PHP 8.4.0 RC4 available for testing

    DateTime::createFromFormat

    date_create_from_format

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    DateTime::createFromFormat -- date_create_from_format — Parses a time string according to a specified format

    Descrizione

    Stile orientato agli oggetti

    public static DateTime::createFromFormat(string $format, string $datetime, ?DateTimeZone $timezone = null): DateTime|false

    Stile procedurale

    date_create_from_format(string $format, string $datetime, ?DateTimeZone $timezone = null): DateTime|false

    Returns a new DateTime object representing the date and time specified by the datetime string, which was formatted in the given format.

    Like DateTimeImmutable::createFromFormat() and date_create_immutable_from_format(), respectively, but creates a DateTime object.

    This method, including parameters, examples, and considerations are documented on the DateTimeImmutable::createFromFormat page.

    Elenco dei parametri

    See DateTimeImmutable::createFromFormat.

    Valori restituiti

    Returns a new DateTime instance o false in caso di fallimento.

    Errori/Eccezioni

    This method throws ValueError when the datetime contains NULL-bytes.

    Log delle modifiche

    Versione Descrizione
    8.0.21, 8.1.8, 8.2.0 Now throws ValueError when NULL-bytes are passed into datetime, which previously was silently ignored.

    Esempi

    For an extensive set of examples, see DateTimeImmutable::createFromFormat.

    Vedere anche:

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    User Contributed Notes 2 notes

    up
    5
    Steven De Volder
    1 year ago
    In the following code:
    $t = microtime(true);
    $now = DateTime::createFromFormat('U.u', $t);
    $now = $now->format("H:i:s.v");

    Trying to format() will return a fatal error if microtime(true) just so happened to return a float with all zeros as decimals. This is because DateTime::createFromFormat('U.u', $aFloatWithAllZeros) returns false.

    Workaround (the while loop is for testing if the solution works):

    $t = microtime(true);
    $now = DateTime::createFromFormat('U.u', $t);
    while (!is_bool($now)) {//for testing solution
    $t = microtime(true);
    $now = DateTime::createFromFormat('U.u', $t);
    }
    if (is_bool($now)) {//the problem
    $now = DateTime::createFromFormat('U', $t);//the solution
    }
    $now = $now->format("H:i:s.v");
    up
    -1
    mariani dot v at sfeir dot com
    10 months ago
    An easiest way to avoid error when microtime returns a non decimal float is to cast its result as a float using sprintf :

    $t = microtime(true);
    $now = DateTime::createFromFormat('U.u', sprintf('%f', $t));
    $now = $now->format("H:i:s.v");
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