Parse string with PHP regular expression?

Question

PHP

You need to write a regular expression to get the year, month, day, hour, minute and second
. The data array is
01:00:05 07/21/2017 (known full date with time ) 01:05
:07/21/2017 (unknown seconds)
01:21.07. 2017 (minutes unknown)
07/21/2017 (date only)
07/2017 (month and year known)
2017 (year known)
01: (
hour and minutes known)
01:05:17 (full time known)

Answer 1

^(((\d{2,2})?:?(\d{2,2})?:?(\d{2,2})?)?\s?((\d{2,2})?\.?(\d{2,2})?\.?(\d{2,4})?)?)$