通过PHP脚本传递HTML隐藏变量

Question

我有一个HTML表单，它是从我的php脚本中回应的。当我尝试通过脚本传递隐藏变量时，代码无法按预期工作。

$threadNumber=$row["Tid"];
echo "<center><b>Message# ", $messageNumber , ": </b><br>";
echo $row["Mtitle"] , " in Thread# " , $row["Tid"] , "<br>";
echo "The Message was Written on " , $row["Mdate"] , '<br>';
echo $row["Mbody"];
echo "<br><br>";
echo '<form action="messageReply.php" method="post">';
echo '<textarea name="reply" rows=5 cols=30 placeholder="Reply to the Message?"></textarea>';
echo '<input type="hidden" name="Mtitle" value="<?php echo $row["Mtitle"] ?>">';
echo '<input type="submit" value="Send Message">';
echo '</form>';

结果如下：

当我尝试在messageReply.php脚本中读取$ _POST [“Mtitle”]时，我收到一条错误，指出这样的索引不存在。

Answer 1

试试这个：

echo '<input type="hidden" name="Mtitle" value='.$row['Mtitle'].'>';

您的完整代码（已修改）：

$threadNumber=$row["Tid"];
echo "<center><b>Message# ", $messageNumber , ": </b><br>";
echo $row["Mtitle"] , " in Thread# " , $row["Tid"] , "<br>";
echo "The Message was Written on " , $row["Mdate"] , '<br>';
echo $row["Mbody"];
echo "<br><br>";
echo '<form action="messageReply.php" method="post">';
echo '<textarea name="reply" rows=5 cols=30 placeholder="Reply to the Message?"></textarea>';
echo '<input type="hidden" name="Mtitle" value='.$row['Mtitle'].'>';
echo '<input type="submit" value="Send Message">';
echo '</form>';

Answer 2

注意：你在php中使用php。请在代码下面更改：

<?php
echo '<input type="hidden" name="Mtitle" value="'.$row["Mtitle"].'">';
?>