(PHP 4 >= 4.2.0, PHP 5)
openssl_pkey_get_public — Extract public key from certificate and prepare it for use
说明resource openssl_pkey_get_public ( mixed $certificate )
openssl_get_publickey() extracts the public key from certificate and prepares it for use by other functions.
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/private key (it may contain both).
- A PEM formatted private key.
Returns a positive key resource identifier on success, or FALSE on error.