Question

我正在创建一个网站，人们可以使用编号为1-10的无线电盒对内容进行评级。选中时，单选框会将评级发送到数据库，并且工作正常。然后我想要进行平均计算以找到平均评级并输出结果。我已经尝试了很多方法但无济于事，包括使用数组。术语“总计”＆＃39;是提交评分的人员总数和“评分”一词。是有史以来提交的所有无线电盒值的总和。我将非常感谢任何帮助。

<?php

$con2=mysqli_connect("myhost","user","password","place");

// Check connection
if (mysqli_connect_errno($con2))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();


}
$value=$_POST['rating'];
$id=$_POST['id'];


mysqli_query  ($con2, "UPDATE table SET totalraters = totalraters + 1 WHERE id='$id'  ");
mysqli_query  ($con2, "UPDATE table SET ratingsum = ratingsum + '$value' WHERE id='$id' ");


//Works great up to here 



 $ratingsum = mysqli_query($con2, "SELECT ratingsum FROM table WHERE id='$id' ");
 $totalraters = mysqli_query($con2, "SELECT totalraters FROM table WHERE id='$id' ");




  IF ($totalraters != 0)  {
 $rating = (int)($ratingsum/$totalraters);

  }

mysqli_query ($con2, "UPDATE table SET rating ='$rating' WHERE id='$id'  ") or   trigger_error(mysqli_error($con2)); 



 mysqli_close($con2);

 header('Location: back to same page ');

 ?>

此刻，在评分完成后，我将返回到原始页面，但当前评级始终为1，而不是正确的结果，尽管它输出正确数量的评分者。

Answer 1

Yippee我终于修好了，你的帮助也很好hichris123 ....非常感谢!!这花了我几个小时，所以我发布它可能会帮助别人。

<?php

$con2=mysqli_connect("webhost.com","account","password","user");

 // Check connection
if (mysqli_connect_errno($con2))
  {
 echo "Failed to connect to MySQL: " . mysqli_connect_error();


  }
  $value=$_POST['rating'];
 $id=$_POST['id'];


  mysqli_query  ($con2, "UPDATE table SET totalraters = totalraters + 1 WHERE      id='$id' ");
  mysqli_query  ($con2, "UPDATE table SET ratingsum = ratingsum + '$value' WHERE id='$id' ");


$query1 = mysqli_query($con2, "SELECT ratingsum FROM table WHERE id='$id' ");
$query2 = mysqli_query($con2, "SELECT totalraters FROM table WHERE id='$id' ");

$row = mysqli_fetch_array($query1);
$ratingsum = intval($row['ratingsum']);
$row2 = mysqli_fetch_array($query2);
$totalraters = intval($row2['totalraters']);


$rating = (intval($ratingsum/$totalraters));


mysqli_query ($con2, "UPDATE table SET rating = '$rating' WHERE id='$id' ");


 include ('index/starting page.html');

使用无线电盒和PHP分配评级

1 个答案: