PHP Warning: is_dir() open_basedir restriction in class-tracking.php (Line 1124)

Hi Burst Statistics Team,

I am currently experiencing an issue where your plugin is generating a lot of PHP warnings in my server’s error log. It seems the plugin is trying to check the default PHP session directory (/var/lib/php/sessions), which falls outside the allowed open_basedir paths on my hosting environment.

While this doesn’t crash the website, it spams the error logs heavily on every tracking request made to endpoint.php.

Here is the exact error log snippet:

[error] 58043#58043: *696815 FastCGI sent in stderr: "PHP message: PHP Warning: is_dir(): open_basedir restriction in effect. File(/var/lib/php/sessions) is not within the allowed path(s): (/www/example_547/public:/www/example_547/mysqleditor:/www/example_547/web:/www/example_547/deploy:/www/example_547/deployment:/www/example_547/deployments:/www/example_547/tmp:/usr/share:/tmp:/dev/urandom) in /www/example_547/public/wp-content/plugins/burst-statistics/includes/Frontend/Tracking/class-tracking.php on line 1124" while reading response header from upstream, client: 131.117.154.132, server: example.de, request: "POST /wp-content/plugins/burst-statistics/endpoint.php HTTP/2.0", upstream: "fastcgi://unix:/var/run/php8.3-fpm-example.sock:", host: "example.de:65124", referrer: "https://example.de/depot/"

Environment details:

• PHP Version: 8.3 (FPM)
• Trigger: POST requests to /wp-content/plugins/burst-statistics/endpoint.php
• File: /includes/Frontend/Tracking/class-tracking.php on line 1124

Suggestion: Could you please look into handling this more gracefully for environments with strict open_basedir restrictions? If it’s just a fallback check, perhaps silencing it via @is_dir() or checking the actual session_save_path() could prevent the logs from filling up unnecessarily.

Thank you for your help and for the great plugin!

Best regards,
Julian