How to make the script work on geoip only for a specific city?

Question

PHP

How to fasten it so that the script works by geoip only for a specific city?

<?php
{
echo json_encode('<script language="JavaScript"> 
window.location.href = "http://site.ru/"
</script>');
}

32497,"RU","66","Saint Petersburg"

Answer 1

Connect the library that has data on ip. write down the condition. If ip is so-and-so, then do that.