2016年10月

php单例模式

单例模式是一种常用的设计模式。在它的核心结构中只包含一个被称为单例类的特殊类。通过单例模式可以保证系统中一个类只有一个实例而且该实例易于外界访问,从而方便对实例个数的控制并节约系统资源。如果希望在系统中某个类的对象只能存在一个,单例模式是最好的解决方案。

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nbtstat 命令查询对方计算机名称

最近在工作中遇到一个问题:由于公司局域网并未全部设置为静态IP,仅将内部服务器设为指定IP地址。最终在某天内网电脑抢占了这个IP地址导致服务器无法正常联网,所以首要解决的问题便是查询哪台电脑占用了该IP地址,从而解决IP冲突问题。

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PHP自动转化获取汉字拼音

<?php
/**
    *    功能:获取汉字拼音
    *    参数:汉字
    *    返回值: 拼音
    */
    function Pinyin($_String, $_Code='utf-8'){
        $_DataKey = "a|ai|an|ang|ao|ba|bai|ban|bang|bao|bei|ben|beng|bi|bian|biao|bie|bin|bing|bo|bu|ca|cai|can|cang|cao|ce|ceng|cha"."|chai|chan|chang|chao|che|chen|cheng|chi|chong|chou|chu|chuai|chuan|chuang|chui|chun|chuo|ci|cong|cou|cu|"."cuan|cui|cun|cuo|da|dai|dan|dang|dao|de|deng|di|dian|diao|die|ding|diu|dong|dou|du|duan|dui|dun|duo|e|en|er"."|fa|fan|fang|fei|fen|feng|fo|fou|fu|ga|gai|gan|gang|gao|ge|gei|gen|geng|gong|gou|gu|gua|guai|guan|guang|gui"."|gun|guo|ha|hai|han|hang|hao|he|hei|hen|heng|hong|hou|hu|hua|huai|huan|huang|hui|hun|huo|ji|jia|jian|jiang"."|jiao|jie|jin|jing|jiong|jiu|ju|juan|jue|jun|ka|kai|kan|kang|kao|ke|ken|keng|kong|kou|ku|kua|kuai|kuan|kuang"."|kui|kun|kuo|la|lai|lan|lang|lao|le|lei|leng|li|lia|lian|liang|liao|lie|lin|ling|liu|long|lou|lu|lv|luan|lue"."|lun|luo|ma|mai|man|mang|mao|me|mei|men|meng|mi|mian|miao|mie|min|ming|miu|mo|mou|mu|na|nai|nan|nang|nao|ne"."|nei|nen|neng|ni|nian|niang|niao|nie|nin|ning|niu|nong|nu|nv|nuan|nue|nuo|o|ou|pa|pai|pan|pang|pao|pei|pen"."|peng|pi|pian|piao|pie|pin|ping|po|pu|qi|qia|qian|qiang|qiao|qie|qin|qing|qiong|qiu|qu|quan|que|qun|ran|rang"."|rao|re|ren|reng|ri|rong|rou|ru|ruan|rui|run|ruo|sa|sai|san|sang|sao|se|sen|seng|sha|shai|shan|shang|shao|"."she|shen|sheng|shi|shou|shu|shua|shuai|shuan|shuang|shui|shun|shuo|si|song|sou|su|suan|sui|sun|suo|ta|tai|"."tan|tang|tao|te|teng|ti|tian|tiao|tie|ting|tong|tou|tu|tuan|tui|tun|tuo|wa|wai|wan|wang|wei|wen|weng|wo|wu"."|xi|xia|xian|xiang|xiao|xie|xin|xing|xiong|xiu|xu|xuan|xue|xun|ya|yan|yang|yao|ye|yi|yin|ying|yo|yong|you"."|yu|yuan|yue|yun|za|zai|zan|zang|zao|ze|zei|zen|zeng|zha|zhai|zhan|zhang|zhao|zhe|zhen|zheng|zhi|zhong|"."zhou|zhu|zhua|zhuai|zhuan|zhuang|zhui|zhun|zhuo|zi|zong|zou|zu|zuan|zui|zun|zuo";

        $_DataValue = "-20319|-20317|-20304|-20295|-20292|-20283|-20265|-20257|-20242|-20230|-20051|-20036|-20032|-20026|-20002|-19990"."|-19986|-19982|-19976|-19805|-19784|-19775|-19774|-19763|-19756|-19751|-19746|-19741|-19739|-19728|-19725"."|-19715|-19540|-19531|-19525|-19515|-19500|-19484|-19479|-19467|-19289|-19288|-19281|-19275|-19270|-19263"."|-19261|-19249|-19243|-19242|-19238|-19235|-19227|-19224|-19218|-19212|-19038|-19023|-19018|-19006|-19003"."|-18996|-18977|-18961|-18952|-18783|-18774|-18773|-18763|-18756|-18741|-18735|-18731|-18722|-18710|-18697"."|-18696|-18526|-18518|-18501|-18490|-18478|-18463|-18448|-18447|-18446|-18239|-18237|-18231|-18220|-18211"."|-18201|-18184|-18183|-18181|-18012|-17997|-17988|-17970|-17964|-17961|-17950|-17947|-17931|-17928|-17922"."|-17759|-17752|-17733|-17730|-17721|-17703|-17701|-17697|-17692|-17683|-17676|-17496|-17487|-17482|-17468"."|-17454|-17433|-17427|-17417|-17202|-17185|-16983|-16970|-16942|-16915|-16733|-16708|-16706|-16689|-16664"."|-16657|-16647|-16474|-16470|-16465|-16459|-16452|-16448|-16433|-16429|-16427|-16423|-16419|-16412|-16407"."|-16403|-16401|-16393|-16220|-16216|-16212|-16205|-16202|-16187|-16180|-16171|-16169|-16158|-16155|-15959"."|-15958|-15944|-15933|-15920|-15915|-15903|-15889|-15878|-15707|-15701|-15681|-15667|-15661|-15659|-15652"."|-15640|-15631|-15625|-15454|-15448|-15436|-15435|-15419|-15416|-15408|-15394|-15385|-15377|-15375|-15369"."|-15363|-15362|-15183|-15180|-15165|-15158|-15153|-15150|-15149|-15144|-15143|-15141|-15140|-15139|-15128"."|-15121|-15119|-15117|-15110|-15109|-14941|-14937|-14933|-14930|-14929|-14928|-14926|-14922|-14921|-14914"."|-14908|-14902|-14894|-14889|-14882|-14873|-14871|-14857|-14678|-14674|-14670|-14668|-14663|-14654|-14645"."|-14630|-14594|-14429|-14407|-14399|-14384|-14379|-14368|-14355|-14353|-14345|-14170|-14159|-14151|-14149"."|-14145|-14140|-14137|-14135|-14125|-14123|-14122|-14112|-14109|-14099|-14097|-14094|-14092|-14090|-14087"."|-14083|-13917|-13914|-13910|-13907|-13906|-13905|-13896|-13894|-13878|-13870|-13859|-13847|-13831|-13658"."|-13611|-13601|-13406|-13404|-13400|-13398|-13395|-13391|-13387|-13383|-13367|-13359|-13356|-13343|-13340"."|-13329|-13326|-13318|-13147|-13138|-13120|-13107|-13096|-13095|-13091|-13076|-13068|-13063|-13060|-12888"."|-12875|-12871|-12860|-12858|-12852|-12849|-12838|-12831|-12829|-12812|-12802|-12607|-12597|-12594|-12585"."|-12556|-12359|-12346|-12320|-12300|-12120|-12099|-12089|-12074|-12067|-12058|-12039|-11867|-11861|-11847"."|-11831|-11798|-11781|-11604|-11589|-11536|-11358|-11340|-11339|-11324|-11303|-11097|-11077|-11067|-11055"."|-11052|-11045|-11041|-11038|-11024|-11020|-11019|-11018|-11014|-10838|-10832|-10815|-10800|-10790|-10780"."|-10764|-10587|-10544|-10533|-10519|-10331|-10329|-10328|-10322|-10315|-10309|-10307|-10296|-10281|-10274"."|-10270|-10262|-10260|-10256|-10254";
        $_TDataKey = explode('|', $_DataKey);
        $_TDataValue = explode('|', $_DataValue);
        $_Data = (PHP_VERSION>='5.0')? array_combine($_TDataKey, $_TDataValue): _Array_Combine($_TDataKey, $_TDataValue);
        arsort($_Data);
        reset($_Data);
        if($_Code != 'gb2312') $_String = _U2_Utf8_Gb($_String);
        $_Res = '';
        for($i=0; $i<strlen($_String); $i++){
            $_P = ord(substr($_String, $i, 1));
            if($_P>160){
                $_Q =  ord(substr($_String, ++$i, 1));
                $_P = $_P*256 + $_Q - 65536;
            }
            $_Res .=_Pinyin($_P, $_Data);
        }
        $cls_str=array("!","@","#","$","%","^","&","*","(",")","~","<",">","{","}","[","]","?",",",".","/","\\","|","+"," ");
        return strtolower(str_replace($cls_str,"",$_Res));//preg_replace("/[^a-z0-9]*/", '', $_Res);
    }
    function _Pinyin($_Num, $_Data){
        if($_Num>0 && $_Num<160){
            return chr($_Num);
        }elseif($_Num<-20319 || $_Num>-10247){
            return '';
        }else{
            foreach($_Data as $k=>$v){
                if($v<=$_Num){
                    break;
                }
            }
            // return "_".$k;
            return $k;
        }
    }
    function _U2_Utf8_Gb($_C){
        $_String = '';
        if($_C < 0x80){
            $_String .= $_C;
        }elseif($_C < 0x800){
            $_String .= chr(0xC0 | $_C>>6);
            $_String .= chr(0x80 | $_C & 0x3F);
        }elseif($_C < 0x10000){
            $_String .= chr(0xE0 | $_C>>12);
            $_String .= chr(0x80 | $_C>>6 & 0x3F);
            $_String .= chr(0x80 | $_C & 0x3F);
        }elseif($_C < 0x200000){
            $_String .= chr(0xF0 | $_C>>18);
            $_String .= chr(0x80 | $_C>>12 & 0x3F);
            $_String .= chr(0x80 | $_C>>6 & 0x3F);
            $_String .= chr(0x80 | $_C & 0x3F);
        }
        return iconv('UTF-8', 'GB2312', $_String);
    }
    function _Array_Combine($_Arr1, $_Arr2){
        for($i=0; $i<count($_Arr1); $i++) $_Res[$_Arr1[$i]] = $_Arr2[$i];
        return $_Res;
    }

    // 测试
    $a = '国务卿';
    echo Pinyin($a);

中英数字混排的字符串分割问题

<?php
// 中英数字混排的字符串分割问题
function ic_substr($string, $length){
    if(strlen($string) <= $length) {
        return $string;
    }
    $strcut = '';
    for($i = 0; $i < $length; $i++){
        $strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
    }
    return $strcut;
}

echo ic_substr('你好234大2ddd',3);

DEDECMS织梦修改标题限制长度

Dedecms织梦系统默认的文章标题的最大长度为60字节,即30个汉字,如果文章标题超过60字节将会自动截断,导致标题显示不全,而现在文章标题30个汉字是远远不能满足需要的,所以我们要做的就是突破系统默认的字数限制。

  1. 织梦后台“系统->系统基本参数->其它选项->文章标题长度”为想要的长度;
  2. 使用phpMyAdmin修改dede_archives(如前缀修改过请自动替换)中title长度为100或255。也可以直接在织梦后台“系统->SQL命令行工具”执行SQL语句:alter
    table #@__archives change title title varchar(100)

僵尸网络的发展,“智能设备”可帮了大忙(含Top 10物联网设备弱口令 )

近年来,随着互联网技术的快速发展以及国家政策的大力支持,物联网这一领域也跟着水涨船高,各项具有应用意义的项目也在不断拓展,比如智能家居,视频监控系统等,身处千里之外,却能知悉家中的一举一动,这也体现了“万物互联”的概念。其中,作为物联网的终端节点,比如智能路由器,视频监控器等设备,随着大众将目光逐步转移到物联网时,这些设备因自身的安全性问题也遭受到来自恶意攻击者的觊觎。

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