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PHP Date

The PHP date() function is used to format a time or a date.

The PHP Date() Function

The PHP date() function formats a timestamp to a more readable date and time.

Syntax

date(format,timestamp)

PHP Date - What is a Timestamp?

A timestamp is the number of seconds since January 1, 1970 at 00:00:00 GMT. This is also known as the Unix Timestamp.

PHP Date - Format the Date

The first parameter in the date() function specifies how to format the date/time. It uses letters to represent date and time formats. Here are some of the letters that can be used:

• d - The day of the month (01-31)
• m - The current month, as a number (01-12)
• Y - The current year in four digits

Other characters, like"/", ".", or "-" can also be inserted between the letters to add additional formatting:

<?php
echo date("Y/m/d");
echo "<br />";
echo date("Y.m.d");
echo "<br />";
echo date("Y-m-d");
?>

The output of the code above could be something like this:

2006/07/11
2006.07.11
2006-07-11

PHP Date - Adding a Timestamp

The second parameter in the date() function specifies a timestamp. This parameter is optional. If you do not supply a timestamp, the current time will be used.

In our next example we will use the mktime() function to create a timestamp for tomorrow.

The mktime() function returns the Unix timestamp for a specified date.

Syntax

mktime(hour,minute,second,month,day,year,is_dst)

To go one day in the future we simply add one to the day argument of mktime():

<?php
$tomorrow = mktime(0,0,0,date("m"),date("d")+1,date("Y"));
echo "Tomorrow is ".date("Y/m/d", $tomorrow);
?>

The output of the code above could be something like this:

Tomorrow is 2006/07/12

• Introduction to PHP
• PHP Installation
• PHP Syntax
• PHP Variables
• PHP String
• PHP Operators
• PHP If...Else Statements
• PHP Switch Statement
• PHP Arrays
• PHP Looping
• PHP Functions
• PHP Forms and User Input
• PHP $_GET
• PHP $_POST
• PHP Include File
• PHP File Handling
• PHP File Upload
• PHP Cookies
• PHP Sessions
• PHP Sending E-mails
• PHP Secure E-mails
• PHP Error Handling
• PHP Exception Handling
• PHP Filter
• PHP MySQL Introduction
• PHP MySQL Connect to a Database
• PHP MySQL Create Database and Tables
• PHP MySQL Insert Into
• PHP MySQL Select
• PHP MySQL The Where Clause
• PHP MySQL Order By Keyword
• PHP MySQL Update
• PHP MySQL Delete From
• PHP Database ODBC

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