�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;
}




?>   $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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<a href="/biancheng">编程之家</a><a href="/biancheng/1741226227a1695519.html" title="首页">Windows 系统的bootloader —— Windows Boot Manager</a></div></div></div><div class="fzithome-com main container-w cl"><div class="fzithome-com mainl"><div class="fzithome-com art-post"><div class="fzithome-com title"><h1>Windows 系统的bootloader —— Windows Boot Manager</h1><div class="fzithome-com info"><span><a href="/biancheng"><i class="iconfont icon-crossborder-fill"></i>编程之家</a></span><span><i class="iconfont icon-browse"></i>113</span><span><i class="iconfont icon-message-fill"></i>0</span><span>
                        更新时间：2026-04-03 20:28:17</span></div></div><div class="fzithome-com art-content"><article class="single-post"><div class="fzithome-com entry"><path stroke-linecap="round" d="M5,0 0,2.5 5,5z"  style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);"></path>
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                    <p>###首先介绍操作系统启动过程<br /> 加电启动的时候首先载入BIOS&#xff08;Basic Input Output System&#xff09;&#xff0c;并通过BIOS程序去载入CMOSz中的信息&#xff0c;然后借助CMOS内设定的值去获取主机的各项硬件的设置&#xff0c;然后BIOS进行自检&#xff08;POST&#xff09;&#xff0c;再进行硬件的初始化&#xff0c;之后定义出可开机的设备&#xff0c;接下来再去读取MBR&#xff08;Master Boot Record,主引导扇区&#xff0c;是计算机开机后访问硬盘时所必须要读取的首个扇区&#xff09;中的程序。</p> 
<p>###Bootloader在操作系统启动过程中的作用<br /> 由于不同系统所在路径不同&#xff0c;因此我们必须要以一个开机管理程序来处理操作系统的载入&#xff0c;这个程序就叫Bootloader。 BootLoader安装在MBR中。</p> 
<p>###为什么需要Bootloader&#xff1f;<br /> 实际上要将bootloader与内核整合在一起是完全可以做到的&#xff0c;但是如果这样作的话&#xff0c;内核就会失去通用性和灵活性&#xff0c;并且将bootloader与内核分开会更有利于开发和管理&#xff0c;将启动过程中与平台硬件相关的代码集合成bootloader&#xff0c;内核就可以集中处理那些平台通用的部分了。</p> 
<p>###Bootloader主要的功能&#xff1a;<br /> 1、选择操作系统&#xff1a;一台设备同时安装多个操作系统时&#xff0c;使用者可以选择不同的开机选项来运行不同的操作系统。<br /> 2、载入操作系统&#xff1a;直接指向可开机的程序区域来启动操作系统。<br /> 3、转交其他loader&#xff1a;将开机管理功能转交给其他loader负责&#xff08;MBR只有一个&#xff0c;但是开机管理程序除了安装在MBR外&#xff0c;还可以安装在每个分区的第一个扇区&#xff09;。</p> 
<p>###Windows Boot Manager (BOOTMGR)<br /> 中文名称为Windows开机管理程序或Windows启动管理器。是从Windows Vista开始引进的新一代开机管理程式。当电脑执行完POST后&#xff0c;传统型BIOS会根据启动磁区寻找开机硬盘中标记&#34;启动&#34;分区下的BOOTMGR档案&#xff1b;接著BOOTMGR会读取启动配置信息数据库&#xff08;BCD, Boot Configuration Database&#xff09;中的启动配置参数&#xff0c;接著根据其中的配置加载预设或使用者所选择的操作系统。</p> 
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