基于html5的sse推送实现在线聊天
HTML5 服务器推送事件（Server-sent Events） 利用html5的及时推送技术与php+mysql+ajax一些技术完成一款在线聊天室实例。sse推送默认为3秒时间，echo "retry:1000\n"来修改为1s，基础代码：
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。
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。
PHP实现 数字转人民币金额大写
以下位PHP版转换代码：
function numToRmb($num) {
$c1 = "零壹贰叁肆伍陆柒捌玖";
$c2 = "分角元拾佰仟万拾佰仟亿";
//精确到分后面就不要了，所以只留两个小数位
$num = round($num, 2);
//将数字转化为整数
$num = $num * 100;
if (strlen($num) > 10) {
return "金额太大，请检查";
}
$i = 0;
$c = "";
while (1) {
if ($i == 0) {
//获取最后一位数字
$n = substr($num, strlen($num) - 1, 1);
} else {
$n = $num % 10;
} //每次将最后一位数字转化为中文
$p1 = substr($c1, 3 * $n, 3);
$p2 = substr($c2, 3 * $i, 3);
if ($n != '0' || ($n == '0' && ($p2 == '亿' || $p2 == '万' || $p2 == '元'))) {
$c = $p1 . $p2 . $c;
} else {
$c = $p1 . $c;
}
$i = $i + 1;
//去掉数字最后一位了
$num = $num / 10;
$num = (int) $num;
//结束循环
if ($num == 0) {
break;
}
}
$j = 0;
$slen = strlen($c);
while ($j < $slen) {
//utf8一个汉字相当3个字符
$m = substr($c, $j, 6);
//处理数字中很多0的情况,每次循环去掉一个汉字“零”
if ($m == '零元' || $m == '零万' || $m == '零亿' || $m == '零零') {
$left = substr($c, 0, $j);
$right = substr($c, $j + 3);
$c = $left . $right;
$j = $j - 3;
$slen = $slen - 3;
}
$j = $j + 3;
}
//这个是为了去掉类似23.0中最后一个“零”字
if (substr($c, strlen($c) - 3, 3) == '零') {
$c = substr($c, 0, strlen($c) - 3);
}
//将处理的汉字加上“整”
if (empty($c)) {
return "零元整";
} else {
return $c . "整";
}
}PHP自动转化获取汉字拼音
<?php
/**
* 功能：获取汉字拼音
* 参数：汉字
* 返回值: 拼音
*/
function Pinyin($_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);Yii2.0 rules验证规则集合
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。
- 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；
- 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)