YplusX = $YplusX; if ($YminusX === null) { $YminusX = new ParagonIE_Sodium_Core_Curve25519_Fe(); } $this->YminusX = $YminusX; if ($Z === null) { $Z = new ParagonIE_Sodium_Core_Curve25519_Fe(); } $this->Z = $Z; if ($T2d === null) { $T2d = new ParagonIE_Sodium_Core_Curve25519_Fe(); } $this->T2d = $T2d; } }