openssl_spki_export Exports a valid PEM formatted public key signed public key and challenge &reftitle.description; stringfalseopenssl_spki_export stringspki Exports PEM formatted public key from encoded signed public key and challenge &reftitle.parameters; spki Expects a valid signed public key and challenge &reftitle.returnvalues; Returns the associated PEM formatted public key or &false; on failure. &reftitle.errors; Emits an E_WARNING level error if an invalid argument is passed via the spki 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_get_md_methods openssl_csr_new openssl_csr_sign