How Can I Find the Last Day of a Month Using PHP's `date()` Function?

Finding the Last Day of the Month in PHP

Determining the last day of a given month is a common task in programming. PHP provides several approaches to achieve this, one of which involves utilizing the date() function.

Using date() to Find Last Day of Month

The date() function allows you to manipulate dates and time, including extracting the number of days in a month. To find the last day of the month, you can use the following formula:

date("Y-m-t", strtotime($date));

where:

• $date is the given date in a string format (e.g., "2009-11-23").
• strtotime() converts the string date to a timestamp.
• date("Y-m-t", ...) extracts the year, month, and number of days in the month (e.g., "2009-11-30").

Example:

$a_date = "2009-11-23";
echo date("Y-m-t", strtotime($a_date)); // Output: 2009-11-30

This code snippet demonstrates how to get the last day of November 2009, which is November 30th.

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