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@ 2021-03-23T21:39:40Z

<?php


$date = 1616497508.795654549495619851562;

try {
    print_r("Date (string) : ");
    var_dump($date);
    
    print_r("Date (json_encode) : ");
    var_dump(json_encode($date));

    print_r("DateTimeImmutable::createFromFormat (string) : ");
    var_dump(DateTimeImmutable::createFromFormat(
        'U.u',
        $date
    ));
    
    print_r("DateTimeImmutable::createFromFormat (json_encode) : ");
    var_dump(DateTimeImmutable::createFromFormat(
        'U.u',
        json_encode($date)
    ));
    
    print_r("DateTimeImmutable::createFromFormat \"1616497508.7956545\" : ");
    var_dump(DateTimeImmutable::createFromFormat(
        'U.u',
        "1616497508.7956545"
    ));

    print_r("DateTimeImmutable::createFromFormat \"1616497508.9999999\" : ");
    var_dump(DateTimeImmutable::createFromFormat(
        'U.u',
        "1616497508.9999999"
    ));

    print_r("DateTimeImmutable::createFromFormat \"1616497508.99999999\" : ");
    var_dump(DateTimeImmutable::createFromFormat(
        'U.u',
        "1616497508.99999999"
    ));
} catch (\Exception $e) {
    var_dump($e);
}

Output for git.master, git.master_jit, rfc.property-hooks: Date (string) : float(1616497508.7956545) Date (json_encode) : string(18) "1616497508.7956545" DateTimeImmutable::createFromFormat (string) : object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-23 11:05:08.795700" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } DateTimeImmutable::createFromFormat (json_encode) : bool(false) DateTimeImmutable::createFromFormat "1616497508.7956545" : bool(false) DateTimeImmutable::createFromFormat "1616497508.9999999" : bool(false) DateTimeImmutable::createFromFormat "1616497508.99999999" : bool(false)

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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