For use in Versions prior V5.3:
<?php
if (!function_exists('date_parse_from_format')) {
function date_parse_from_format($format, $date) {
// reverse engineer date formats
$keys = array(
'Y' => array('year', '\d{4}'),
'y' => array('year', '\d{2}'),
'm' => array('month', '\d{2}'),
'n' => array('month', '\d{1,2}'),
'M' => array('month', '[A-Z][a-z]{3}'),
'F' => array('month', '[A-Z][a-z]{2,8}'),
'd' => array('day', '\d{2}'),
'j' => array('day', '\d{1,2}'),
'D' => array('day', '[A-Z][a-z]{2}'),
'l' => array('day', '[A-Z][a-z]{6,9}'),
'u' => array('hour', '\d{1,6}'),
'h' => array('hour', '\d{2}'),
'H' => array('hour', '\d{2}'),
'g' => array('hour', '\d{1,2}'),
'G' => array('hour', '\d{1,2}'),
'i' => array('minute', '\d{2}'),
's' => array('second', '\d{2}')
);
// convert format string to regex
$regex = '';
$chars = str_split($format);
foreach ($chars AS $n => $char) {
$lastChar = isset($chars[$n - 1]) ? $chars[$n - 1] : '';
$skipCurrent = '\\' == $lastChar;
if (!$skipCurrent && isset($keys[$char])) {
$regex .= '(?P<' . $keys[$char][0] . '>' . $keys[$char][1] . ')';
} else if ('\\' == $char) {
$regex .= $char;
} else {
$regex .= preg_quote($char);
}
}
$dt = array();
$dt['error_count'] = 0;
// now try to match it
if (preg_match('#^' . $regex . '$#', $date, $dt)) {
foreach ($dt AS $k => $v) {
if (is_int($k)) {
unset($dt[$k]);
}
}
if (!checkdate($dt['month'], $dt['day'], $dt['year'])) {
$dt['error_count'] = 1;
}
} else {
$dt['error_count'] = 1;
}
$dt['errors'] = array();
$dt['fraction'] = '';
$dt['warning_count'] = 0;
$dt['warnings'] = array();
$dt['is_localtime'] = 0;
$dt['zone_type'] = 0;
$dt['zone'] = 0;
$dt['is_dst'] = '';
return $dt;
}
}
?>
Not my invention though. I found it here: http://stackoverflow.com/questions/6668223/php-date-parse-from-format-alternative-in-php-5-2
Thought this might be a good place to keep a copy in case someone stumbles upon the same problem facing outdated PHP versions on customer servers ....
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
Returns associative array with detailed info about given date/time.
参数
-
format -
Documentation on how the
formatis 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] =>
[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: Data missing
参见
- DateTimeImmutable::createFromFormat() - Parses a time string according to a specified format
- checkdate() - 验证一个格里高里日期
add a note
User Contributed Notes 2 notes
Archetrix ¶
10 years ago
gilles dot migliori at gmail dot com ¶
6 years ago
$date = "10 October 2018 19:30 pm";
print_r (date_parse_from_format("j F Y G:i a", $date));
Output:
Array (
[year] => 2018
[month] => 10
[day] => 10
[hour] => 31
[minute] => 30
[second] => 0
[fraction] =>
[warning_count] => 1
[warnings] => Array (
[24] => The parsed time was invalid
)
[error_count] => 0
[errors] => Array ( )
[is_localtime] =>
)
19:30 pm is invalid, 24-hour format of an hour can't be used with am/pm
must be replaced with:
$date = "10 October 2018 19:30";
print_r (date_parse_from_format("j F Y G:i", $date));
or:
$date = "10 October 2018 7:30 pm";
print_r (date_parse_from_format("j F Y g:i a", $date));
