是否可以使用此代码将它们总计添加为总计？

Question

是否可以使用此代码计算总计。按下按钮后，我想让compcase和caselight提供总计。任何帮助将不胜感激，因为我不能找出一种可能的方式来计算这一切。

的index.php

function casePrice(str) { 
if (str=="") { 
document.getElementById("txtHint").innerHTML=""; 
return; 
} 
if (window.XMLHttpRequest) { 
// code for IE7+, Firefox, Chrome, Opera, Safari 
xmlhttp=new XMLHttpRequest(); 
} else { // code for IE6, IE5 
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); 
} 
xmlhttp.onreadystatechange=function() { 
if (xmlhttp.readyState==4 && xmlhttp.status==200) { 
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText; 
} 
} 
xmlhttp.open("GET","caseprice.php?q="+str,true); 
xmlhttp.send(); 
} 

    function caselightPrice(str) { 
if (str=="") { 
document.getElementById("txtHint").innerHTML=""; 
return; 
} 
if (window.XMLHttpRequest) { 
// code for IE7+, Firefox, Chrome, Opera, Safari 
xmlhttp=new XMLHttpRequest(); 
} else { // code for IE6, IE5 
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); 
} 
xmlhttp.onreadystatechange=function() { 
if (xmlhttp.readyState==4 && xmlhttp.status==200) { 
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText; 
} 
} 
xmlhttp.open("GET","caselightprice.php?q="+str,true); 
xmlhttp.send(); 
} 

</script> 

<Form name ="pc" Method ="Post" ACTION ="radiobutton.php"> 
<Input type = 'Radio' Name ='compcase' onchange="casePrice(this.value)" value= '1' />NZXT Phantom Enthusiast USB3.0 Full Tower Case - White <br /> 
<Input type = 'Radio' Name ='compcase' onchange="showPrice(this.value)" value= '2' />Corsair Obsidian 750D Large Tower Case Black <br /> 
<Input type = 'Radio' Name ='compcase' onchange="showPrice(this.value)" value= '3' />Cooler Master CM Storm Trooper Black Full Tower Gaming Case <br /><br /> 

<Input type = 'Radio' Name ='caselight' onchange="caselightPrice(this.value)" value= '1' />Red<br /> 
<Input type = 'Radio' Name ='caselight' onchange="caselightPrice(this.value)" value= '2' />Green <br /><br /> 

<div id="txtHint"><b>Show price here</b></div> 

caseprice.php

<?php 
$q = intval($_GET['q']); 

$con = mysqli_connect('localhost','root','','test'); 
if (!$con) { 
die('Could not connect: ' . mysqli_error($con)); 
} 

mysqli_select_db($con,"compcase"); 
$sql="SELECT * FROM compcase WHERE id = '".$q."'"; 
$result = mysqli_query($con,$sql); 

while($row = mysqli_fetch_array($result)) { 
echo "<tr>"; 
echo "<td>" . $row['case_price'] . "</td>"; 
echo "</tr>"; 
} 
echo "</table>"; 

mysqli_close($con); 
?> 

Answer 1

你想总计的情况？ 如果是这样，让你的选择查询这样：

SELECT SUM('case_price') AS grand_total FROM compcase WHERE id = '".$q."'"; 

然后，当你通过foreach循环使用$行[“grand_total”]。