date_modify()
date_modify() — Alias of DateTime::modify().
Built-in function of PHP 8.5. The manual lists it as available in PHP 5 >= 5.2.0, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
date_modify() is an alias of DateTime::modify(): same parameters, same return value.
Signature
date_modify(DateTime $object, string $modifier): DateTime|false
Parameters
| Parameter | Type | What it takes |
|---|---|---|
| $object | DateTime | Procedural style only: A DateTime object returned by date_create(). The function modifies this object. |
| $modifier | string | A date/time string. Valid formats are explained in Date and Time Formats. |
Return value
Returns DateTime on success. Procedural style returns false on failure.
Example
A runnable snippet:
$date = new DateTime('2006-12-12'); $date->modify('+1 day'); echo $date->format('Y-m-d');
Output:
2006-12-13
All PHP 8.5 built-in functions
Reference card built from the PHP manual page date_modify() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.