Syntex error, unexpected identifier "fwrite"

I was trying to code this but it shows- syntex error, unexpexted identifier "fwrite" - on the 3rd line. What can I do?

<?php
$file = fopen("my-name.txt", "a")
fwrite($file, "\t\t\t\t\t\t");

...

The code: https://i.stack.imgur.com/7Yh1t.jpg