Title: PHP warning when editing registration form Last modified: July 11, 2026 --- # PHP warning when editing registration form * Resolved [Daniel Fuchs](https://wordpress.org/support/users/dfuchs72/) * (@dfuchs72) * [3 days, 21 hours ago](https://wordpress.org/support/topic/php-warning-when-editing-registration-form/) * I don’t know if this is Event-Genius-related, but when I edit the registration form in the backend with WP_DEBUG switched on, I get seven PHP warnings “Array to string conversion in […]/wp-includes/class-wp-editor.php on line 851” at the bottom of the page (as soon as I switch to the ‘Registration Form’ tab). It doesn’t seem to impede the function, editing works fine. I just wanted to tell you because it struck my eye. * ``` ## Site/Server Info ## WordPress Version: 7.0.1 PHP Version: 8.4.16-nmm1 Server Software: Apache MySQL Version: 10.11.14 Active Theme: Alnus Site URL: https://alnus.pro-waldstadt.de Multisite: No ## Active Plugins ## Antispam Bee: 2.11.12 Enable Media Replace: 4.2.2 Event Genius: 1.15 FileBird Lite: 6.5.5 Image Widget: 4.4.12 Lightbox mit PhotoSwipe: 5.8.6 Loco Translate: 2.8.5 No Gutenberg - Disable Blocks Editor and Global Styles - Back to Classic Editor: 2.1.2 Regenerate Thumbnails Advanced: 2.5.0 Resize Image After Upload: 1.8.6 YYDevelopment - Show Pages ID: 1.5.6 WordPress Importer: 0.9.5 ## Event Information ## Next Event: No upcoming events scheduled Total Events: 2 Total Registrations: 0 ## Settings ## preserve_data: enabled start_of_the_week: monday full_date_format: custom full_date_format_custom: l, j. F Y date_summary_format: custom date_summary_format_custom: d.m.Y registration_timeline_format: custom registration_timeline_format_custom: d.m.Y, H:i time_format: H:i time_format_custom: ga cpt_slugs: Array ( [event_slug] => termin [event_archive_slug] => events [venue_slug] => ort [venue_archive_slug] => venues [organizer_slug] => organizer [organizer_archive_slug] => organizers [event_category_slug] => event-category [event_tag_slug] => event-tag ) email_from_address_custom: disabled email_from_address: Valid email address | Domain does not match site domain google_maps_api_key: Malus31.12. event_template: custom show_export_options: enabled single_event_elements: Array ( [0] => title [1] => featured_image [2] => date [3] => locations [4] => map [5] => about_details [6] => organizers [7] => categories [8] => tags [9] => capacity ) color_theme: light currency_symbol: $ cost_display: {symbol}{amount} enable_dynamic_content_refresh: enabled dynamic_content_staleness_threshold: 3 show_events_in_main_loop: disabled default_calendar_settings: {"view":"month","num":12,"events_per_day":3,"filter_relationship":"AND","show_toolbar":"disabled","show_pagination":"disabled","filter_bar_options":{"search":true,"venue":true,"category":false,"tag":false,"time_filter":true,"list_sort":false,"display":true},"filters":[],"color":"#7a944d","default_time_filter":"upcoming","default_list_sort_order":""} ## Debug Log ## Log Entries: No log entries found. ## Cron Events ## evge_cleanup_orphaned_records: Next Run: 2026-07-11 19:31:11 Hours Until: 11.6 hours Schedule: twicedaily ``` Viewing 4 replies - 1 through 4 (of 4 total) * Plugin Support [Craig Schlegel](https://wordpress.org/support/users/craigmschlegel/) * (@craigmschlegel) * [3 days, 18 hours ago](https://wordpress.org/support/topic/php-warning-when-editing-registration-form/#post-18962465) * Hmm yes this is worth some investigation. I’ll take a look and will get back to you. * Thread Starter [Daniel Fuchs](https://wordpress.org/support/users/dfuchs72/) * (@dfuchs72) * [3 days, 11 hours ago](https://wordpress.org/support/topic/php-warning-when-editing-registration-form/#post-18962627) * I’ve just seen the very same error message at the bottom of the normal page editor. Seems to be a WordPress problem. * Plugin Support [Craig Schlegel](https://wordpress.org/support/users/craigmschlegel/) * (@craigmschlegel) * [1 day, 14 hours ago](https://wordpress.org/support/topic/php-warning-when-editing-registration-form/#post-18963951) * That could be the case. Does it persist if you disable all plugins and switch themes? That could let you know what the source is. I’ll mark this as resolved but let me know if you still suspect Event Genius is the cause. * Thread Starter [Daniel Fuchs](https://wordpress.org/support/users/dfuchs72/) * (@dfuchs72) * [1 day, 14 hours ago](https://wordpress.org/support/topic/php-warning-when-editing-registration-form/#post-18963993) * You’re right, it was in my theme, more specifically in my passing of parameters to TinyMCE in the ‘tiny_mce_before_init’ filter. Sorry for the fuss. Viewing 4 replies - 1 through 4 (of 4 total) You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-warning-when-editing-registration-form%2F%3Foutput_format%3Dmd&locale=en_US) to reply to this topic. * ![](https://ps.w.org/event-genius/assets/icon-256x256.png?rev=3486809) * [Event Genius - Event Management, Events Calendar, Registration, and RSVP](https://wordpress.org/plugins/event-genius/) * [Frequently Asked Questions](https://wordpress.org/plugins/event-genius/#faq) * [Support Threads](https://wordpress.org/support/plugin/event-genius/) * [Active Topics](https://wordpress.org/support/plugin/event-genius/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/event-genius/unresolved/) * [Reviews](https://wordpress.org/support/plugin/event-genius/reviews/) * 4 replies * 2 participants * Last reply from: [Daniel Fuchs](https://wordpress.org/support/users/dfuchs72/) * Last activity: [1 day, 14 hours ago](https://wordpress.org/support/topic/php-warning-when-editing-registration-form/#post-18963993) * Status: resolved