note 102705 added to function.strtotime

PHP strtotime() does not handle the ISO8601 notation for "duration."  This handles the most likely subset of the duration standard (the one that is used by eBay).
<?php // RAY_duration_strtotime.php
error_reporting(E_ALL);
date_default_timezone_set('America/New_York');

// WHAT DOES THIS STRING MEAN?
$str = 'P1Y3M2DT16H2M40S';

// IT IS THE ISO8601 FORMAT FOR A DURATION.
// SEE http://en.wikipedia.org/wiki/ISO_8601

// IT MEANS THIS:
// P   = Pending (INDICATOR OF ISO8601 DURATION)
// 1Y  = 1 Year
// 3M  = 3 Months
// 2D  = Two Days
// T   = Time Separator (M is ambiguous)
// 16H = Sixteen hours
// 2M  = Two minutes
// 40S = Forty seconds

// STRTOTIME CANNOT HANDLE ISO-8601 DURATIONS
$dur = strtotime($str);
var_dump($dur);
echo "<br/>";

// GET THE DURATION IN SECONDS FOR USE IN ARITHMETIC
$dur = duration_strtotime($str);
echo "<br/>" . number_format($dur) . ' SECONDS';

// USE THE DURATION IN ARITHMETIC
echo "<br/>" . date('r', strtotime("NOW + $dur SECONDS"));

// A FUNCTION TO MAKE A DURATION STRING INTO A NUMBER OF SECONDS
function duration_strtotime($str, $sho=FALSE)
{
    // REMOVE THE AMBIGUITY OF MONTH AND MINUTE -- MAKE MONTH = X
    $arr = explode('T', $str);
    $arr[0] = str_replace('M', 'X', $arr[0]);
    $new = implode('T', $arr);

    // EXPAND THE STRING INTO SOMETHING SENSIBLE
    $new = str_replace('S', 'seconds ', $new);
    $new = str_replace('M', 'minutes ', $new);
    $new = str_replace('H', 'hours ',   $new);
    $new = str_replace('T', ' ',        $new);
    $new = str_replace('D', 'days',     $new);
    $new = str_replace('X', 'months ',  $new);
    $new = str_replace('Y', 'years ',   $new);
    $new = str_replace('P', NULL,       $new);

    if ($sho) var_dump($new);

    // RETURN THE NUMBER OF SECONDS IN THE DURATION
    return strtotime($new) - strtotime('NOW');
}
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Server IP: 69.147.83.197
Probable Submitter: 98.169.58.122
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Manual Page -- http://www.php.net/manual/en/function.strtotime.php
Edit        -- https://master.php.net/note/edit/102705
Del: integrated  -- https://master.php.net/note/delete/102705/integrated
Del: useless     -- https://master.php.net/note/delete/102705/useless
Del: bad code    -- https://master.php.net/note/delete/102705/bad+code
Del: spam        -- https://master.php.net/note/delete/102705/spam
Del: non-english -- https://master.php.net/note/delete/102705/non-english
Del: in docs     -- https://master.php.net/note/delete/102705/in+docs
Del: other reasons-- https://master.php.net/note/delete/102705
Reject      -- https://master.php.net/note/reject/102705
Search      -- https://master.php.net/manage/user-notes.php