Title: PHP warning when creating empty group Last modified: August 22, 2016 --- # PHP warning when creating empty group * Resolved [Sciscitator](https://wordpress.org/support/users/sciscitator/) * (@sciscitator) * [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/) * Thanks for this great plugin. * I just like to indicate that the plugin throws an unpretty PHP warning when creating a group with no content: * Warning: Cannot modify header information – headers already sent by (output started at /Users/kraharvahar/Development/projects/migracom/wp/wp-includes/l10n.php:203) in /Users/kraharvahar/Development/projects/migracom/content/plugins/content-aware- sidebars/content-aware-sidebars.php on line 1097 * [https://wordpress.org/plugins/content-aware-sidebars/](https://wordpress.org/plugins/content-aware-sidebars/) Viewing 5 replies - 1 through 5 (of 5 total) * Plugin Author [Joachim Jensen](https://wordpress.org/support/users/intoxstudio/) * (@intoxstudio) * [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/#post-5442972) * Thanks for your kind words. * Where is the error message displayed on the screen? And does it show up when clicking “Add New Group” or when saving a new, empty group? * Thread Starter [Sciscitator](https://wordpress.org/support/users/sciscitator/) * (@sciscitator) * [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/#post-5442976) * Hey Joachim, * thanks for your answer. * I can reproduce the warning by doing the following steps: 1) Clicking on “Add New Group” / “Erstelle neue Gruppe” 2) Clicking on “Save” / “Sichern” without adding any Content to the group * The warning displays inside the popup after the message “Die Gruppe darf nicht leer sein” (“The group must not be empty”). * Here’s the call stack: # Time Memory Function Location 1 0.0008 263264 {main}()../ admin-ajax.php:0 2 0.7258 37351376 do_action( ) ../admin-ajax.php:85 3 0.7259 37352896 call_user_func_array: …/wp-includes/plugin.php:505} ( ) ../plugin.php: 505 4 0.7259 37352976 ContentAwareSidebars->add_sidebar_rule_ajax( ) ../plugin. php:505 5 0.7262 37362488 header ( ) ../content-aware-sidebars.php:1097 * Kind regards * Plugin Author [Joachim Jensen](https://wordpress.org/support/users/intoxstudio/) * (@intoxstudio) * [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/#post-5442979) * Thank you. I can see how the error could be triggered, but I can simply not reproduce it. * What version of PHP are you using? Are there any text or whitespaces just before or just after “Die Gruppe darf nicht leer sein” (except the error message)? * Thread Starter [Sciscitator](https://wordpress.org/support/users/sciscitator/) * (@sciscitator) * [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/#post-5443081) * Hey Joachim, * sorry for the late answer. I’m currently on a world trip and don’t have internet connection every day. * I tried with PHP 5.3-5.5, no whitespaces before or after. * But anyway I just updated to the new version and see that the error has fixed! Big thanks! 🙂 * I just got another minor thing: If I add something to a group and click “Save”( or “Sichern” in german) I would expect that the current state goes back to “Edit/ Delete” (or “Bearbeiten/Löschen” in german). This is not the case. I have to explicitly click “Cancel” to get back to the “Edit/Delete” view. Not a big thing but still a small usability flaw imho. * Keep up the good work! Henrik * Plugin Author [Joachim Jensen](https://wordpress.org/support/users/intoxstudio/) * (@intoxstudio) * [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/#post-5443085) * Sounds great! And thank you for your feedback about the Save UX, I think you are right that one would expect the state to go from “active” to “inactive” when saving. * My reasoning behind not doing it that way was that a user might want to save a group several times when working on it, e.g. to make sure he would not lose any data if the browser crashed, connection disappeared etc. Therefore, I decided, the user should explicitly make the group “inactive” when he is done working on it. * Clicking on “Add New Group” will also make the current group “inactive”. Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘PHP warning when creating empty group’ is closed to new replies. * ![](https://ps.w.org/content-aware-sidebars/assets/icon-256x256.png?rev=1815877) * [Content Aware Sidebars - Fastest Widget Area Plugin](https://wordpress.org/plugins/content-aware-sidebars/) * [Frequently Asked Questions](https://wordpress.org/plugins/content-aware-sidebars/#faq) * [Support Threads](https://wordpress.org/support/plugin/content-aware-sidebars/) * [Active Topics](https://wordpress.org/support/plugin/content-aware-sidebars/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/content-aware-sidebars/unresolved/) * [Reviews](https://wordpress.org/support/plugin/content-aware-sidebars/reviews/) * 5 replies * 2 participants * Last reply from: [Joachim Jensen](https://wordpress.org/support/users/intoxstudio/) * Last activity: [11 years, 6 months ago](https://wordpress.org/support/topic/php-warning-when-creating-empty-group/#post-5443085) * Status: resolved