Translations:Optional settings/91/en
From LimeSurvey Manual
The runtime path must be a readable and writable directory for the “web user”. However, the runtime path contains files with potential security information that are located in the public web access area. LimeSurvey collects these files in the temp directory of the LimeSurvey root directory. In order to eliminate the access to such important data, you can set the runtime path outside the public web access by editing the respective lines in the /application/config/config.php file: