How can the echo function be utilized to troubleshoot and verify the file path before executing the 'unlink' function in PHP?

To troubleshoot and verify the file path before executing the 'unlink' function in PHP, you can use the 'echo' function to output the file path before attempting to delete it. This allows you to visually confirm that the correct file path is being passed to the 'unlink' function, helping to prevent accidental deletion of the wrong file.

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

// Output the file path for verification
echo "File path: " . $file_path;

// Check if the file exists before attempting to delete it
if (file_exists($file_path)) {
    // Delete the file
    unlink($file_path);
    echo "File deleted successfully.";
} else {
    echo "File not found.";
}