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@ 2015-04-14T15:45:53Z

<?php

$diff = strtotime('2015-04-13T13:19:03+01:00')- strtotime('2015-04-14T10:55:28+01:00');
function secs_to_h($secs)
{
        $units = array(
                "week"   => 7*24*3600,
                "day"    =>   24*3600,
                "hour"   =>      3600,
                "minute" =>        60,
                "second" =>         1,
        );

	// specifically handle zero
        if ( $secs == 0 ) return "0 seconds";

        $s = "";

        foreach ( $units as $name => $divisor ) {
                if ( $quot = intval($secs / $divisor) ) {
                        $s .= "$quot $name";
                        $s .= (abs($quot) > 1 ? "s" : "") . ", ";
                        $secs -= $quot * $divisor;
                }
        }

        return substr($s, 0, -2);
}

var_dump($diff, gmdate("m d H:i:s",$diff), secs_to_h($diff));

Output for git.master, git.master_jit, rfc.property-hooks: int(-77785) string(14) "12 31 02:23:35" string(35) "-21 hours, -36 minutes, -25 seconds"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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