PHP date_modify() Function Usage and Example

PHP Date & Time Function Manual

The date_modify() function modifies the value of the date-time (DateTime) object

Definition and Usage

The date_modify() function is an alias of DateTime::modify(). This function is used to modify the date in the DateTime object. It changes the timestamp of the given object.

Syntax

date_modify($object, $modify)

Parameter

Return Value

　Returns the modified DateTime object. If it fails, this function will return a boolean valuefalse.

PHP Version

This function was originally introduced in PHP version5.2introduced in version 5.2.0 and is available in all higher versions.

Online Example

The following examples demonstratedate_modify()Function Usage-

<?php
　　　//Modify Date
　　　$date = date_modify(new DateTime(), "+15　day);　　　
　　　print("Date: ".date_format($date, "Y/m/d"));
?>

Output Result

Date:　2020/05/21

Online Example

The following example creates a DateTime object and usesdate_modify()function to modify its date.-

<?php
　　　//Create a DateTime object
　　　$date_time_Obj = date_create("25-09-1989");
　　　print("Original Date: ".date_format($date_time_Obj, "Y/m/d"));
　　　print("\n");
　　　//Set Date
　　　$date = date_modify($date_time_Obj, "+15　years　7　months　23　days");　　　
　　　print("Modify Date: ".date_format($date, "Y/m/d"));
?>

Output Result

Original Date:　1989/09/25
Modify Date:　2005/05/18

Online Example

You can also modify the date by specifying the number of weeks, such as

<?php
　　　//Create DateTime object
　　　$date_time_Obj = date_create("25-09-1989");
　　　print("Original Date: ".date_format($date_time_Obj, "Y/m/d"));
　　　print("\n");
　　　//Set Date
　　　$date = date_modify($date_time_Obj, "1960 weeks");　　　
　　　print("Modify Date: ".date_format($date, "Y/m/d"));
?>

This will produce the following output-

Original Date:　1989/09/25
Modify Date:　2027/04/19

Online Example

<?php
　　　$date = new DateTime("1990-12-12");
　　　$date->modify("+1　day);
　　　
　　　echo $date->format("Y-m-d());
?>

This will produce the following output-

1990-12-13