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@ 2023-09-05T20:04:52Z

<?php

$test = static function (string $expected, int $precision): void {
    
    $date = DateTimeImmutable::createFromFormat('U.u', $expected);
    echo 'Testing "', $date->format('Y-m-d H:i:s.u'), '" with given precision (', $precision, ')', PHP_EOL;
    
    ini_set('serialize_precision', $precision);
    
    
    $encoded = json_encode((float) $date->format('U.u'));

    var_dump($expected, $encoded, $expected === $encoded);
    
    if ($expected === $encoded) {
        echo PHP_EOL;
        return;
    }
    
    $adjustedPrecision = strlen($date->format('Uu'));
    
    echo 'Testing with adjusted precision (', $adjustedPrecision, ')', PHP_EOL;
    
    ini_set('serialize_precision', $adjustedPrecision);

    $encoded = json_encode((float) $date->format('U.u'));

    var_dump($expected, $encoded, $expected === $encoded);
    
    echo PHP_EOL;
};

// $test('1487285080.123456', 8);
// $test('1487285080.123456', 16);
// $test('11487285080.123456', 16);
// $test('112487285080.123456', -1);
// $test('9999999999.999999', -1);
$test('9999999999.999994', -1);
$test('9999999999.999995', -1);

Output for git.master, git.master_jit: /bin/php-git-master: error while loading shared libraries: libonig.so.5: cannot open shared object file: No such file or directory
Process exited with code 127.
Output for rfc.property-hooks: Testing "2286-11-20 17:46:39.999994" with given precision (-1) string(17) "9999999999.999994" string(17) "9999999999.999994" bool(true) Testing "2286-11-20 17:46:39.999995" with given precision (-1) string(17) "9999999999.999995" string(17) "9999999999.999994" bool(false) Testing with adjusted precision (16) string(17) "9999999999.999995" string(17) "9999999999.999994" bool(false)

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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