Title: PHP errors Last modified: December 2, 2016 --- # PHP errors * [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 6 months ago](https://wordpress.org/support/topic/php-errors-94/) * Hello, I noticed a PHP error when clicking on “about” page inside wp-admin: _ Fatal error: Cannot redeclare \_wp\_menu\_output() (previously declared in wp- admin\menu-header.php:68) in wp-admin\menu-header.php on line 240 * Another error: I have a problem when migrating a website from localhost to live version: all sliders are empty, no images are found and this is the message: * _Warning: Invalid argument supplied for foreach() in wp-content/plugins/rolo- slider/core/shortcode.php on line 127_ Viewing 15 replies - 1 through 15 (of 25 total) 1 [2](https://wordpress.org/support/topic/php-errors-94/page/2/?output_format=md) [→](https://wordpress.org/support/topic/php-errors-94/page/2/?output_format=md) * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 6 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8510212) * Hello again, * Very strange. We couldn’t reproduce this on our side. Error may be related to already sent header information or some other conflict from another plugin. Have you tried to disable all additional plugins to see if there is some conflict. Is it the same setup as on your local installation? * Regarding warning, after importing slider from one installation to another all images were present but of course they were pointing to previous host, bust if you were migrating entire installation they should be there if all URLs are replaced within the database file. Warning is related to the part of file which have to load slider options, and by simply editing and saving slider, warning should dissapear, but again we couldn’t reproduce this on our side. * Please give us some more info if you find out something, so we can fix this if it is something related to the Rolo Slider. * Best Regards! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 6 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8519292) * Hi again, I tried to disable all other plugins and deleted all the content from functions.php theme file but the error is still there. Even updated to 0.41. * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 6 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8526677) * Hi again, * We really tried to reproduce this but without success. Since you are experiencing this on live enviroment can you create admin user for us, and also send us FTP admin user at pressfore[@]gmail.com so we can investigate this on your end. * Best Regards! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 6 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8530250) * Thanks I will create an admin user for you at the begininning of next week. Kind regards 🙂 * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 6 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8531614) * Excellent, * Looking forward to hearing from you on mail 🙂 * Bests! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8567777) * Hello Pressfore, took me longer than expected to give you admin user on a test website. * You should have received an email to pressfore[@]gmail.com. * If you go to Rolo Slider -> About you will see that error: * _Fatal error: Cannot redeclare \_wp\_menu\_output() (previously declared in wp- admin\menu-header.php:68) in wp-admin\menu-header.php on line 242_ * This on a fresh default WordPress install. * Thanks! * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8573652) * Hi again, * Thanks for the credentials, we checked your installation but we couldn’t find anything which may cause this. It is very strange since we cannot mimic this error on our side, so can you also provide us with FTP admin access so we can try few things within the code. You can send them over at pressfore[@]gmail.com * Bests! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8596135) * Hi Pressfore, * I’ve finally had time to look into this issue and therefore created an FTP account for you and sent you an email. * Thanks for your help, best regards! * Baga * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8601741) * Hi Baga, * And thanks for the credentials. * Error which you got on about page is very intriguing. We tried to call about page from several different locations, but every time when visiting about page error is displayed. What is intriguing about this is that **_wp_menu_output() is actually not being called anywhere in the plugin** so we really couldn’t find what may be triggering it. Even when switching to different theme, error was there still, and even reinstalling WordPress from WP admin didn’t fixed this. Unfortunately there is no logical explanation for the issue which you are having here. From my experience I can only guess that something else on your host is causing this, if maybe you have some php script installed, or maybe something which is provided by the host. Suggestion is to try clearing host from unnecessary things and disable server caching and cdn if present. One more thing, in case that you used some auto installer like fantastico, you can try to clear current installation and to re do it manually (host may change some things when providing installation trouh auto installer), but since about page is not crucial theme functionality, it currently contain link to documentation and some features listed [http://screencast.com/t/OljGtf1CF](http://screencast.com/t/OljGtf1CF) , this may be time consuming and it is not worth it. Simply on our local and live testing installations error wasn’t there and everything was running smoothly, so there mus be something very dumb behind this. * Happy Holidays 🙂 * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8602596) * Hi and thanks for getting back. * Yes indeed it is not worth to spend a lot of time on this issue, what is strange is that I have the same error on my local environment. * I will try to install it on another hosting company and see what happens, just a matter of curiosity rather than real need. * What you should try to fix is the loss of slides when migrating a website: this happened to me when migrating from local to live version, and again when migrating from a test URL to the real URL on the same server. * Happy Holidays to you too! * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8616427) * Hello, * Regarding this strange error, we have a guess what maybe can cause this, it is just naming of about page file, which is still very strange. We will try to release a fix very soon and will let you know so you can tell us if it is working. Slider migration issue is indeed important one, and we add it to our list, and will try to reproduce it in fix it also. * Bests! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 5 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8617379) * Thanks for your support! * Plugin Author [pressfore](https://wordpress.org/support/users/pressfore/) * (@pressfore) * [9 years, 3 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8809580) * Hi again, * About page has been fixed and also Demo import along with Import / Export features were added in latest release, so please update Rolo Slider and tell us if everything is working now. * All the Best! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 3 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8813693) * Thank you very much, I will look into it! * Thread Starter [baga](https://wordpress.org/support/users/baga/) * (@baga) * [9 years, 3 months ago](https://wordpress.org/support/topic/php-errors-94/#post-8874424) * Hello, import / export still not working… Viewing 15 replies - 1 through 15 (of 25 total) 1 [2](https://wordpress.org/support/topic/php-errors-94/page/2/?output_format=md) [→](https://wordpress.org/support/topic/php-errors-94/page/2/?output_format=md) The topic ‘PHP errors’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/rolo-slider_7e7473.svg) * [Rolo Slider](https://wordpress.org/plugins/rolo-slider/) * [Frequently Asked Questions](https://wordpress.org/plugins/rolo-slider/#faq) * [Support Threads](https://wordpress.org/support/plugin/rolo-slider/) * [Active Topics](https://wordpress.org/support/plugin/rolo-slider/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/rolo-slider/unresolved/) * [Reviews](https://wordpress.org/support/plugin/rolo-slider/reviews/) * 25 replies * 2 participants * Last reply from: [baga](https://wordpress.org/support/users/baga/) * Last activity: [9 years, 2 months ago](https://wordpress.org/support/topic/php-errors-94/page/2/#post-8929267) * Status: not resolved