ParagonIE_Sodium_Compat::memzero( string|null $var ): void

3822    public static function memzero(3823        #[\SensitiveParameter]3824        &$var3825    ) {3826        /* Type checks: */3827        ParagonIE_Sodium_Core_Util::declareScalarType($var, 'string', 1);3828 3829        if (self::useNewSodiumAPI()) {3830            /** @psalm-suppress MixedArgument */3831            sodium_memzero($var);3832            return;3833        }3834        if (self::use_fallback('memzero')) {3835            $func = '\\Sodium\\memzero';3836            $func($var);3837            if ($var === null) {3838                return;3839            }3840        }3841        // This is the best we can do.3842        throw new SodiumException(3843            'This is not implemented in sodium_compat, as it is not possible to securely wipe memory from PHP. ' .3844            'To fix this error, make sure libsodium is installed and the PHP extension is enabled.'3845        );3846    }