Title: Do not cache elements Last modified: August 21, 2016 --- # Do not cache elements * [weboperations](https://wordpress.org/support/users/weboperations/) * (@weboperations) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/) * I see the “DO NOT CACHE PAGE”secret code. * I built a cache to serve my sidebar content to a “quick-connect app” that I created for mobile clients. * You can see the app at [http://spartabands.org/app](http://spartabands.org/app) * You will need to shrink down the app to allow for the javascript to redesign the layout and function to a smartphone. * I am getting the following message now under my “Coming Events” panel in the smartphone version of the page. * “Warning: Cannot modify header information – headers already sent by (output started at /home/spartaba/public_html/app/index.php:5) in /home/spartaba/public_html/ wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 89” * I need to understand where I need to install and how to execute the do not cache this page in regards to the error. * Many thanks for your time. * [http://wordpress.org/plugins/wp-super-cache/](http://wordpress.org/plugins/wp-super-cache/) Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/) * (@donncha) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4251999) * add this at the top of your app/index.php: * `define( 'DONOTCACHEPAGE', 1 );` * That’s all you need to stop caching. * Thread Starter [weboperations](https://wordpress.org/support/users/weboperations/) * (@weboperations) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4252011) * so you are saying * or am I missing something? * Thread Starter [weboperations](https://wordpress.org/support/users/weboperations/) * (@weboperations) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4252012) * it still has the error. * Thread Starter [weboperations](https://wordpress.org/support/users/weboperations/) * (@weboperations) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4252017) * The content of the panel comes from * * Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/) * (@donncha) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4252108) * Define DONOTCACHEHOME before your load wp-load.php and see if that helps? * Are you sure there’s not an empty space before the opening PHP tag? * Thread Starter [weboperations](https://wordpress.org/support/users/weboperations/) * (@weboperations) * [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4252113) * Positive- * * from line 1. * I am wondering if it is a functional issue. I use the following code in the function.php file to cache the sidebar to a text file that is refreshed by a timed expire. Perhaps I need to rename a variable? * // add sidebar function * function cache($task, $cacheFile, $cacheTime = 600){ global $cache; * // Configure files and directories: $cacheDir = TEMPLATEPATH.”/cache”; $cacheFileName = $cacheDir.”/cache-$cacheFile.txt”; $cacheLogFile = $cacheDir.”/cache-log.txt”; * // Make cache directory if it doesn’t exist if(!is_dir($cacheDir)) mkdir($cacheDir, 0755); * // Make a log of the cache files with their current status if(file_exists($ cacheLogFile)) $cacheLog = unserialize(file_get_contents($cacheLogFile)); else $cacheLog = array(); * if($task == ‘start’){ // If cache exists, is less than 6 hours old and is not in deletion queue, keep it – otherwise rebuild cache if(file_exists($cacheFileName)&&( time() – filemtime($cacheFileName)) < $cacheTime && $cacheLog[$cacheFile] == 1){ $cache = false; } else { $cache = true; ob_start(); } }elseif($task == ‘end’&& $cache){ // If caching, save file contents and update log file_put_contents($ cacheFileName,ob_get_contents()); ob_end_flush(); $cacheLog[$cacheFile] = 1; file_put_contents($cacheLogFile,serialize($cacheLog)); }elseif($task == ‘purge’){// Set cache to delete and update log $cacheLog[$cacheFile] = 0; file_put_contents( $cacheLogFile,serialize($cacheLog)); } * } function cache_purge(){ $cacheDir = TEMPLATEPATH.”/cache”; $cacheLogFile = $cacheDir.”/cache-log.txt”; if(file_exists($cacheLogFile)) $cacheLog = unserialize( file_get_contents($cacheLogFile)); else $cacheLog = array(); foreach($cacheLog as $key=>$value) $cacheLog[$key] = 0; file_put_contents($cacheLogFile,serialize( $cacheLog)); add_action(‘switch_theme’,’cache_purge’, 10); add_action(‘publish_post’,’ cache_purge’, 10); add_filter(‘widget_update_callback’,’cache_purge’, 10); } * This is the file that the cache is pulled from called sidebar-right.php * *

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* It simply creates a text cache that I use to clone the calendar into the quick access app that I created in bootstrap 3.0 . Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Do not cache elements’ is closed to new replies. * ![](https://ps.w.org/wp-super-cache/assets/icon-256x256.png?rev=3506220) * [WP Super Cache](https://wordpress.org/plugins/wp-super-cache/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-super-cache/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-super-cache/) * [Active Topics](https://wordpress.org/support/plugin/wp-super-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-super-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-super-cache/reviews/) ## Tags * [Custom Coding](https://wordpress.org/support/topic-tag/custom-coding/) * 6 replies * 2 participants * Last reply from: [weboperations](https://wordpress.org/support/users/weboperations/) * Last activity: [12 years, 7 months ago](https://wordpress.org/support/topic/do-not-cache-elements/#post-4252113) * Status: not resolved