php中关于microtime输出重复问题

<code>static void _php_gettimeofday(INTERNAL_FUNCTION_PARAMETERS, int mode)
{
    zend_bool get_as_float = 0;
    struct timeval tp = {0};

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|b", &get_as_float) == FAILURE) {
        return;
    }

    if (gettimeofday(&tp, NULL)) {
        RETURN_FALSE;
    }

    if (get_as_float) {
        RETURN_DOUBLE((double)(tp.tv_sec + tp.tv_usec / MICRO_IN_SEC));
    }

    if (mode) {
        timelib_time_offset *offset;

        offset = timelib_get_time_zone_info(tp.tv_sec, get_timezone_info(TSRMLS_C));
                
        array_init(return_value);
        add_assoc_long(return_value, "sec", tp.tv_sec);
        add_assoc_long(return_value, "usec", tp.tv_usec);

        add_assoc_long(return_value, "minuteswest", -offset->offset / SEC_IN_MIN);
        add_assoc_long(return_value, "dsttime", offset->is_dst);

        timelib_time_offset_dtor(offset);
    } else {
        char ret[100];

        snprintf(ret, 100, "%.8F %ld", tp.tv_usec / MICRO_IN_SEC, tp.tv_sec);
        RETURN_STRING(ret, 1);
    }
}</code>