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PHP

Formats the interval


DateInterval::format

(PHP 5 >= 5.3.0)

DateInterval::formatFormats the interval

Description

public string DateInterval::format ( string $format )

Formats the interval.

Parameters

format

The following characters are recognized in the format parameter string. Each format character must be prefixed by a percent sign (%).
format character Description Example values
% Literal % %
Y Years, numeric, at least 2 digits with leading 0 01, 03
y Years, numeric 1, 3
M Months, numeric, at least 2 digits with leading 0 01, 03, 12
m Months, numeric 1, 3, 12
D Days, numeric, at least 2 digits with leading 0 01, 03, 31
d Days, numeric 1, 3, 31
a Total amount of days 4, 18, 8123
H Hours, numeric, at least 2 digits with leading 0 01, 03, 23
h Hours, numeric 1, 3, 23
I Minutes, numeric, at least 2 digits with leading 0 01, 03, 59
i Minutes, numeric 1, 3, 59
S Seconds, numeric, at least 2 digits with leading 0 01, 03, 57
s Seconds, numeric 1, 3, 57
R Sign "-" when negative, "+" when positive -, +
r Sign "-" when negative, empty when positive -,

Return Values

Returns the formatted interval.

Notes

Note:

The DateInterval::format() method does not recalculate carry over points in time strings nor in date segments. This is expected because it is not possible to overflow values like "32 days" which could be interpreted as anything from "1 month and 4 days" to "1 month and 1 day".

Examples

Example #1 DateInterval example

<?php

$interval 
= new DateInterval('P2Y4DT6H8M');
echo 
$interval->format('%d days');

?>

The above example will output:

 4 days 

Example #2 DateInterval and carry over points

<?php

$interval 
= new DateInterval('P32D');
echo 
$interval->format('%d days');

?>

The above example will output:

 32 days 

Example #3 DateInterval and DateTime::diff() with the %a and %d modifiers

<?php

$january 
= new DateTime('2010-01-01');
$february = new DateTime('2010-02-01');
$interval $february->diff($january);

// %a will output the total number of days.
echo $interval->format('%a total days')."\n";

// While %d will only output the number of days not already covered by the
// month.
echo $interval->format('%m month, %d days');

?>

The above example will output:

 31 total days 1 month, 0 days 



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