compare time variable with a another string in php

[tiota]

how to compare $timeout variable with another string.

Lets say $timeout = "00:00:00" in my database, and I want to check

whether $timeout contains the string value 00:00:00

I tried this in my code it did not work correctly

 

if ($timeout =="00:00:00")

{

      echo "User did not sign-out ";

}

esle{

    echo "User signed out";

}