1

我有以下代码,它根据用户的登录详细信息从表中获取用户数据

//==========================================
//  CONNECT TO THE LOCAL DATABASE
//==========================================
$user_name = "xxxx";
$pass_word = "xxxxx";
$database = "xxxx";
$server = "xxxxxx";

$db_handle = mysql_connect($server, $user_name, $pass_word);
$db_found = mysql_select_db($database, $db_handle);

if ($db_found) {
    $SQL = "SELECT * FROM students WHERE L1 = '$uname' AND L2 = '" .md5 ($_POST['password'])."'";
    $result = mysql_query($SQL);
    $num_rows = mysql_num_rows($result);

    //====================================================
    //  CHECK TO SEE IF THE $result VARIABLE IS TRUE
    //====================================================

    if ($result) {
        if ($num_rows > 0) {
            $color="1";

            $result = mysql_query("SELECT * FROM entry, students   WHERE entry.studentName = students.studentName AND students.L1='$uname' ") or die(mysql_error());  

            echo "<p>Welcome "; echo $row[studentName];
            echo "<p>You records as of ";
            echo date('l jS \of F Y h:i:s A');  

            echo "<table border='1' cellpadding='2' cellspacing='0'>";
            echo "<tr> <th>Date</th><th>Student Name</th> <th>Tutor name</th> <th>Procedure name</th> <th>Grade</th><th>Student Reflection</th><th>Tutor Comments</th><th>Professionalism</th> <th>Communication</th> <th>Alert</th> <th>Dispute</th> </tr>";
            // keeps getting the next row until there are no more to get

            while($row = mysql_fetch_array( $result )) {
                if($color==1){
                    echo "<tr bgcolor=#DDD ><td>".$row['date']."</td><td>".$row['studentName']."</td><td>".$row['tutorName']."</td><td>".$row['procedureName']."</td><td>".$row['grade']."</td><td>".$row['studentReflection']."</td><td>".$row['tutorComments']."</td><td>".$row['professionalism']."</td><td>".$row['communication']."</td><td>".$row['alert']."</td><td>".$row['dispute']."</td></tr>";

                    // Set $color==2, for switching to other color
                    $color="2";
                }
                // When $color not equal 1, use this table row color
                else {
                    echo "<tr bgcolor='#CCC'><td>".$row['date']."</td><td>".$row['studentName']."</td><td>".$row['tutorName']."</td><td>".$row['procedureName']."</td><td>".$row['grade']."</td><td>".$row['studentReflection']."</td><td>".$row['tutorComments']."</td><td>".$row['professionalism']."</td><td>".$row['communication']."</td><td>".$row['alert']."</td><td>".$row['dispute']."</td></tr>";
                    // Set $color back to 1
                    $color="1";
                }
            }
            echo '</table>';
        }

我想要做的是回显或打印出表格上方的用户名,但我很难这样做。我唯一想让它工作的就是将它添加到 while 循环中,但它会根据用户的记录多次打印出来。

你能帮我吗?

4

2 回答 2

1

您需要获取第一行才能访问用户信息。这意味着您必须mysql_fetch_array在循环之前调用一次。

这会给你带来麻烦,因为你还需要在循环中调用它。你可以通过使用各种布尔标志或行的副本来解决这个问题,但最好的方法是稍微改变你的代码结构。

使用 a do-while loop,与 a 结合使用if statement。这允许您首先获取单行,如果没有找到则采取特殊操作。之后,你得到了一个循环,它现在做的事情,只是它检查迭代之后是否有下一行而不是之前,否则第一行将在表输出中被跳过。

if ($row = mysql_fetch_array( $result )) {
  // Print user info
  // Print table header

  do {

    // Print table row

  } while ($row = mysql_fetch_array( $result ));

  // Print table footer
}
else
{
  // User not found. Print error or whatever.
}
于 2012-10-23T14:04:20.533 回答
0

您的逻辑有误...您正在制作学生表,并且您想回应 Welcome to the student which is logged_in

但是你用echo "<p>Welcome "; echo $row[studentName];

未设置 $row 的地方...此名称应来自先前的选择 ..

于 2012-10-23T14:04:34.090 回答