Date & Time

This tutorial for beginners to PHP explains how to generate a calendar for a particular month which you can then include in your website

When validating dates in PHP you can either do it the hard way, by spending some time putting together a regular expression, or the easy way, by using a predefined function.

To calculate the remainder of a subscription time in PHP we need three items: the end date from the future in timestamp format, the current date in timestamp format, and a function to convert the difference between the two from seconds into days, months and maybe even years.

Sometimes, you might need to convert an integer representing seconds into a format that is easier to read. These functions can be used to turn a number of seconds into a simple format of HH:MM:SS, with leading zeros (ex. 15272 = 04:14:32). This can be used for countdown scripts, which is why I also include both a PHP and a JavaScript version.

This tutorial explains how to handle converting times to different time zones using the DateTime and DateTimeZone classes provided by PHP 5.2.0+. It will show how to collect the time zone in the Area/Location format and how to use it for converting to and from that zone. This is useful for online applications that will be used by users in many locations.

How to calculate the difference between two dates in PHP.

Many registration forms request registrants' birth dates. This function allows you to use that information to determine a person's age. This is useful when determining whether COPPA requires parental consent (if the user is under 13).

In this tutorial I will show you how to create a simple count down system.

This tutorial will show you how to add your page load time to your PHP pages. It includes code that is able to be copy and pasted for easy assembly.

This will calculate and show how many days there are from the current date to a date in the future that you define.

A code snippet that displays today's date in the title bar of your web page.

This tutorial describes how to write a simple script which looks at a list of events and only displays the events that occur today or in the future.

This basic tutorial shows four different ways of displaying date and time using PHP functions on your Web page.

Simple tutorial explains how to add date time stamp "page last updated on..." for a specified file using filemtime function.