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Top Forums Shell Programming and Scripting Valid separator in time and date format Post 303035841 by Chubler_XL on Tuesday 4th of June 2019 07:54:28 PM
Old 06-04-2019
I think the way to tackle this problem is to start by converting the format string to a RE with named groups e.g %m-%d-%y would become (?<d>\d\d)-(?<m>\d\d)-(?<Y>\d{4})

There are still locale issues as %a would become (?<a>Mon|Tue|Wed|Thu|Fri|Sat|Sun) in English locals but (?<a>Lun|Mar|Mer|Jeu|Ven|Sam|Dim) in French locals.

Once this is done if a string matches the RE you can then pull out the named group values and verify they go together correctly e.g that a=Tue is correct for d=4 m=6 Y=2019.
 

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DATE_PARSE_FROM_FORMAT(3)						 1						 DATE_PARSE_FROM_FORMAT(3)

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

SYNOPSIS
array date_parse_from_format (string $format, string $date) DESCRIPTION
Returns associative array with detailed info about given date. PARAMETERS
o $format - Format accepted by DateTime.createFromFormat(3). o $date - String representing the date. RETURN VALUES
Returns associative array with detailed info about given date. EXAMPLES
Example #1 date_parse_from_format(3) example <?php $date = "6.1.2009 13:00+01:00"; print_r(date_parse_from_format("j.n.Y H:iP", $date)); ?> The above example will output: 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] => -60 [is_dst] => ) SEE ALSO
DateTime.createFromFormat(3), checkdate(3). PHP Documentation Group DATE_PARSE_FROM_FORMAT(3)
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