使用PHP从数据库检索到的数据未以HTML格式显示

Question

我遇到一个问题，我要让用户在文本区域中输入信息，并将该信息存储在mysql数据库中。 允许用户将HTML插入文本区域，例如：

<ul>
  <li>Test</li>
</ul>

但是，我很难理解为什么从数据库检索来显示用户输入数据的数据没有显示用户请求的正确HTML格式。

这就是我所拥有的：显示信息：

<?php
function display ($result) {
  if (mysql_num_rows($result) > 0) {
    echo "<form action='scripts/submit.php' method='post'>";
      echo "<input type='submit' name='post' value='Post'/>";
      echo " | ";
      echo "<label for='searchDate'>Search Archives By Date:</label>";
      echo "<input type='text' name='searchDate'>";
      echo "<input type='submit' name='submitDate' value='Search'/>";
      echo " | ";
      echo "<label for='searchTicket'>Search Archives By Ticket:</label>";
      echo "<input type='text' name='searchTicket'/>";
      echo "<input type='submit' name='submitTicket' value='Search'/>";
      echo "<hr/>";
    echo "</form>";
    echo "<table border='1' id='resultTable'>";
      while($row = mysql_fetch_assoc($result)) {
      $replace = str_replace ("\n","<br/>",$row['content']);
      echo "<tr>";
        echo "<td><span id='boldText'>Entry By:</span> ".$row['user']." | <span id='boldText'>Description:</span> ".$row['description']." | <span id='boldText'>Entry Date:</span> ".$row['date']."</td>";
      echo "</tr>";
      echo "<tr>";
        echo "<td>";
            echo "<p>".$replace."</p>";
        echo "</td>";
      echo "</tr>";
      echo "<tr>";
        echo "<td>";
          echo "<form action='scripts/submit.php' method='post'>";
            echo "<input type='hidden' name='count' value='$row[count]'/>";
            echo "<input type='submit' name='edit' value='Edit'/>";
            echo "<input type='submit' name='delete' value='Delete'/>";
          echo "</form>";
        echo "</td>";
      echo "</tr>";
          }
          echo "</table>";
      }
      else {
        echo "<h3 id='noResults'>Nothing has been posted yet.  Click 'Post' to add something to the whiteboard.</h3>";
        echo "<form action='scripts/submit.php' method='post'>";
          echo "<input type='submit' name='post' value='Post'/>";
        echo "</form>";
      }
}

?>

添加发布逻辑：

if(isset($_POST['add_post'])) {
$content = mysql_real_escape_string($_POST['content']);
$description = mysql_real_escape_string($_POST['desc']);

  $query = "INSERT INTO $table_name (user, description, content)
            VALUES ('$_SESSION[logged_in]','$description', '$content')";
  $result = mysql_query($query);
  session_write_close();
  header('Location: ../whiteboard.php');
}

由于某些原因，上面的示例将无法正常工作，但这将：

<p style="font-weight: 900;">Test</p>

Answer 1

尝试解析，然后使用htmlentities（）或nl2br（）插入数据库，并在取回时进行相反的操作。

Answer 2

如果在浏览器中查看数据库条目，则将看到格式化HTML的结果，而不是实际的标记-如果要这样做，请使用htmlentities（$ result）。

查看页面源以查看正在检索的内容，并查看与您期望的内容有何不同。