin/geoip-detect/reviews/) * 6 replies * 2 participants * Last reply from: [Benjamin Pick](https://wordpress.org/support/users/benjaminpick/) * Last activity: [12 years ago](https://wordpress.org/support/topic/fatal-php-error-on-activation-due-to-duplicate-function-names/#post-4638914) * Status: resolved