php - mysql代码没问题。 Php 无法回显它。为什么？

Question

我是 PHP 新手。这段 mysql 代码 100% 在 phpmyadmin 中运行。我正在使用 <?php echo $row['Rank'];?>但我只为所有学生得到 1。也许我不擅长附和。请帮助我。

Select Distinct regd, Roll_no, Name_of_Student, Test_date,
English, f_eng, Mizo, f_mz,  Hindi, f_hn,  Mathematics,  f_maths, SS, f_ss, Science, 
f_sc, score, fmscore, perc, Rank FROM (SELECT *, IF(@marks = (@marks := score), @auto, 
@auto := @auto + 1) AS Rank FROM
(SELECT regd, Roll_no, Name_of_Student, Test_date,
SUM( IF( `Subject` = 'English', Mark_score, 0 ) ) AS English,
SUM( IF( `Subject` = 'English', Full_mark, 0 ) ) AS f_eng, 
SUM( IF( `Subject` = 'Mizo', Mark_score, 0 ) ) AS Mizo,
SUM( IF( `Subject` = 'Mizo', Full_mark, 0 ) ) AS f_mz, 
SUM( IF( `Subject` = 'Hindi', Mark_score, 0 ) ) AS Hindi,
SUM( IF( `Subject` = 'Hindi', Full_mark, 0 ) ) AS f_hn, 
SUM( IF( `Subject` = 'Mathematics', Mark_score, 0 ) ) AS Mathematics, 
SUM( IF( `Subject` = 'Mathematics', Full_mark, 0 ) ) AS f_maths, 
SUM( IF( `Subject` = 'SS', Mark_score, 0 ) ) AS SS,
SUM( IF( `Subject` = 'SS', Full_mark, 0 ) ) AS f_ss, 
SUM( IF( `Subject` = 'Science', Mark_score, 0 ) ) AS Science,
SUM( IF( `Subject` = 'Science', Full_mark, 0 ) ) AS f_sc,
SUM(Full_mark) AS fmscore,
SUM(Mark_score) AS score, SUM(Mark_score)/SUM(Full_mark)*100 as perc FROM cxexam,
(SELECT @auto := 0, @marks := 0) AS init GROUP BY regd ORDER BY score DESC) t) AS result where Test_date between '2013-07-01' and '2013-07-31'

这是 PHP 部分。好像没问题它还正确地回应了一切，除了它没有正确输出排名。在排名行中它只显示 1作为所有学生的排名。您可以从下面的代码中了解我想要实现的目标。我真的需要你的帮助。我知道你们很熟悉这样的问题。

<table width="800" border="1" class="tablestyle" cellpadding="8" cellspacing="6">
<tr> 
    <th align="center" width="80">Roll No</th>
    <th align="center" width="100">Name_of_Student</th>
    <th align="center" width="40">English</th>
    <th align="center" width="55">Mizo</th>
    <th align="center" width="55">Hindi</th>
    <th align="center" width="55">Math</th>
    <th align="center" width="70">SS</th>
    <th align="center" width="40">Science</th>
     <th align="center" width="70">FM</th>
      <th align="center" width="70">MO</th>
      <th align="center" width="40">Percentage</th>
      <th align="center" width="40">Rank</th>
      <th align="center" width="40">Result</th>

</tr>
<?php 
    while($row=mysql_fetch_array($res))
    {
?>
<tr>
    <td align="center"><?php echo $row['Roll_no'];?></td>
    <td align="left"><?php echo $row['Name_of_Student'];?></td>
    <td align="center"><?php echo $row['English'];?></td>
    <td align="center"><?php echo $row['Mizo'];?></td>
    <td align="center"><?php echo $row['Hindi'];?></td>
    <td align="center"><?php echo $row['Mathematics'];?></td>
    <td align="center"><?php echo $row['SS'];?></td>
    <td align="center"><?php echo $row['Science'];?></td>
    <td align="center"><?php echo $row['fmscore'];?></td>
    <td align="center"><?php echo $row['score'];?></td>
    <td align="center"><?php echo number_format($row['perc'],0);?>%</td>
    <td><?php echo $row['Rank']; ?></td>
    <td><?php 
    if ($row['English']/$row['f_eng']*100>=40 && $row['Mizo']/$row['f_mz']*100>=40 && $row['Hindi']/$row['f_hn']*100>=40 && $row['Mathematics']/$row['f_math']*100>=40 && $row['SS']/$row['f_ss']*100>=40 && $row['Science']/$row['f_sc']*100>=40)
   {
   echo "<font color=green>Passed</font>";
   }
   else 
   {
   echo "<font color=red>Failed</font>";
   }
   ?></td>

</tr>
<?php
    }
?>
</table>

Answer 1

可以只给出概述来完成这个东西。

$sql_q="<!--put your Query Here.-->";
$res=mysql_query($sql_q);

<!--Now Make a Table to Present all the Things-->

<table>
    <tr> 
        <th>English</th>
        <th>Mizo</th>
        <th>Hindi</th>
        <th>Math</th>
        <th>SS</th>
        <th>Science</th>
    </tr>
    <?php 
        while($row=mysql_fetch_array($res))
        {
    ?>
    <tr>
        <td><!--Your Data for Each Columns--></td>
            <!-- Example to print Roll No-->
            <td><?php echo $row['Roll_no'];?></td>


    </tr>
    <?php
        }
    ?>

</table>