Add 1 hour to date & time in PHP
strtotime($time . '+ 1 hour');
This is probably the most magical thing I’ve ever done PHP. Pass in the date and time (in this case, in a variable), tell it what you want to do with it, and out comes the updated date and time. I needed to add an hour to the time I was working with. Seems simple until you think about transition to the next day. This function takes care of advancing the date to the next day if necessary.

Sam Hermes
I'm a web developer at Washington University in St. Louis. I write about WordPress, CSS, JS, accessibility, and more.