How To Get Client Timezone In Utc Format Like (utc+05:00) In Php Or Javascript

I want to get timezone of visitors of my application in UTC format like (UTC+05:00) in php or javascript. I have already tried this but it does not help me out it returns the resu

Solution 1:

Here is a javascript solution :

let date = newDate(); 
console.log('UTC' + 
(-date.getTimezoneOffset() < 0 ? '-' : '+') + 
(Math.abs(date.getTimezoneOffset() / 60) < 10 ? '0' : '') + 
(Math.abs(date.getTimezoneOffset() / 60)) + ':00'
);