openssl_pkey_get_public Extract public key from certificate and prepare it for use &reftitle.description; resourceopenssl_pkey_get_public mixedcertificate openssl_get_publickey extracts the public key from certificate and prepares it for use by other functions. &reftitle.parameters; certificate certificate can be one of the following: an X.509 certificate resource a string having the format file://path/to/file.pem. The named file must contain a PEM encoded certificate/public key (it may contain both). A PEM formatted public key. &reftitle.returnvalues; Returns a positive key resource identifier on success, or &false; on error.