date_parse_from_format

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

date_parse_from_format — Get info about given date formatted according to the specified format

Descrizione

date_parse_from_format(string $format, string $datetime): array

Returns associative array with detailed info about given date/time.

Elenco dei parametri

format: Documentation on how the format is used, please refer to the documentation of DateTimeImmutable::createFromFormat(). The same rules apply.
datetime: String representing the date/time.

Valori restituiti

Returns associative array with detailed info about given date/time.

The returned array has keys for year, month, day, hour, minute, second, fraction, and is_localtime.

If is_localtime is present then zone_type indicates the type of timezone. For type 1 (UTC offset) the zone, is_dst fields are added; for type 2 (abbreviation) the fields tz_abbr, is_dst are added; and for type 3 (timezone identifier) the tz_abbr, tz_id are added.

The array includes warning_count and warnings fields. The first one indicate how many warnings there were. The keys of elements warnings array indicate the position in the given datetime where the warning occurred, with the string value describing the warning itself. An example below shows such a warning.

The array also contains error_count and errors fields. The first one indicate how many errors were found. The keys of elements errors array indicate the position in the given datetime where the error occurred, with the string value describing the error itself. An example below shows such an error.

Avviso

The number of array elements in the warnings and errors arrays might be less than warning_count or error_count if they occurred at the same position.

Errori/Eccezioni

This functions 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.
7.2.0	The `zone` element of the returned array represents seconds instead of minutes now, and its sign is inverted. For instance `-120` is now `7200`.

Esempi

Example #1 date_parse_from_format() example

<?php
$date = "6.1.2009 13:00+01:00";
print_r(date_parse_from_format("j.n.Y H:iP", $date));
?>

Il precedente esempio visualizzerà:

Array
(
    [year] => 2009
    [month] => 1
    [day] => 6
    [hour] => 13
    [minute] => 0
    [second] => 0
    [fraction] =>
    [warning_count] => 0
    [warnings] => Array
        (
        )

    [error_count] => 0
    [errors] => Array
        (
        )

    [is_localtime] => 1
    [zone_type] => 1
    [zone] => 3600
    [is_dst] =>
)

Example #2 date_parse_from_format() with warnings example

<?php
$date = "26 August 2022 22:30 pm";
$parsed = date_parse_from_format("j F Y G:i a", $date);

echo "Warnings count: ", $parsed['warning_count'], "\n";
foreach ($parsed['warnings'] as $position => $message) {
    echo "\tOn position {$position}: {$message}\n";
}
?>

Il precedente esempio visualizzerà:

Warnings count: 1
	On position 23: The parsed time was invalid

Example #3 date_parse_from_format() with errors example

<?php
$date = "26 August 2022 CEST";
$parsed = date_parse_from_format("j F Y H:i", $date);

echo "Errors count: ", $parsed['error_count'], "\n";
foreach ($parsed['errors'] as $position => $message) {
    echo "\tOn position {$position}: {$message}\n";
}
?>

Il precedente esempio visualizzerà:

Errors count: 3
	On position 15: A two digit hour could not be found
	On position 19: Data missing

Vedere anche:

DateTimeImmutable::createFromFormat() - Parses a time string according to a specified format
checkdate() - Valida una data gregoriana

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User Contributed Notes 1 note

down

jp dot amarok at email dot cz ¶

2 months ago

It seems that the safest way to check for errors is not by checking the number of errors, but warnings instead. See the following example where "m" and "d" are swapped and thus not correct.

<?php
var_dump( date_parse_from_format('m.d.Y', '18.10.2024') );

OUTPUT:
array(12) {
  ["year"]=>
  int(2024)
  ["month"]=>
  int(18)
  ["day"]=>
  int(10)
  ["hour"]=>
  bool(false)
  ["minute"]=>
  bool(false)
  ["second"]=>
  bool(false)
  ["fraction"]=>
  bool(false)
  ["warning_count"]=>
  int(1)
  ["warnings"]=>
  array(1) {
    [10]=>
    string(27) "The parsed date was invalid"
  }
  ["error_count"]=>
  int(0)
  ["errors"]=>
  array(0) {
  }
  ["is_localtime"]=>
  bool(false)
}
?>

The function simply assigns 18 to the "month" field without errors!! So simply use an if-condition and check "warning_count" to detect possible errors.

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