How can file permissions impact PHP scripts and lead to errors like "File does not exist"?

File permissions can impact PHP scripts by restricting the ability of the script to access or modify files on the server. If a PHP script tries to access a file that it does not have permission to read or write to, it can result in errors like "File does not exist". To solve this issue, you need to ensure that the file permissions are set correctly to allow the PHP script to access the necessary files.

// Set the correct file permissions to ensure the PHP script can access the file
chmod("path/to/file.txt", 0644);