How can file permissions, such as chmod settings, impact PHP scripts and lead to access issues?

File permissions, such as chmod settings, can impact PHP scripts by restricting or allowing access to certain files and directories. If the permissions are too restrictive, PHP scripts may not be able to read or write to necessary files, leading to errors or functionality issues. To solve this, you can adjust the file permissions using the chmod command to ensure that the PHP scripts have the necessary access.

// Adjust file permissions to allow PHP scripts to read and write
chmod("path/to/file.txt", 0644);