What does the "SAFE MODE Restriction in effect" error message in PHP mean?

The "SAFE MODE Restriction in effect" error message in PHP means that the server's safe mode feature is enabled, which restricts certain actions such as accessing files outside the document root. To solve this issue, you can modify your PHP code to work within the constraints of safe mode or disable safe mode if possible.

// Example of disabling safe mode in PHP
ini_set('safe_mode', 0);