Date_ADD函数在MySQL中有效，但在php中无效

I have searched everywhere but I cant find anyone else experiencing this

When I run this in MySQL (via phpmyadmin) it works fine

 UPDATE users SET timetoken=DATE_ADD((now()), INTERVAL 1 HOUR) WHERE username='usman'

And then this is my php

 mysqli_query($con,"UPDATE users SET timetoken=DATE_ADD((now()), INTERVAL 5 HOUR) WHERE username='usman'");

It will update the field, but oddly enough it changes the date to the current time and does not add the hours

Can anyone help?

Try:

// Set $q to sql query
$q = "UPDATE users SET timetoken = DATE_ADD(CURRENT_TIMESTAMP, INTERVAL 5 HOUR) WHERE username = 'usman'";

// Execute query
mysqli_query($con, $q);