PHP Day add function

How to add 2 days to a date in PHP? There are many ways to add days to a string…

November 11, 2009

How to add 2 days to a date in PHP?
There are many ways to add days to a string date. The best function is the following one:

function dayadd($days,$date=null , $format="d/m/Y"){
	return date($format,strtotime($days." days",strtotime( $date ? $date : date($format) )));

This function let you decide the date to which add the days, the output format and days to add. To use the function look these examples:

echo dayadd(2);  // 2 days after today
echo dayadd(-2,null,"Y-m-d");  // 2 days before today with given format
echo dayadd(3,"12/31/2009");  // 3 days after given date
echo dayadd(3,"12/31/2009","d-m-Y");  // 3 days after given date with given format


I'm a software engineer, an everyday web developer and a maker. I usually build sites with PHP, within or without WordPress. I build Internet of Things with Arduino and ESP8266. I'm the founder of and and I'm actually the Chief Technical Officer of Better Days web agency.

Comments on “PHP Day add function”

2 thoughts

  1. JasonDavis says:

    Sorry I am not sure what kind of time can I pass into this? I store times as UTC time in a regualr integer filed in mysql, I am thinking my utc time stamp will not work?

  2. admin says:

    I use to work with DATE fields in my tables with YYYY-MM-DD format, but this function should work also with other formats (d-m-Y or m-d-Y), I’ve not tested every combination. You should add characters “-” to your integer date and convert it to a string to use this function.

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