Date/Time
PHP Manual

The DateInterval class

(PHP 5 >= 5.3.0)

Introduction

Representation of date interval. A date interval stores either a fixed amount of time (in years, months, days, hours etc) or a relative time string in the format that DateTime's constructor supports.

Class synopsis

DateInterval {
/* Properties */
public integer $y ;
public integer $m ;
public integer $d ;
public integer $h ;
public integer $i ;
public integer $s ;
public integer $invert ;
public mixed $days ;
/* Methods */
public __construct ( string $interval_spec )
public static DateInterval createFromDateString ( string $time )
public string format ( string $format )
}

Properties

y

Number of years.

m

Number of months.

d

Number of days.

h

Number of hours.

i

Number of minutes.

s

Number of seconds.

invert

Is 1 if the interval is inverted and 0 otherwise. See DateInterval::format().

days

Total number of days between the starting and ending dates in a DateTime::diff() calculation. days will be FALSE in other circumstances.

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Date/Time
PHP Manual