($width) AND $width .= 'px';
        $style = " style=\"width: $width\"";
    }
    $value = $value ? $value : date('H:i');
    $s = "<input type=\"time\" name=\"$name\" id=\"$name\" class=\"form-control\" value=\"$value\" $style />";
    return $s;
}

// form_date('start', '2018-07-05') 为空则当前日期
function form_date($name, $value = 0, $width = FALSE)
{
    $style = '';
    if (FALSE !== $width) {
        is_numeric($width) AND $width .= 'px';
        $style = " style=\"width: $width\"";
    }
    $value = $value ? $value : date('Y-m-d');
    $s = "<input type=\"date\" name=\"$name\" id=\"$name\" class=\"form-control\" value=\"$value\" $style />";
    return $s;
}

/**用法
 *
 * echo form_radio_yes_no('radio1', 0);
 * echo form_checkbox('aaa', array('无', '有'), 0);
 *
 * echo form_radio_yes_no('aaa', 0);
 * echo form_radio('aaa', array('无', '有'), 0);
 * echo form_radio('aaa', array('a'=>'aaa', 'b'=>'bbb', 'c'=>'ccc', ), 'b');
 *
 * echo form_select('aaa', array('a'=>'aaa', 'b'=>'bbb', 'c'=>'ccc', ), 'a');
 */


?>�组保留的标签 余下为需要删除的标签
                unset($oldtag[$key]);
            }
        }
    }
    

    if (!empty($oldtag)) {
        $tagids = array();
        foreach ($oldtag as $tagid => $tagname) {
            $tagids[] = $tagid;
        }

        well_oldtag_delete($tagids, $tid);
    }

    $r = well_tag_process($tid, $fid, $create_tag, $tagarr);

    

    return $r;
}

// 删除标签和绑定的主题
function well_oldtag_delete($tagids, $tid)
{
    

    $pagesize = count($tagids);
    $arrlist = well_tag_find_by_tagids($tagids, 1, $pagesize);

    

    $delete_tagids = array(); // 删除
    $tagids = array();
    $n = 0;
    foreach ($arrlist as $val) {
        ++$n;
        
        if (1 == $val['count']) {
            // 只有一个主题
            $delete_tagids[] = $val['tagid'];
            
        } else {
            $tagids[] = $val['tagid'];
        }
        
    }

    

    !empty($delete_tagids) and well_tag_delete($delete_tagids);

    $arlist = well_tag_thread_find_by_tid($tid, 1, $n);
    if ($arlist) {
        $ids = array();
        foreach ($arlist as $val) $ids[] = $val['id'];

        well_tag_thread_delete($ids);
    }

    !empty($tagids) and well_tag_update($tagids, array('count-' => 1));

    
}

// 标签数据处理 $arr=新提交的数组 $tagarr=保留的旧标签
function well_tag_process($tid, $fid, $new_tags = array(), $tagarr = array())
{
    if (empty($tid)) return '';

    

    // 新标签处理入库
    if ($new_tags) {

        

        $threadarr = array();
        $tagids = array();
        $i = 0;
        $size = 5;
        $n = count($tagarr);
        $n = $n > $size ? $size : $size - $n;

        

        foreach ($new_tags as $name) {
            ++$i;
            $name = trim($name);
            $name = stripslashes($name);
            $name = strip_tags($name);
            $name = str_replace(array('&nbsp;', '#', "@", "$", "%", "^", '&', '·', '<', '>', '；', '`', '~', '!', '￥', '……', ';', '?', '？', '-', '—', '_', '=', '+', '.', '{', '}', '|', ':', '：', '、', '/', '。', '[', ']', '【', '】', '‘', '	', '    ', '  ', '   ', '    '), '', $name);
            $name = htmlspecialchars($name, ENT_QUOTES);
            if ($name && $i <= $n) {
                
                // 查询标签
                $read = well_tag_read_name($name);
                
                if ($read) {
                    // 存在 count+1
                    $tagids[] = $read['tagid'];
                    
                } else {
                    // 入库
                    $arr = array('name' => $name, 'count' => 1);
                    
                    $tagid = well_tag_create($arr);
                    FALSE === $tagid and message(-1, lang('create_failed'));
                    $read = array('tagid' => $tagid, 'name' => $name);
                    
                }

                $tag_thread = array('tagid' => $read['tagid'], 'tid' => $tid);

                

                $threadarr[] = $tag_thread;

                

                $tagarr[$read['tagid']] = $read['name'];
            }
        }

        

        !empty($threadarr) and tag_thread_big_insert($threadarr);

        !empty($tagids) and well_tag_update($tagids, array('count+' => 1));
    }

    

    $json = empty($tagarr) ? '' : xn_json_encode($tagarr);

    

    return $json;
}




?>return $r;
}

/**
 * @param int $page 页数
 * @param int $pagesize 每页显示数量
 * @return mixed
 */
function link_find($page = 1, $pagesize = 100)
{
    
    $arr = link__find($cond = array(), array('rank' => -1), $page, $pagesize);
    
    return $arr;
}

/**
 * @param $id
 * @return bool 返回FALSE失败 TRUE成功
 */
function link_delete($id)
{
    if (empty($id)) return FALSE;
    
    $r = link__delete(array('id' => $id));
    link_delete_cache();
    
    return $r;
}

//--------------------------kv + cache--------------------------
/**
 * @return mixed 返回全部友情链接
 */
function link_get($page = 1, $pagesize = 100)
{
    $g_link = website_get('friends_link');
    if (empty($g_link)) {
        $g_link = link_find($page, $pagesize);
        $g_link AND website_set('friends_link', $g_link);
    }
    return $g_link;
}

// delete kv and cache
function link_delete_cache()
{
    website_set('friends_link', '');
    return TRUE;
}




?>   $v = implode(",", $v);
        $temp[] = $v;
    }
    // 去掉重复的字符串,也就是重复的一维数组
    $temp = array_unique($temp);
    // 再将拆开的数组重新组装
    $output = array();
    foreach ($temp as $k => $v) {
        if ($stkeep) $k = $starr[$k];
        if ($ndformat) {
            $temparr = explode(",", $v);
            foreach ($temparr as $ndkey => $ndval) $output[$k][$ndarr[$ndkey]] = $ndval;
        } else $output[$k] = explode(",", $v);
    }
    return $output;
}

// 合并二维数组 如重复 值以第一个数组值为准
function array2_merge($array1, $array2, $key = '')
{
    if (empty($array1) || empty($array2)) return NULL;
    $arr = array();
    foreach ($array1 as $k => $v) {
        isset($v[$key]) ? $arr[$v[$key]] = array_merge($v, $array2[$k]) : $arr[] = array_merge($v, $array2[$k]);
    }
    return $arr;
}

/*
 * 对二维数组排序 两个数组必须有一个相同的键值
 * $array1 需要排序数组
 * $array2 按照该数组key排序
 * */
function array2_sort_key($array1, $array2, $key = '')
{
    if (empty($array1) || empty($array2)) return NULL;
    $arr = array();
    foreach ($array2 as $k => $v) {
        if (isset($v[$key]) && $v[$key] == $array1[$v[$key]][$key]) {
            $arr[$v[$key]] = $array1[$v[$key]];
        } else {
            $arr[] = $v;
        }
    }

    return $arr;
}




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<h2>电子学会青少年软件编程 Python编程等级考试三级真题解析(选择题)2021年6月</h2>
<p></p> 
<p></p> 
<h2>2021年6月Python编程等级考试三级真题解析</h2> 
<h3>选择题（共25题，每题2分，共50分）</h3> 
<p><strong>1、关于open()函数的参数，下列描述正确的是</strong></p> 
<p>A、'w+'以十六进制格式打开一个文件只用于写入</p> 
<p>B、'r+'打开一个文件用于读写。文件指针将会放在文件的末尾</p> 
<p>C、'w'打开一个文件只用于写入。如果该文件已存在则打开文件，并从原有位置开始编辑，即保留原有内容。如果该文件不存在，创建新文件</p> 
<p>D、'r'以只读方式打开文件，文件的指针将会放在文件的开头</p> 
<p></p> 
<p><strong>答案：D</strong></p> 
<p><strong>考点分析：</strong>考查open函数，open函数是打开相应的文件，右多种不同的打开参数，</p> 
<p>"r" &nbsp;以只读方式打开文件。文件的指针将会放在文件的开头。这是默认模式。</p> 
<p>"r+"打开一个文件用于读写。文件指针将会放在文件的开头。</p> 
<p>"w" 打开一个文件只用于写入。如果该文件已存在则打开文件，并从开头开始编辑，即原有内容会被删除。如果该文</p><p class="tag">
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