Problem
The following error appears when you click Test Connection at Configuration () > System Settings > Database Backups:
(S)FTP: Unable to open for writing
Cause
This error indicates that WHMCS cannot open a test file in the PHP system directory (the sys_temp_dir
PHP setting) via the PHP fopen
function.
Solution
Make certain that:
- The
php.ini
file includes a validsys_temp_dir
value. - The PHP system temporary directory has writeable permissions.
- The
fopen
function is not disabled in the PHP configuration.
Last modified: October 30, 2024