PHP Date Exercises : Increment date by one month

Last update on June 03 2025 12:55:59 (UTC/GMT +8 hours)

24. Increment Date by One Month

Write a PHP script to increment date by one month.

Sample date : 2012-12-21

Sample Solution:

PHP Code:

<?php
// Convert the date string "2012-12-21" to a Unix timestamp
$dt = strtotime("2012-12-21");

// Add 1 month to the given date using strtotime() function
// and output the result in the format "Y-m-d"
echo date("Y-m-d", strtotime("+1 month", $dt))."\n";
?>

Output:

2013-01-21

Explanation:

In the exercise above,

$dt = strtotime("2012-12-21");: Converts the date string "2012-12-21" to a Unix timestamp using the "strtotime()" function.
echo date("Y-m-d", strtotime("+1 month", $dt))."\n";: Adds 1 month to the given date using the "strtotime()" function with the "+1 month" argument, and then formats the result as "Year-Month-Day" using the "date(") function. Finally, it prints the resulting date.

Flowchart :

For more Practice: Solve these Related Problems:

Write a PHP script to take a date input and output the date exactly one month later, handling year transitions correctly.
Write a PHP function that adds one month to a given date and returns the new date in ISO format.
Write a PHP program to increment a date by one month and then compare it with the original date to display the difference in days.
Write a PHP script to calculate the next month's date by using DateTime::modify() and then output the result in a user-friendly format.

Go to:

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PHP Code Editor:

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