Title: wp-cache-config.php file getting Corrupted Last modified: September 21, 2017 --- # wp-cache-config.php file getting Corrupted * Resolved [ofTherapistSummers](https://wordpress.org/support/users/samisummerstssp/) * (@samisummerstssp) * [8 years, 8 months ago](https://wordpress.org/support/topic/wp-cache-config-php-file-getting-corrupted/) * Recently (starting on the 4th of this month from what I can see), the …/wp-content/ wp-cache-config.php file has been becoming corrupted every few days (virtually at random from what I can see). This issue has not happened in the past and I’ve had the WP Super Cache plugin installed and active for almost 2 years. * What I am seeing are parts of the coding in the file being replaced with: * `���������������������������������������������������������������������������� ����������������������������������������������������������������������������� ����������������������������������������������������������������������������� ����������������������������������������������������������������������������� ������������������������������������������������������������������������$wp_` * Depending on where the corruption occurs in the file it can cause certain parts of the site to not work, or, at times, it can cause every page to throw a 500 error. * The error shown in my PHP Error Log is usually a Syntax Error due to these unexpected strings of REPLACEMENT CHARACTERS. This is only happening to this one file as far as I can tell. * I have not installed any new plugins, nor have I made changes to the WP Super Cache settings. * When the error arises, I remove the corrupted code, clear the cache from the dashboard, and then everything works fine again for a day or so (sometimes it is several days until it happens again) and then the corruption happens all over again (usually in a different part of the file, sometimes affecting 2 areas of the file and with different numbers of the REPLACEMENT CHARACTER). * What could be causing this issue? * Thank you in advance. Viewing 11 replies - 1 through 11 (of 11 total) * [Saša](https://wordpress.org/support/users/stodorovic/) * (@stodorovic) * [8 years, 8 months ago](https://wordpress.org/support/topic/wp-cache-config-php-file-getting-corrupted/#post-9518535) * Hi [@samisummerstssp](https://wordpress.org/support/users/samisummerstssp/) * There are a lot of similar issues, but I can’t reproduce it. I’m guessing that’s trouble with these lines in function `wp_cache_replace_line`: * ``` $lines = file($my_file); foreach( (array)$lines as $line ) { ``` * Problem could be when file returns false. I’ll try to replace this block with: * ``` $lines = file($my_file); if ( empty( $lines ) || !is_array( $lines ) ) { return false; } foreach( (array)$lines as $line ) { ``` * I don’t see anything else for now. Please try this code and I’ll create issue on github if we find out more details. It’s possible to we add code for logging result of function `file` in debug.log if you want. * Regards, Sasa * Thread Starter [ofTherapistSummers](https://wordpress.org/support/users/samisummerstssp/) * (@samisummerstssp) * [8 years, 8 months ago](https://wordpress.org/support/topic/wp-cache-config-php-file-getting-corrupted/#post-9518559) * Thank you for the swift reply. I have a stupid question though… Which file is the function located in that you wanted me to change? * EDIT:: Forget my question. I found the code you were speaking of. I will swap out the code for the one you suggested and see if the issue happens again. Thank you again! - This reply was modified 8 years, 8 months ago by [ofTherapistSummers](https://wordpress.org/support/users/samisummerstssp/). * [Saša](https://wordpress.org/support/users/stodorovic/) * (@stodorovic) * [8 years, 8 months ago](https://wordpress.org/support/topic/wp-cache-config-php-file-getting-corrupted/#post-9518606) * Sorry, I forgot to write it. It’s [wp-cache.php](https://github.com/Automattic/wp-super-cache/blob/master/wp-cache.php#L2199-L2241) in /wp-content/plugins/wp-super-cache * If you want, you can set DEBUG mode (with logging into file) – [https://codex.wordpress.org/WP_DEBUG](https://codex.wordpress.org/WP_DEBUG): * ``` define('WP_DEBUG', true); define('WP_DEBUG_DISPLAY', false); define('WP_DEBUG_LOG', true); ``` * I’ll try to write additional PHP snippet which will log changes for wp-cache- config.php. Maybe we can find root of cause on this way. * [lbracci](https://wordpress.org/support/users/lbracci/) * (@lbracci) * [8 years, 8 months ago](https://wordpress.org/support/topic/wp-cache-config-php-file-getting-corrupted/#post-9522622) * I want to report the same problem. In the Dashboard, Wp-Super-Cache gives an error message about an erroneus value (/) for the $cache_path variable, and the plugin is shown as disabled. When I checked the wp-cache-config.php file, this was their partial content: * ``` $super_cache_enabled = true; //Added by WP-Cache Manager $wp_cache_mobile_groups = ''; //Added by WP-Cache Manager $wp_cache_home_path = '/'; //Added by WP-Cache Manager ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@$ // Disable the file locking system. // If you are experiencing problems with clearing or creating cache files // uncommenting this may help. $wp_cache_mutex_disabled = 1; //Added by WP-Cache Manager ``` * As you can see, the null characters overwrote $cache_path and other variables, causing the error messages. I uninstalled and reinstalled the plugin, but the problem keeps happening approximately every two days. * Temporary I’ve chmoed the wp-cache-config.php file, making it read-only. - This reply was modified 8 years, 8 months ago by [lbracci](https://wordpress.org/support/users/lbracci/). - This reply was modified 8 years, 8 months ago by [lbracci](https://wordpress.org/support/users/lbracci/). * [davidtrebacz](https://wordpress.org/support/users/davidtrebacz/) * (@davidtrebacz) * [8 years, 8 months ago](https://wordpress.org/support/topic/wp-cache-config-php-file-getting-corrupted/#post-9541091) * I experienced corruption twice since the update. Site is stable then all of a sudden wp-cache-config.php becomes corrupt and breaks the entire site. In my case the corruption is the first few characters are replaced “