Php 零误差除法

我正在尝试实现一个投票系统，当用户单击其中一个超链接时，页面将刷新，数据库应使用数据库信息进行更新，我得到了一个除法为零的错误，由于包含的条件语句，这种错误不再存在，但是，当用户单击其中一个超链接时，投票无效，数据库也不会更新

<?php 
 // Connects to your Database 
 mysql_connect("localhost", "root", "password") or die(mysql_error()); 
 mysql_select_db("dbname") or die(mysql_error()); 

  //We only run this code if the user has just clicked a voting link
 if ( $mode=="vote") 
 { 

 //If the user has already voted on the particular thing, we do not allow them to vote again    

 $cookie = "Mysite$id"; 
 if(isset($_COOKIE[$cookie])) 
    { 
    Echo "Sorry You have already ranked that site <p>"; 
    } 

  //Otherwise, we set a cooking telling us they have now voted 
else 
    { 
    $month = 2592000 + time(); 
    setcookie(Mysite.$id, Voted, $month); 

     //Then we update the voting information by adding 1 to the total votes and adding their vote (1,2,3,etc) to the total rating 
 mysql_query ("UPDATE reports SET total = total + $voted, votes = votes + 1 WHERE reportID = $id"); 
    Echo "Your vote has been cast <p>"; 
    } 
 } 

 //Puts SQL Data into an array
 $data = mysql_query("SELECT * FROM reports WHERE reportID = $id") or die(mysql_error()); 

 //Now we loop through all the data 
 while($ratings = mysql_fetch_array( $data )) 
 { 

 //This outputs the sites name 
 Echo "Name: " .$ratings['reportName']."<br>"; 

  //This calculates the sites ranking and then outputs it - rounded to 1 decimal 


if(isset($ratings['votes']) && $ratings['votes'] != 0){
  $current = $ratings['total'] / $ratings['votes']; 
  Echo "Current Rating: " . round($current, 1) . "<br>"; 
}



 //This creates 5 links to vote a 1, 2, 3, 4, or 5 rating for each particular item 
 Echo "Rank Me: "; 
 Echo "<a href=".$_SERVER['PHP_SELF']."?mode=vote&voted=1&id=".$ratings['reportID'].">Vote 1</a> | "; 
 Echo "<a href=".$_SERVER['PHP_SELF']."?mode=vote&voted=2&id=".$ratings['reportID'].">Vote 2</a> | "; 
 Echo "<a href=".$_SERVER['PHP_SELF']."?mode=vote&voted=3&id=".$ratings['reportID'].">Vote 3</a> | "; 
 Echo "<a href=".$_SERVER['PHP_SELF']."?mode=vote&voted=4&id=".$ratings['reportID'].">Vote 4</a> | "; 
 Echo "<a href=".$_SERVER['PHP_SELF']."?mode=vote&voted=5&id=".$ratings['reportID'].">Vote 5</a><p>"; 
 } 
 ?>

任何帮助都将不胜感激

---

谢谢

在进行除法运算之前，请先检查

$ratings[投票]

的值

if(isset($ratings[votes]) && $ratings[votes] != 0){
    $current = $ratings[total] / $ratings[votes]; 
    Echo "Current Rating: " . round($current, 1) . "<br>"; 
}

if（isset（$ratings[voces]）&&$ratings[voces]！=0）{
$current=$ratings[总票数]/$ratings[票数]；
回声“电流额定值：。圆形（$Current，1）。”
”；
}

$ratings[投票]

为0。找出原因。顺便说一句，你遗漏了

'total'

和

'voates'

的引号（PHP允许这是一个历史性的意外，而不是shoutier警告是我最讨厌的事情之一）。如果你不明白这是一个错误，试着在计算器上、纸上或任何地方计算

42/0

。这是一个没有正确答案的等式。最好检查

$rating['total']

是否有一个正确的值，这取决于这些值的来源。@IMSoP是的，我同意你的意见。在我的数据库中，该字段默认设置为零，这可能是导致错误的原因吗？@user3296793是的。但是没关系。您可以从

PHP

end检查这一点。