What best practices should be followed when troubleshooting PHP errors related to file permissions?

When troubleshooting PHP errors related to file permissions, it is important to ensure that the files and directories have the correct permissions set. This typically involves granting the appropriate read, write, and execute permissions to the web server user. Additionally, it is important to check for any SELinux or AppArmor restrictions that may be causing issues with file access.

// Example code snippet to set file permissions
chmod("/path/to/file", 0644); // Set read and write permissions for owner, read permissions for group and others