XIX. Date and Time Functions


These functions allow you to get the date and time from the server where your PHP scripts are running. You can use these functions to format the date and time in many different ways.

Note: Please keep in mind that these functions are dependent on the locale settings of your server. Make sure to take daylight saving time (use e.g. $date = strtotime('+7 days', $date) and not $date += 7*24*60*60) and leap years into consideration when working with these functions.


No external libraries are needed to build this extension.


There is no installation needed to use these functions; they are part of the PHP core.

Runtime Configuration

This extension has no configuration directives defined in php.ini.

Resource Types

This extension has no resource types defined.

Predefined Constants

This extension has no constants defined.

Table of Contents
checkdate -- Validate a Gregorian date
date_sunrise --  Returns time of sunrise for a given day and location
date_sunset --  Returns time of sunset for a given day and location
date -- Format a local time/date
getdate -- Get date/time information
gettimeofday -- Get current time
gmdate -- Format a GMT/UTC date/time
gmmktime -- Get Unix timestamp for a GMT date
gmstrftime --  Format a GMT/UTC time/date according to locale settings
idate --  Format a local time/date as integer
localtime -- Get the local time
microtime --  Return current Unix timestamp with microseconds
mktime -- Get Unix timestamp for a date
strftime --  Format a local time/date according to locale settings
strptime --  Parse a time/date generated with strftime()
strtotime --  Parse about any English textual datetime description into a Unix timestamp
time -- Return current Unix timestamp