openssl_pkey_get_public(3) php man page | unix.com

OPENSSL_PKEY_GET_PUBLIC(3)						 1						OPENSSL_PKEY_GET_PUBLIC(3)

openssl_pkey_get_public - Extract public key from certificate and prepare it for use

SYNOPSIS
       resource openssl_pkey_get_public (mixed	$certificate)

DESCRIPTION
       openssl_get_publickey(3) extracts the public key from $certificate and prepares it for use by other functions.

PARAMETERS
	      o $certificate
		-$certificate can be one of the following:

		     oan X.509 certificate resource

		     oa string having the format
		       file://path/to/file.pem. The named file must contain a PEM encoded certificate/public key (it may contain both).

		     oA PEM formatted public key.

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

PHP Documentation Group 												OPENSSL_PKEY_GET_PUBLIC(3)