openssl_pkey_get_public

openssl_get_publickey() extracts the public key from certificate and prepares it for use by other functions.

certificate can be one of the following:

1. an X.509 certificate resource
2. 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).
3. A PEM formatted public key.

Returns a positive key resource identifier on success, or FALSE on error.