( mixed x509cert [, bool shortnames] )
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may
change without notice in a future release of PHP. Use this function at your own risk.
openssl_x509_parse() returns information about the supplied x509cert, including fields such as subject name, issuer name, purposes, valid from
and valid to dates etc. shortnames controls how the data is indexed in the array - if shortnames is TRUE
(the default) then fields will be indexed with the short name form, otherwise, the long name form will be used - e.g.: CN is the shortname form of commonName.
The structure of the returned data is (deliberately) not yet documented, as it is still subject to change.