date_parse_from_format()

(PHP 5 >= 5.3.0, PHP 7)

Get info about given date formatted according to the specified format

说明

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

Returns associative array with detailed info about given date.

参数

$format

Format accepted byDateTime::createFromFormat().

$date

String representing the date.

返回值

Returns associative array with detailed info about given date.

更新日志

范例

Example #1date_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));
?>

以上例程会输出：

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] => 
)

参见

• DateTime::createFromFormat() 根据给定的格式解析日期时间字符串
• checkdate() 验证一个格里高里日期

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 = "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));