Question

保持获取错误，如屏幕截图所示。我已经尝试过在迷宫中留下的故障排除。

<?php 
include 'database.php';
session_start();
$pdo = Database::connect();
$test = $_SESSION['username'];
$sql = "SELECT companyname,companyaddress,country,companystate,email,mobile,companytype FROM company WHERE username= '" . mysql_real_escape_string($test) . "'";
foreach ($pdo->query($sql) as $row) {
echo '<tr>';
echo '<td>'. $row['companyaddress'] . '</td>';
echo '<td>'. $row['country'] . '</td>';
echo '<td>'. $row['companystate'] . '</td>';
echo '<td>'. $row['email'] . '</td>';
echo '<td>'. $row['mobile'] . '</td>';
echo '<td>'. $row['companytype'] . '</td>';
echo '<td width=250>';
echo '<a class="btn" href="read.php?username='.$row['username'].'">View Details</a>';
echo '&nbsp;';
echo '<a class="btn btn-success" href="update.php?username='.$row['username'].'">Update</a>';
echo '&nbsp;';
echo '<a class="btn btn-danger" href="delete.php?username='.$row['username'].'">Delete</a>';
echo '</td>';
echo '</tr>';
}
Database::disconnect();
?>

This is the error I keep getting.

Answer 1

使用前 $ _ SESSION [＆＃39;用户名＆＃39;] 请设置其值

<?php 
session_start();
$_SESSION['username']=1;//Set value of session before use
include 'database.php';
$pdo = Database::connect();
$test = $_SESSION['username'];
$sql = "SELECT companyname,companyaddress,country,companystate,email,mobile,companytype FROM company WHERE username= '" . mysql_real_escape_string($test) . "'";
        foreach ($pdo->query($sql) as $row) {
        echo '<tr>';
        echo '<td>'. $row['companyname'] . '</td>';
        echo '<td>'. $row['companyaddress'] . '</td>';
        echo '<td>'. $row['country'] . '</td>';
        echo '<td>'. $row['companystate'] . '</td>';
        echo '<td>'. $row['email'] . '</td>';
        echo '<td>'. $row['mobile'] . '</td>';
        echo '<td>'. $row['companytype'] . '</td>';
        echo '<td width=250>';
        echo '<a class="btn" href="read.php?username='.$row['username'].'">View Details</a>';
        echo '&nbsp;';
        echo '<a class="btn btn-success" href="update.php?username='.$row['username'].'">Update</a>';
        echo '&nbsp;';
        echo '<a class="btn btn-danger" href="delete.php?username='.$row['username'].'">Delete</a>';
        echo '</td>';
        echo '</tr>';
        }
        Database::disconnect();
        ?>

PHP未定义索引错误扭曲页面

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