How does XAMPP affect the ability to set chmod permissions in PHP?

XAMPP may affect the ability to set chmod permissions in PHP due to its default configurations and restrictions on file permissions. To solve this issue, you can use the `chmod` function in PHP to set permissions on files or directories. Make sure that the XAMPP server has the necessary permissions to modify files in the specified directory.

$filename = 'example.txt';
$permissions = 0644; // Set the desired permissions here

if (file_exists($filename)) {
    chmod($filename, $permissions);
    echo "Permissions set successfully.";
} else {
    echo "File does not exist.";
}