Path to local certificate file on filesystem. It must be a PEM-encoded
file which contains certificate. It can optionally contain the
certificate chain of issuers.
Key for an item of the options' array used in
EventSslContext::__construct().
Represents path where the certificate authority file should be
searched for.
Key for an item of the options' array used in
EventSslContext::__construct().
Represents maximum depth for the certificate chain verification that
shall be allowed for the SSL context.