openssl_spki_export Exports a valid PEM formatted public key signed public key and challenge &reftitle.description; stringopenssl_spki_export stringspkac Exports PEM formatted public key from encoded signed public key and challenge &reftitle.parameters; spkac Expects a valid signed public key and challenge &reftitle.returnvalues; Returns the associated PEM formatted public key or NULL on failure. &reftitle.errors; Emits an E_WARNING level error if an invalid argument is passed via the spkac parameter. &reftitle.examples; Extracts the associated PEM formatted public key or NULL on failure. ]]> Extracts the associated PEM formatted public key issued from the <keygen> element ]]> &reftitle.seealso; openssl_spki_new openssl_spki_verify openssl_spki_export_challenge openssl_md_method openssl_csr_new openssl_csr_sign