# 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

### 说明

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

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

### 参数

`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.

### 返回值

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.

警告

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.

### 错误／异常

This functions throws ValueError when the `datetime` contains NULL-bytes.

### 更新日志

版本 | 说明
--- | ---
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`.

### 示例

示例 #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));`

以上示例会输出：

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

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

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

示例 #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";
}`

以上示例会输出：

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

示例 #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";
}`

以上示例会输出：

    Errors count: 3
    	On position 15: A two digit hour could not be found
    	On position 19: Not enough data available to satisfy format

### 参见

- DateTimeImmutable::createFromFormat() - Parses a time string according to a specified format
- checkdate() - 验证一个格里高里日期

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