Why is it important to consider security measures, such as "register globals," when writing PHP scripts that involve file operations?

When writing PHP scripts that involve file operations, it is important to consider security measures such as disabling "register globals" to prevent security vulnerabilities like injection attacks. This setting allows user input to overwrite global variables, potentially leading to unintended consequences or malicious code execution. By turning off "register globals," you can ensure that variables are properly sanitized and validated before being used in file operations.

// Disable register globals
ini_set('register_globals', 0);