How Can I Find the Last Day of a Month in PHP?

How to Determine the Last Day of a Month Using PHP

In PHP, retrieving the last day of a specified month is a straightforward process. This is particularly useful for various applications, such as determining billing cycles or calculating deadlines.

To ascertain the last day of a month, PHP provides the date('Y-m-t', ...) function. Here's how it works:

<?php
$a_date = "2009-11-23";
echo date("Y-m-t", strtotime($a_date));
?>

In the above example, date('Y-m-t', strtotime($a_date)) returns the value "2009-11-30," because November has 30 days.

This method also works for months with 31 days, such as December:

<?php
$a_date = "2009-12-23";
echo date("Y-m-t", strtotime($a_date));
?>

Here, date('Y-m-t', strtotime($a_date)) yields "2009-12-31," since December has 31 days.

The date('Y-m-t', ...) function simplifies the process of finding the last day of a month, making it an invaluable tool for date-related calculations in PHP applications.

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