B/S项目阶段小总结
2012-08-05 22:25
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最近在做一个B/S的小项目,由于是第一次个人接触这个类型的,过程中难免磕磕绊绊,做个阶段总结,将一些基础的知识点归纳一下。
1. HTML网页基本格式
其中带前下划线的是在IE6下做的特殊处理
objtb.childNodes[0] 取到表
objtb.childNodes[0].childNodes[i] 取到行
objtb.childNodes[0].childNodes[i].childNodes[j] 取到列
objtb.childNodes[0].childNodes[i].childNodes[j].childNodes[k] 取到列里面的控件
补充:从里往外取的话 obj.parentNode.parentNode
推荐方式:
objtb.rows.length 获取表中的行数
objtb.rows[i].cells.length 获取第(i+1)行的列数
objtb.rows[i].cells[j].childNodes.length 获取第(i+1)行,第(j+1)列中的控件个数
objtb.rows[i].cells[j].childNodes[k] 通过索引定位到某个控件
解决方法:
② new Option(para1,para2)中para1表示界面显示的文本,para2表示实际值
在使用界面导入add_ajax.js
注意:IE6下上述代码中this会是一个未定义的值,代码要改为
注意:在json.js中有这么一处说明,
object.toJSONString(whitelist)
This method produce a JSON text from a JavaScript value.
It must not contain any cyclical references. Illegal values
will be excluded.
它不允许在页面中出现循环赋值的语句,即当出现上面第3点(页面加载时用js数组值循环为select控件赋值)时,select的option列表会加载意外选项值。
暂时补救措施,手动删除意外option选项
如果js数组转为json格式后是为PHP服务,在PHP处需要用json_decode()函数先将json转为php中可用的数据格式。
4. PHP 正则表达式截取过滤
一. HTML部分
1. HTML网页基本格式
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="mystyle.css" /> <!--引入css样式文件--> <script src="js/add_ajax.js" type="text/javascript" charset="UTF-8"></script> <!--引入js文件--> <link rel="shortcut icon" type="image/x-icon" href="img/izhongyi.ico" media="screen" /> <!--设置图标--> <title></title> <script type="text/javascript"> // code </script> </head> <body> <!-- code--> </body> </html>
2. 设置body紧贴页面的左边和上边
<body style="margin-top:0px;margin-left:0px"> </body>
3. table单元格间无缝拼接
<table cellpadding="0px" cellspacing="0px"></table>table本身是有单元格间距与内边距的,如果使各单元格无缝拼接,需手动设置cellpadding属性和cellspacing属性。
4. 当鼠标离开控件焦点时触发事件
<input type="text" onblur="fun1()">
5. 设置div固定在界面中不随界面滚动而移动
<style type="text/css"> .optwnd { padding:5px; position:fixed; _position:absolute; top:10%; right:50px; _top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight-(parseInt(this.currentStyle.marginTop,10)||0)-(parseInt(this.currentStyle.marginBottom,10)||0))); } </style> <div class="optwnd"> </div>
其中带前下划线的是在IE6下做的特殊处理
6. 表中行的有关操作
<script type="text/javascript"> function fun(obj) // obj为表中单元格中的控件,可以通过fun(this)调用此函数 { var objTable = document.getElementById('cmtb'); // cmtb为table的id var rowsNum = objTable.rows.length; // 表中行数 var row = obj.parentNode.parentNode; // 获取控件所在行 var index = row.rowIndex; // 获取行索引 objTable.deleteRow(index); // 删除该行 } </script>
7. 利用childNodes遍历表中元素
设objtb表示取到的table,objtb.rows.length 取的是表的行数objtb.childNodes[0] 取到表
objtb.childNodes[0].childNodes[i] 取到行
objtb.childNodes[0].childNodes[i].childNodes[j] 取到列
objtb.childNodes[0].childNodes[i].childNodes[j].childNodes[k] 取到列里面的控件
补充:从里往外取的话 obj.parentNode.parentNode
推荐方式:
objtb.rows.length 获取表中的行数
objtb.rows[i].cells.length 获取第(i+1)行的列数
objtb.rows[i].cells[j].childNodes.length 获取第(i+1)行,第(j+1)列中的控件个数
objtb.rows[i].cells[j].childNodes[k] 通过索引定位到某个控件
8. 去掉li样式前面的小点
style="list-style-type:none;"9. <img>外套一层<a>后图片周围会有篮框
这是因为图片有超链接(即img标签外有a标签),图片链接的蓝框和文字链接的下划线含义相似。解决方法:
<img src="img/aa.jpg" border=none>
10. 不使用超链接,鼠标移到图片上变成手型
<img style="cursor:hand" src="URL">
二. javascript部分
1. 在新标签页中打开网页
window.open('abc.php');
2. 设置html标签的class属性
取到标签ID,然后 .setAttribute("class", 定义的class名称);3. 页面加载时用js数组值循环为select控件赋值
<script type="text/javascript"> onload = function() { var arr = new Array("AA","BB","CC"); for (var x in arr) { document.getElementById("selid").options.add(new Option(arr[x],arr[x])); } } </script>补充:① new Option中Option的首字母要大写
② new Option(para1,para2)中para1表示界面显示的文本,para2表示实际值
4. 邮箱格式验证
function isEmail(str) { var emailstr = str; var reg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/; if (reg.test(emailstr) != true) { alert(邮箱格式不正确); } }
5. 身份证号码验证
function verifyIdNumber(str) { var verifyObj = new verifyAlgorithm(); var idnumber = str; verifyObj.init(idnumber); var ret = verifyObj.verify(); if (ret != true) { alert(ret); } } var verifyAlgorithm = function() { var idNumber = ''; var _generateValidateCode = function( cardNumber ) { var arrVerifyCode = [ 1 , 0 , "x" , 9 , 8 , 7 , 6 , 5 , 4 , 3 , 2 ]; var Wi = [ 7 , 9 , 10 , 5 , 8 , 4 , 2 , 1 , 6 , 3 , 7 , 9 , 10 , 5 , 8 , 4 , 2 ]; for( var i = 0 , ret = 0 ; i < 17 ; i++ ) { ret += cardNumber.charAt( i ) * Wi[i]; } return arrVerifyCode[ret % 11]; }; var _convertID2Eighteen = function( cardNumber ) { return cardNumber.slice( 0 , 6 ) + "19" + cardNumber.slice( 6 , 16 ) + _generateValidateCode( cardNumber.slice( 0 , 6 ) + "19" + cardNumber.slice( 6 , 16 ) ); }; this.init = function(personId) { this.idNumber = personId.length == 15 ? _convertID2Eighteen( personId ) : personId; this.idNumber = this.idNumber.toLowerCase(); }; this.verify = function() { if( this.idNumber.length != 15 && this.idNumber.length != 18) { return "身份证号共有 15位或18位"; } if( !/^\d+$/.test( this._getSeventeenNumber() ) ) { return "身份证除最后一位外,必须为数字!"; } if( this._getDateObject().getFullYear() != this._getYear() || this._getDateObject().getMonth() != this._getMonth() - 1 || this._getDateObject().getDate() != this._getDay() || this._getDateObject() > ( new Date() ) ) { return "身份证输入日期错误!"; } if( this._getValidateCode() != _generateValidateCode( this.idNumber ) ) { return "身份证验证码错误"; } return true; }; this._getYear = function() { return this.idNumber.slice( 6 , 10 ); } this._getMonth = function() { return this.idNumber.slice( 10 , 12 ); } this._getDay = function() { return this.idNumber.slice( 12 , 14 ); } this._getDateObject = function() { return new Date( this._getYear() , this._getMonth() - 1 , this._getDay() ); } this._getSeventeenNumber = function() { return this.idNumber.substring( 0 , 17 ); }; this._getValidateCode = function() { return this.idNumber.slice( 17 , 18 ); } }
6. 日期控件
<script type="text/javascript"> var gMonths=new Array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月"); var WeekDay=new Array("日","一","二","三","四","五","六"); var strToday="今天"; var strYear="年"; var strMonth="月"; var strDay="日"; var splitChar="-"; var startYear=1900; var endYear=new Date().getUTCFullYear();//终止年份(当前年份) var dayTdHeight=12; var dayTdTextSize=12; var gcNotCurMonth="#E0E0E0"; var gcRestDay="#FF0000"; var gcWorkDay="#444444"; var gcMouseOver="#79D0FF"; var gcMouseOut="#F4F4F4"; var gcToday="#444444"; var gcTodayMouseOver="#6699FF"; var gcTodayMouseOut="#79D0FF"; var gdCtrl=new Object(); var goSelectTag=new Array(); var gdCurDate=new Date(); var giYear=gdCurDate.getFullYear(); var giMonth=gdCurDate.getMonth()+1; var giDay=gdCurDate.getDate(); function $(){var elements=new Array();for(var i=0;i<arguments.length;i++) {var element=arguments[i];if(typeof(arguments[i])=='string'){element=document.getElementById(arguments[i]);}if(arguments.length==1){return element;}elements.Push(element);}return elements;} Array.prototype.Push=function(){var startLength=this.length;for(var i=0;i<arguments.length;i++){this[startLength+i]=arguments[i];}return this.length;} String.prototype.HexToDec=function(){return parseInt(this,16);} String.prototype.cleanBlank=function(){return this.isEmpty()?"":this.replace(/\s/g,"");} function checkColor(){var color_tmp=(arguments[0]+"").replace(/\s/g,"").toUpperCase();var model_tmp1=arguments[1].toUpperCase();var model_tmp2="rgb("+arguments[1].substring(1,3).HexToDec()+","+arguments[1].substring(1,3).HexToDec()+","+arguments[1].substring(5).HexToDec()+")";model_tmp2=model_tmp2.toUpperCase();if(color_tmp==model_tmp1 ||color_tmp==model_tmp2){return true;}return false;} function $V(){return $(arguments[0]).value;} function fPopCalendar(evt,popCtrl,dateCtrl){evt.cancelBubble=true;gdCtrl=dateCtrl;fSetYearMon(giYear,giMonth);var point=fGetXY(popCtrl);with($("calendardiv").style){left=point.x+"px";top=(point.y+popCtrl.offsetHeight+1)+"px";visibility='visible';zindex='99';position='absolute';}$("calendardiv").focus();} function fSetDate(iYear,iMonth,iDay){var iMonthNew=new String(iMonth);var iDayNew=new String(iDay);if(iMonthNew.length<2){iMonthNew="0"+iMonthNew;}if(iDayNew.length<2){iDayNew="0"+iDayNew;}gdCtrl.value=iYear+splitChar+iMonthNew+splitChar+iDayNew;fHideCalendar();} function fHideCalendar(){$("calendardiv").style.visibility="hidden";for(var i=0;i<goSelectTag.length;i++){goSelectTag[i].style.visibility="visible";}goSelectTag.length=0;} function fSetSelected(){var iOffset=0;var iYear=parseInt($("tbSelYear").value);var iMonth=parseInt($("tbSelMonth").value);var aCell=$("cellText"+arguments[0]);aCell.bgColor=gcMouseOut;with(aCell){var iDay=parseInt(innerHTML);if(checkColor(style.color,gcNotCurMonth)){iOffset=(innerHTML>10)?-1:1;}iMonth+=iOffset;if(iMonth<1){iYear--;iMonth=12;}else if(iMonth>12){iYear++;iMonth=1;}}fSetDate(iYear,iMonth,iDay);} function Point(iX,iY){this.x=iX;this.y=iY;} function fBuildCal(iYear,iMonth){var aMonth=new Array();for(var i=1;i<7;i++){aMonth[i]=new Array(i);}var dCalDate=new Date(iYear,iMonth-1,1);var iDayOfFirst=dCalDate.getDay();var iDaysInMonth=new Date(iYear,iMonth,0).getDate();var iOffsetLast=new Date(iYear,iMonth-1,0).getDate()-iDayOfFirst+1;var iDate=1;var iNext=1;for(var d=0;d<7;d++){aMonth[1][d]=(d<iDayOfFirst)?(iOffsetLast+d)*(-1):iDate++;}for(var w=2;w<7;w++){for(var d=0;d<7;d++){aMonth[w][d]=(iDate<=iDaysInMonth)?iDate++:(iNext++)*(-1);}}return aMonth;} function fDrawCal(iYear,iMonth,iCellHeight,iDateTextSize){var colorTD=" bgcolor='"+gcMouseOut+"' bordercolor='"+gcMouseOut+"'";var styleTD=" valign='middle' align='center' style='height:"+iCellHeight+"px;font-weight:bolder;font-size:"+iDateTextSize+"px;";var dateCal="";dateCal+="<tr>";for(var i=0;i<7;i++){dateCal+="<td"+colorTD+styleTD+"color:#990099'>"+WeekDay[i]+"</td>";}dateCal+="</tr>";for(var w=1;w<7;w++){dateCal+="<tr>";for(var d=0;d<7;d++){var tmpid=w+""+d;dateCal+="<td"+styleTD+"cursor:pointer;' onclick='fSetSelected("+tmpid+")'>";dateCal+="<span id='cellText"+tmpid+"'></span>";dateCal+="</td>";}dateCal+="</tr>";}return dateCal;} function fUpdateCal(iYear,iMonth){var myMonth=fBuildCal(iYear,iMonth);var i=0;for(var w=1;w<7;w++){for(var d=0;d<7;d++){with($("cellText"+w+""+d)){parentNode.bgColor=gcMouseOut;parentNode.borderColor=gcMouseOut;parentNode.onmouseover=function(){this.bgColor=gcMouseOver;};parentNode.onmouseout=function(){this.bgColor=gcMouseOut;};if(myMonth[w][d]<0){style.color=gcNotCurMonth;innerHTML=Math.abs(myMonth[w][d]);}else{style.color=((d==0)||(d==6))?gcRestDay:gcWorkDay;innerHTML=myMonth[w][d];if(iYear==giYear && iMonth==giMonth && myMonth[w][d]==giDay){style.color=gcToday;parentNode.bgColor=gcTodayMouseOut;parentNode.onmouseover=function(){this.bgColor=gcTodayMouseOver;};parentNode.onmouseout=function(){this.bgColor=gcTodayMouseOut;};}}}}}} function fSetYearMon(iYear,iMon){$("tbSelMonth").options[iMon-1].selected=true;for(var i=0;i<$("tbSelYear").length;i++){if($("tbSelYear").options[i].value==iYear){$("tbSelYear").options[i].selected=true;}}fUpdateCal(iYear,iMon);} function fPrevMonth(){var iMon=$("tbSelMonth").value;var iYear=$("tbSelYear").value;if(--iMon<1){iMon=12;iYear--;}fSetYearMon(iYear,iMon);} function fNextMonth(){var iMon=$("tbSelMonth").value;var iYear=$("tbSelYear").value;if(++iMon>12){iMon=1;iYear++;}fSetYearMon(iYear,iMon);} function fGetXY(aTag){var oTmp=aTag;var pt=new Point(0,0);do{pt.x+=oTmp.offsetLeft;pt.y+=oTmp.offsetTop;oTmp=oTmp.offsetParent;}while(oTmp.tagName.toUpperCase()!="BODY");return pt;} function getDateDiv(){var noSelectForIE="";var noSelectForFireFox="";if(document.all){noSelectForIE="onselectstart='return false;'";}else{noSelectForFireFox="-moz-user-select:none;";}var dateDiv="";dateDiv+="<div id='calendardiv' onclick='event.cancelBubble=true' "+noSelectForIE+" style='"+noSelectForFireFox+"position:absolute;z-index:99;visibility:hidden;border:1px solid #999999;'>";dateDiv+="<table border='0' bgcolor='#E0E0E0' cellpadding='1' cellspacing='1' >";dateDiv+="<tr>";dateDiv+="<td><input type='button' id='PrevMonth' value='<' style='height:20px;width:20px;font-weight:bolder;' onclick='fPrevMonth()'>";dateDiv+="</td><td><select id='tbSelYear' style='border:1px solid;' onchange='fUpdateCal($V(\"tbSelYear\"),$V(\"tbSelMonth\"))'>";for(var i=startYear;i<=endYear;i++){dateDiv+="<option value='"+i+"'>"+i+strYear+"</option>";}dateDiv+="</select></td><td>";dateDiv+="<select id='tbSelMonth' style='border:1px solid;' onchange='fUpdateCal($V(\"tbSelYear\"),$V(\"tbSelMonth\"))'>";for(var i=0;i<12;i++){dateDiv+="<option value='"+(i+1)+"'>"+gMonths[i]+"</option>";}dateDiv+="</select></td><td>";dateDiv+="<input type='button' id='NextMonth' value='>' style='height:20px;width:20px;font-weight:bolder;' onclick='fNextMonth()'>";dateDiv+="</td>";dateDiv+="</tr><tr>";dateDiv+="<td align='center' colspan='4'>";dateDiv+="<div style='background-color:#cccccc'><table width='100%' border='0' cellpadding='3' cellspacing='1'>";dateDiv+=fDrawCal(giYear,giMonth,dayTdHeight,dayTdTextSize);dateDiv+="</table></div>";dateDiv+="</td>";dateDiv+="</tr><tr><td align='center' colspan='4' nowrap>";dateDiv+="<span style='cursor:pointer;font-weight:bolder;' onclick='fSetDate(giYear,giMonth,giDay)' onmouseover='this.style.color=\""+gcMouseOver+"\"' onmouseout='this.style.color=\"#000000\"'>"+strToday+":"+giYear+strYear+giMonth+strMonth+giDay+strDay+"</span>";dateDiv+="</tr></tr>";dateDiv+="</table></div>";return dateDiv;} with(document){onclick=fHideCalendar;write(getDateDiv());} </script>
出生日期:<input type="text" onclick="fPopCalendar(event,this,this)" onfocus="this.select()" readonly>
7. js去除空格
//去除字符串中间空格 String.prototype.Trim = function() { return this.replace(/(^\s*)|(\s*$)/g, ""); } //去除字符串左侧空格 String.prototype.LTrim = function() { return this.replace(/(^\s*)/g, ""); } //去除字符串右侧空格 String.prototype.RTrim = function() { return this.replace(/(\s*$)/g, ""); } // 去除空格 function trimRtn(strparam) { var str = strparam.Trim(); str = str.LTrim(); str = str.RTrim(); return str; }
8. 设置table间隔行的底色(参数传入table标签的id)
function setTrBgColor(str) { var objTable = document.getElementById(str); var rowscnt = objTable.rows.length; for (var i=0;i<rowscnt;++i) { if (i%2==0) { objTable.childNodes[0].childNodes[i].setAttribute("class", "alt"); // alt为css一设置属性 } } }
9. 判断js数组中是否包含某值
<script type="text/javascript"> // 判断元素是否在数组内并返回索引 Array.prototype.contains = function(obj) { var i = this.length; while (i--) { if (this[i] === obj) { return i; } } return -1; } var arr = new Array("AA","BB","CC"); var str = "BB"; var idx = arr.contains(str); // 返回str在数组arr中的索引,如果没找到则返回-1 </script>
10. 改变select控件option列表宽度
<script type="text/javascript"> function FixWidth(selectObj) { var newSelectObj = document.createElement("select"); newSelectObj = selectObj.cloneNode(true); newSelectObj.selectedIndex = selectObj.selectedIndex; newSelectObj.onmouseover = null; var e = selectObj; var absTop = e.offsetTop; var absLeft = e.offsetLeft; while(e = e.offsetParent) { absTop += e.offsetTop; absLeft += e.offsetLeft; } with (newSelectObj.style) { position = "absolute"; top = absTop + "px"; left = absLeft + "px"; width = "auto"; } var rollback = function(){ RollbackWidth(selectObj, newSelectObj); }; if(window.addEventListener) { newSelectObj.addEventListener("blur", rollback, false); newSelectObj.addEventListener("change", rollback, false); } else { newSelectObj.attachEvent("onblur", rollback); newSelectObj.attachEvent("onchange", rollback); } selectObj.style.visibility = "hidden"; document.body.appendChild(newSelectObj); newSelectObj.focus(); } function RollbackWidth(selectObj, newSelectObj) { selectObj.selectedIndex = newSelectObj.selectedIndex; selectObj.style.visibility = "visible"; document.body.removeChild(newSelectObj); } </script>
<select id="formulaeSel" onmouseover="FixWidth(this)"> <option value=""/> </select>
11. js截取字符串中的字符部分或数字部分
<script type="text/javascript"> var idCtrl = "text123"; var str1 = idCtrl.replace(/[^a-z]+/ig,""); // 截取字符部分,str1为text var str2 = idCtrl.replace(/[^0-9]+/ig,""); // 截取数字部分,str2为123 </script>
12. js + ajax
add_ajax.jsfunction create_ajax() { var http_request=false; if(window.XMLHttpRequest) { http_request=new XMLHttpRequest(); if(http_request.overrideMimeType) { http_request.overrideMimeType('text/html'); } } else if(window.ActiveXObject) { try { http_request=new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) { try { http_request=new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) { http_request = false; } } } if(!http_request) { alert("您正在使用不支持AJAX的浏览器\n初始化失败"); } else { http_request.onreadystatechange=function() { }; } return http_request; } function if_init(http_request) { if(!http_request) { alert("AJAX未初始化"); return false; } return true; } function send_get(http_request,url) { if(if_init(http_request)) { http_request.open("GET",url,true); http_request.send(null); return true; } return false; } function send_post(http_request,url,post) { if(if_init(http_request)) { http_request.open("POST",url,true); http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); http_request.send(post); return true; } return false; }
在使用界面导入add_ajax.js
<script src="js/add_ajax.js" type="text/javascript" charset="UTF-8"></script>
<script type="text/javascript"> var info = "value="+param1; var link_request = create_ajax(); if (link_request) { link_request.onreadystatechange=function() { if(this.readyState==4) { if(this.status==200) { var retVal = this.responseText; // retVal是test.php处理后(echo)返回的值 // code } } } send_post(link_request,"ajax/test.php",info); } </script>
注意:IE6下上述代码中this会是一个未定义的值,代码要改为
<script type="text/javascript"> var info = "value="+param1; var link_request = create_ajax(); if (link_request) { link_request.onreadystatechange=function() { if(link_request.readyState==4) { if(link_request.status==200) { var retVal = link_request.responseText; // retVal是test.php处理后(echo)返回的值 // code } } } send_post(link_request,"ajax/test.php",info); } </script>
13. js数组转为json
使用界面需要先导入json.js,然后调用 js数组.toJSONString()注意:在json.js中有这么一处说明,
object.toJSONString(whitelist)
This method produce a JSON text from a JavaScript value.
It must not contain any cyclical references. Illegal values
will be excluded.
它不允许在页面中出现循环赋值的语句,即当出现上面第3点(页面加载时用js数组值循环为select控件赋值)时,select的option列表会加载意外选项值。
暂时补救措施,手动删除意外option选项
function removeop(id) // id传入select控件的id { var obj = document.getElementById(id); for (var k = obj.length - 1; k > 0; k--) { if (obj.options[k].text == "" || obj.options[k].text.indexOf("function") >= 0) obj.remove(k); } }
如果js数组转为json格式后是为PHP服务,在PHP处需要用json_decode()函数先将json转为php中可用的数据格式。
三. PHP部分
1. PHP代码调用js函数
<?php echo "<script language='javascript'>func1(param1)</script>"; ?>
2. PHP数组转为json数组后在js中可以直接使用
<?php $arr = array("name"=>"jaly","age"=>19); $arr = json_encode($arr); ?>
<script type="text/javascript"> var arr = <?php echo $arr;?>; document.getElementById("nameCon").value = arr.name; document.getElementById("ageCon").value = arr.age; </script>
3. form在submit之后在本页处理
(1)<form name="inquire" action="<?php echo $_SERVER['PHP_SELF'];?>" method='POST'>(2)
<input type="hidden" name="action" value="submitted"/> <input type="submit" value="查询" />(3)
<?php if (isset($_POST['action']) && $_POST['action']=='submitted') { // code } ?>
4. PHP 正则表达式截取过滤
<?php $idCtrl = "text123"; $str1 = preg_replace('/^([a-z]+).*/i', '$1', $idCtrl); // 截取字符部分,str1为text $str2 = preg_replace("/[^0-9]/i","",$idCtrl); // 截取数字部分,str2为123 $test = "te56est12"; $txt1 = preg_replace('/^([a-z]+).*/i', '$1', $test); // 截取字符部分,txt1为te $txt2 = preg_replace("/[^0-9]/i","",$test); // 截取数字部分,txt2为5612 $idTmp = "text123ab"; $str3 = preg_replace('/[^a-z]/i', '', $idTmp); // 截取所有字符,str3为textab preg_match_all('/[\x{4e00}-\x{9fff}]+/u', $name, $matches); // $name可为包含汉字,数字,字母,字符等内容的字符串 $str = join('', $matches[0]); // $str现在为$name中只包含汉字的字符串 ?>
5. PHP计算包含汉字的字符串长度
$strLen = mb_strlen($str,"UTF8"); // 这样计算中一个汉字被当做一个长度处理
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