How can PHP developers implement error handling or validation to prevent accidental file deletions or mismatches in file paths when using unlink() function?

To prevent accidental file deletions or mismatches in file paths when using the unlink() function, PHP developers can implement error handling and validation by checking if the file exists before attempting to delete it. This can help prevent errors such as trying to delete a non-existent file or deleting a file with a different path than intended.

$file_path = "/path/to/file.txt";

if (file_exists($file_path)) {
    if (unlink($file_path)) {
        echo "File deleted successfully.";
    } else {
        echo "Error deleting file.";
    }
} else {
    echo "File does not exist.";
}