(PHP 4 = 4.0.6)
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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.
注: This function was added in 4.0.6.