Question

请帮助我，我正在制作在线学生信息，它有很多学生，我不知道如何根据他们的 StudID （学生证）来分离学生的成绩）。

我的代码是这样的......

function Content() 
{
      $code = <<< htmlcode
        <center>
            <form name="frmGrade" method="POST" action="" style="padding-top:30px;">
                <table border="1" align="center">
                  <tr>
                    <td align="center">Subject</td>
                    <td align="center">First Grading</td>
                    <td align="center">Second Grading</td>
                    <td align="center">Third Grading</td>
                    <td align="center">Fourth Grading</td>
                    <td align="center">Average</td>
                    <td align="center">Remarks</td>
                  </tr>
        </center>
        htmlcode;

    //-------------------------------------
    // retrieve data from database
    //-------------------------------------
    $sql = "SELECT Subject,FirstGrading,SecondGrading,ThirdGrading,FourthGrading,Average,Remarks FROM grades WHERE StudID = '002' ;";
    $result = mysql_query($sql);
    $num_rows = mysql_num_rows($result);

    //-------------------------------------
    // fetch each record from database
    //-------------------------------------
    if($num_rows > 0)
    {

        for($ctr = 1; $ctr <= $num_rows; $ctr++)
        {
            $row = mysql_fetch_array($result);
            $sub = $row['Subject'];
            $fg = $row['FirstGrading'];
            $secg = $row['SecondGrading'];
            $thg = $row['ThirdGrading'];
            $fourthg = $row['FourthGrading'];
            $ave = $row['Average'];
            $remarks = $row['Remarks'];

            $code .= <<< htmlcode
                <tr $bg>
                    <td style="padding:5;"> $sub </td>
                    <td style="padding:5;"> $fg </td>
                    <td style="padding:5;"> $secg </td>
                    <td style="padding:5;"> $thg  </td>
                    <td style="padding:5;"> $fourthg </td>
                    <td style="padding:5;"> $ave </td>
                    <td style="padding:5;"> $remarks </td>
                    $actions
                </tr>
            htmlcode;
        }

        //-------------------------------------
        // end table 
        //-------------------------------------
        $code .= "</table> </form></center> </br></br>";

    }

    //-------------------------------------
    // Display table
    //-------------------------------------

    return $code;
}
?>

我想要的是，当学生一个StudID = 001时，他/她将会看到他/她的成绩，当学生二的StudID = 002时，他们只会看到他的成绩。

Answer 1

从$result而不是while loop

中的for loop获取行

function Content($sid) 
{
  $code = <<< htmlcode
    <center>
        <form name="frmGrade" method="POST" action="" style="padding-top:30px;">
            <table border="1" align="center">
              <tr>
                <td align="center">Subject</td>
                <td align="center">First Grading</td>
                <td align="center">Second Grading</td>
                <td align="center">Third Grading</td>
                <td align="center">Fourth Grading</td>
                <td align="center">Average</td>
                <td align="center">Remarks</td>
              </tr>
    </center>
    htmlcode;

//-------------------------------------
// retrieve data from database
//-------------------------------------
$sql = "SELECT Subject,FirstGrading,SecondGrading,ThirdGrading,FourthGrading,Average,Remarks FROM grades WHERE StudID = '$sid' ;";
$result = mysql_query($sql);
$num_rows = mysql_num_rows($result);

//-------------------------------------
// fetch each record from database
//-------------------------------------
if($num_rows > 0)
{

    while($row = mysql_fetch_array($result))
    {

        $sub = $row['Subject'];
        $fg = $row['FirstGrading'];
        $secg = $row['SecondGrading'];
        $thg = $row['ThirdGrading'];
        $fourthg = $row['FourthGrading'];
        $ave = $row['Average'];
        $remarks = $row['Remarks'];

        $code .= <<< htmlcode
            <tr $bg>
                <td style="padding:5;"> $sub </td>
                <td style="padding:5;"> $fg </td>
                <td style="padding:5;"> $secg </td>
                <td style="padding:5;"> $thg  </td>
                <td style="padding:5;"> $fourthg </td>
                <td style="padding:5;"> $ave </td>
                <td style="padding:5;"> $remarks </td>
                $actions
            </tr>
        htmlcode;
    }

    //-------------------------------------
    // end table 
    //-------------------------------------
    $code .= "</table> </form></center> </br></br>";

}

//-------------------------------------
// Display table
//-------------------------------------

return $code;
}
?>

<?php
    //to get content for student 001
    echo Content('001');

    //to get content for student 002
    echo Content('002');
?>

如何分开学生的成绩

1 个答案: