怎么实现两个input值相加后显示在另外一个input中及数据库中数填充在input中？-PHP Tutorial-php.cn

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怎么实现两个input值相加后显示在另外一个input中及数据库中数填充在input中？

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Jun 23, 2016 pm 01:55 PM

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表单中有4个INPUT（A,B,C,D），其中2个input值输入(A,B)，1个input值(C)由一个输入的input值(B)大小而从数据库中读出，另外1个input(D)存储结果,怎么实现两个input值相加(A+C)后显示在另外一个input中(D)？PS:从数据库中读取的数怎么填充在input中（C）,谢谢

回复讨论(解决方案)

去学习下Ajax的用法。

明天要使用，请问怎么实现读取数据库中值填充至input中呢？

从数据库中读取的数怎么填充在input 可以用PHP。
两个input值相加可以用JS完成。
具体如何，你得贴出相关代码。

异步加载input填充读取数据库

用js或用ajax都可以实现

从数据库中读取的数怎么填充在input 可以用PHP。
两个input值相加可以用JS完成。
具体如何，你得贴出相关代码。

想实现输入日期后，依据日期从数据库中读取相应汇率并填充至汇率input中，请问如何实现，代码如下：

<html><head><!--日历控件--><script src="Calendar1.js"></script><script>function result_note(){    alert("无符合条件记录");}</script></head><body><img  src="/static/imghwm/default1.png"  data-src="image/2.jpg"  class="lazy"  / alt="怎么实现两个input值相加后显示在另外一个input中及数据库中数填充在input中？" ><input type="button" name="start_time" value="系统使用" onclick="location='exchange_index.php';"></input><input type="button" name="start_time" value="系统维护" onclick="location='exchange_add.php';"></input> <form id="input_form" method="get" action="exchange_index.php" onsubmit="return checkdata()"> <table width="600" border="0" cellpadding="0" cellspacing="0"  align="center">	<br>	<br>	&nbsp&nbsp币种&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp金额&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp日期	&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp汇率&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp结果(人民币)	<br>		<select name="currency_name">			<option value="<?php			echo $_REQUEST [currency_name];			?>"				selected="selected">			<?php			if ($_REQUEST [currency_name] == "")				echo "请选择";			elseif ($_REQUEST [currency_name] == "美元")				echo "美元";			elseif ($_REQUEST [currency_name] == "日元")				echo "日元";			elseif ($_REQUEST [currency_name] == "人民币")				echo "人民币";						?></option>			//应用时需要修改			<option value="美元">美元</option>			<option value="日元">日元</option>			<option value="人民币">人民币</option>			<option value="">请选择</option>		</select>			<input type="text" autocomplete="off"  name="money_1" size="12" value="<?php			echo $_REQUEST [money_1];			?>"/>				*&nbsp<input autocomplete="off" onfocus="calendar()" name="exchange_date_1"			type="text" size="10"			value="<?php			echo $_REQUEST [exchange_date_1];			?>" />	<input type="text" autocomplete="off"  name="currency_value_1" size="10" value="<?php $row[currency_name]?>">				=&nbsp<input type="text" autocomplete="off"  name="result_1" size="10" value="<?php $row[currency_name]?>">						<br>		<!--<?php echo '$_REQUEST [money_1]='.$_REQUEST [money_1];?>-->    </table>  <p align="center"><input type="submit" onclick="javascript:return confirm_submit()" value="计算">   <input type="button" onclick="location='exchange_index.php';" value="重置"></form>	<?php include("connect.php");//设置查询条件$strwhere="";$currency_name=$_REQUEST["currency_name"];$exchange_date_1=$_REQUEST["exchange_date_1"];$strwhere=$strwhere.' and exchange.currency_name = '.'"'. $currency_name .'"'.' and exchange.exchange_date = '.'"'. $exchange_date_1 .'"';$sql="SELECT * FROM exchange where 1=1 ".$strwhere;//echo '$sql='.$sql;//echo '$sql='.$sql;$result=mysql_query($sql) or die(mysql_error());//判断是否有符合条件记录if(!$num = @mysql_num_rows($result)){echo "<script type='text/javascript'>result_note();</script>";die("");}$row=@mysql_fetch_array($result)?>			</body></html>

用js或用ajax都可以实现

请问具体如何实现

js 能获取动态数据的基本上行就是ajax

利用ajax已实现，谢谢各位

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