Why is my PHP session_start() failing with \'Failed to write session data (files)\' even though my /tmp folder has 777 permissions?

Troubleshooting Permission Errors with session_start()

When encountering a PHP error indicating "Failed to write session data (files)" during a call to session_start(), it's likely caused by a permission issue. Despite setting the permissions of the /tmp folder to 777, this error persists, suggesting a different underlying cause.

Solution:

To resolve this error, consider the following actions:

1. Change Session Save Path:
   PHP uses a temporary directory to store session data by default (/tmp). If the /tmp folder encounters permission problems, try changing the session save path to a directory where you have write permissions. Use the session_save_path() function to set a new path.
2. Contact Server Administrator:
   If you're unable to change the session save path or if the problem persists, it's possible that there's an issue with the server's /tmp folder. Contact your server administrator and inform them about the situation. They may be able to investigate and resolve the underlying issue that's causing the permission error.

Additional Information:

For more details on setting the session save path, refer to the PHP documentation: http://php.net/manual/en/function.session-save-path.php

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