


1. Implementation code for default selection of radio, checkbox and php select
1. Implementation of default selection of radio radio button
Code example:
<input type="radio" name="dishu" value="3" <?php if($myrow[dishu]==3) echo("checked");?>>空白 <input type="radio" name="dishu" value="1" <?php if($myrow[dishu]==1) echo("checked");?>>出让 <input type="radio" name="dishu" value="2" <?php if($myrow[dishu]==2) echo("checked");?>>划拨 <input type="radio" name="dishu" value="4" <?php if($myrow[dishu]==4) echo("checked");?>>集体
2. The default selection of the checkbox checkbox is implemented
Code example:
<input name="fujia_jiaju" type="checkbox" value="jiaju" <?php if($myrow[fujia_jiaju]) echo("checked");?>> </font></strong>家 具</td> <td width="108" height="1"><strong><font color="#008080" face="楷体_GB2312"> <input name="fujia_chuju" type="checkbox" value="chuju" <?php if($myrow[fujia_chuju]) echo("checked");?>> </font></strong>厨 具</td> <td width="96" height="1"><strong><font color="#008080" face="楷体_GB2312"> <input name="fujia_woju" type="checkbox" value="woju" <?php if($myrow[fujia_woju]) echo("checked");?>> </font></strong>卧 具</td> <td width="99" height="1"><strong><font color="#008080" face="楷体_GB2312"><input name="fujia_TV" type="checkbox" value="TV" <?php if($myrow[fujia_TV]) echo("checked");?>> </font></strong>电视机
The combined use of these form fields is suitable Modify some database records and keep the original records as they were when added!
3. Select default selected item
Code example:
<form name="FORM" method="post" action="" enctype="multipart/form-data"> <select name='aaa' id='bbb'> <option value=''>省份分类---</option><option value='内蒙古'>内蒙古</option> <option value='新疆'>新疆</option><option value='云南'>云南</option> <option value='西藏'>西藏</option><option value='甘肃'>甘肃</option> <option value='宁夏'>宁夏</option><option value='青海'>青海</option> <option value='四川'>四川</option><option value='广西'>广西</option> <option value='贵州'>贵州</option><option value='海南'>海南</option> <option value='广东'>广东</option><option value='湖南'>湖南</option> <option value='湖北'>湖北</option><option value='福建'>福建</option> <option value='江西'>江西</option><option value='浙江'>浙江</option> <option value='安徽'>安徽</option><option value='江苏'>江苏</option> <option value='河南'>河南</option><option value='陕西'>陕西</option> <option value='山东'>山东</option><option value='河北'>河北</option> <option value='山西'>山西</option><option value='黑龙江'>黑龙江</option> <option value='吉林'>吉林</option><option value='辽宁'>辽宁</option> </select> </form> <script type="text/java script"> <!-- document.FORM.bbb.value = "山东";//FORM是表单名,atc_province是select标签ID, 山东是select默认选中项 //--> </script>
4. How to implement the default selection of php select
Code example:
<select name="wuyeleixing" size="1"> <option <?php if($myrow[wuyeleixing]==1) echo("selected");?> value="1">住宅</option> <option <?php if($myrow[wuyeleixing]==2) echo("selected");?> value="2">办公室</option> <option <?php if($myrow[wuyeleixing]==3) echo("selected");?> value="3">营业房</option> <option <?php if($myrow[wuyeleixing]==4) echo("selected");?> value="4">厂房</option> <option <?php if($myrow[wuyeleixing]==5) echo("selected");?> value="5">仓库</option> <option <?php if($myrow[wuyeleixing]==6) echo("selected");?> value="6">地块</option> <option <?php if($myrow[wuyeleixing]==7) echo("selected");?> value="7">综合楼</option> <option <?php if($myrow[wuyeleixing]==8) echo("selected");?> value="8">农牧场</option> <option <?php if($myrow[wuyeleixing]==9) echo("selected");?> value="9">商住楼</option> <option <?php if($myrow[wuyeleixing]==10) echo("selected");?> value="10">宾馆酒楼</option> <option <?php if($myrow[wuyeleixing]==11) echo("selected");?> value="11">校舍</option> </select>
2. How to set default selections for select tags, radio buttons, and check boxes
When modifying background information, the original information needs to be displayed, but if it is displayed in
If you do the following:
<input type="radio" name="status" value="0" checked="${advert.status==0?'checked':'' }"/> />
Because there will be checked in each radio, there will be a problem with the display!
At this time, you can use
So, choose another method:
<input type="radio" name="status" value="0" <c:out value="${advert.status==0?'checked':'' }"/> />
This is both convenient and eliminates tedious judgments.
Summary:
1. As long as checked or selected appears in
3. js implements the default selection of radio and select
1. Radio default The selected js code, where is the background data.
Code example:
<script> //radio默认选中 function init(){ var v = '<%=order.getType()%>'; var type = document.getElementsByName("orderType"); for(var i = 0; i < type.length; i = i + 1){ if(type[i].value == v){ type[i].checked = "checked"; return ; } } } </script>
2. Select the js code selected by default, where is the background data.
Code example:
<script> //select默认选中 //by www. function init(){ var v = '<%=c.getLevel()%>'; var type = document.getElementById("level"); for(i = 0;i<=type.options.length;i++){ if(type.options[i].value == v){ type.options[i].selected = 'selected'; } } } </script>
3. Call example
<body onload="init();">
The above is the detailed content of PHP's default selection methods for some radio selections and check boxes (example). For more information, please follow other related articles on the PHP Chinese website!

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实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。


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