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@ 2012-09-06T16:52:38Z

<?php
function scholar_parse_time($time)
{
    if (preg_match('/^\s*(?P<hour>\d+)(?>:(?P<minute>\d+))?(?>:(?P<second>\d+(\.\d*)?))?\s*$/', $time, $match)) {
        $h = intval($match['hour']);
        $m = isset($match['minute']) ? intval($match['minute']) : null;
        $s = isset($match['second']) ? floatval($match['second']) : null;

        if ($h < 24 && (null === $m || $m < 60) && (null === $s || $s < 60)) {
            if (null === $s) {
                $is = null;
                $ms = null;
            } else {
                $is = intval($s);
                $ms = round(($s - $is) * 1000);
            }

            return array(
                'hour'   => $h,
                'minute' => $m,
                'second' => $is,
                'millis' => $ms,
                'iso'    => null === $m
                            ? sprintf('%02d', $h)
                            : (null === $s
                                ? sprintf('%02d:%02d', $h, $m)
                                : sprintf('%02d:%02d:%02d', $h, $m, $s)
                            ),
            );
        }
    }

    return false;
}

var_dump(scholar_parse_time('0'));
var_dump(scholar_parse_time('0:1:1'));
var_dump(scholar_parse_time('0:1:1.1'));
var_dump(scholar_parse_time('0:1:1.'));

Output for git.master, git.master_jit, rfc.property-hooks: array(5) { ["hour"]=> int(0) ["minute"]=> NULL ["second"]=> NULL ["millis"]=> NULL ["iso"]=> string(2) "00" } array(5) { ["hour"]=> int(0) ["minute"]=> int(1) ["second"]=> int(1) ["millis"]=> float(0) ["iso"]=> string(8) "00:01:01" } array(5) { ["hour"]=> int(0) ["minute"]=> int(1) ["second"]=> int(1) ["millis"]=> float(100) ["iso"]=> string(8) "00:01:01" } array(5) { ["hour"]=> int(0) ["minute"]=> int(1) ["second"]=> int(1) ["millis"]=> float(0) ["iso"]=> string(8) "00:01:01" }

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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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