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PHP Reference

Quick Reference

The PHP date_interval_format() function is an alias of DateInterval::format().

				
					<?php
$date1 = date_create('2013-01-11');
$date2 = date_create('2023-01-11');
$diff = date_diff($date1, $date2);

echo $diff->format('Total number of days: %a');
?>

Output

				
					Total number of days: 3652

Syntax

				
					DateInterval::format(format)

Parameter

ParameterDescription
formatSpecifies the format for the date; Each format character must be prefixed by a % sign (required):

    % - Literal %
    Y - Year, at least 2 digits with leading zero (e.g 03)
    y - Year (e.g 3)
    M - Month, with leading zero (e.g 06)
    m - Month (e.g 6)
    D - Day, with leading zero (e.g 09)
    d - Day (e.g 9)
    a - Total number of days as a result of date_diff()
    H - Hours, with leading zero (e.g 08, 23)
    h - Hours (e.g 8, 23)
    I - Minutes, with leading zero (e.g 08, 23)
    i - Minutes (e.g 8, 23)
    S - Seconds, with leading zero (e.g 08, 23)
    s - Seconds (e.g 8, 23)
    F - Microseconds, at least 6 digits (e.g 004403, 235689)
    f - Microseconds (e.g 4403, 235689)
    R - Sign "-" when negative, "+" when positive
    r - Sign "-" when negative, empty when positive

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PHP NOTES:

  • When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on

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