How can I get the last day of the month in PHP? Given: $a_date

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Editorial Team

Asked: May 12, 20262026-05-12T20:43:01+00:00 2026-05-12T20:43:01+00:00

How can I get the last day of the month in PHP?

Given:

$a_date = "2009-11-23"

I want 2009-11-30; and given

$a_date = "2009-12-23"

I want 2009-12-31.

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Editorial Team · Answer 1 · 2026-05-12T20:43:01+00:00

Editorial Team

t returns the number of days in the month of a given date (see the docs for date):

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

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