它无法显示下拉菜单中的选定值

Question

我有一个应用程序，你可以在这里查看测试APPLICATION,，但我不能想象出一些小问题。

1. 即使查询是正确的它是无法显示在下面的代码中选择的模块：用户选择一个Please Select后才

   <p> 
       <strong>Selected Module:</strong><?php $dbModuleNo;?> - <?php$dbModuleName;?> <input type='hidden' value='<?php$_POST["module"];?>'> 
       </p> 
   

2. 如何显示Please Select Module和Please Select an Assessment消息选项从其中一个相关下拉菜单中提交：

代码在下面（我是commen泰德出查询）：

<form action="" method="post"> 
       <?php    
       /* 
       $moduleactive = 1; 
       $sql = "SELECT ModuleId, ModuleNo, ModuleName FROM Module WHERE ModuleActive = ? ORDER BY ModuleNo"; 

       $sqlstmt=$mysqli->prepare($sql); 
       $sqlstmt->bind_param("i", $moduleactive); 
       $sqlstmt->execute(); 
       $sqlstmt->bind_result($dbModuleId,$dbModuleNo,$dbModuleName); 
       $sqlstmt->store_result(); 
       $sqlnum = $sqlstmt->num_rows(); 
       */ 
       ?> 
       Module: 
       <select name="module" id="modulesDrop"> 
        <option value="">Please Select</option> 
        <?php 
        while($sqlstmt->fetch()) { 
         $ov = $dbModuleNo . "_" . $dbModuleName . "_" . $dbModuleId; 
         if($ov == $_POST["module"]) 
          echo "<option selected='true' value='$ov'>$dbModuleNo - $dbModuleName</option>" . PHP_EOL; 
         else 
          echo "<option value='$ov'>$dbModuleNo - $dbModuleName</option>" . PHP_EOL; 
        } 
        ?> 
       </select> 
       <input id="moduleSubmit" type="submit" value="Submit Module" name="moduleSubmit" /> 
      </form> 
    <?php if(isset($_POST["module"]) && $_POST["module"] != "") { ?> 
      <form action="" method="post"> 
       <p> 
       <strong>Selected Module:</strong><?php $dbModuleNo;?> - <?php$dbModuleName;?> <input type='hidden' value='<?php$_POST["module"];?>'> 
       </p> 
       Asessments: 
       <?php 
       /* 
       $sessionquery = " 
        SELECT s.SessionId, SessionName, SessionDate, SessionTime, ModuleId, SessionActive, Complete 
        FROM Session s 
        INNER JOIN Session_Complete sc ON sc.SessionId = s.SessionId 
        WHERE 
        (ModuleId = ? AND SessionActive = ? AND Complete = ?) 
        ORDER BY SessionName 
        "; 
       $active = 1; 
       $complete = 1; 
       $sessionqrystmt=$mysqli->prepare($sessionquery); 
       // You only need to call bind_param once 
       $sessionqrystmt->bind_param("iii",$moduleId, $active, $complete); 
       // get result and assign variables (prefix with db) 
       $sessionqrystmt->execute(); 
       $sessionqrystmt->bind_result($dbSessionId,$dbSessionName,$dbSessionDate,$dbSessionTime, $dbModuleId, $dbSessionActive, $dbComplete); 
       $sessionqrystmt->store_result(); 
       $sessionnum = $sessionqrystmt->num_rows();   
       */ 

      if ($sessionnum == 0){ ?> 
       <span class='red'>Sorry, You have No Assessments under this Module</span> 
      <?php } else { ?> 
       <select name="session" id="sessionsDrop"> 
        <option value="">Please Select</option> 
        <?php 
         while ($sessionqrystmt->fetch()) { 
          $sv = $dbSessionId; 
          if($sv == $_POST["session"]) 
           echo "<option selected='true' value='$sv'>$dbSessionName - date('d-m-Y',strtotime($dbSessionDate)) - date('H:i',strtotime($dbSessionTime))</option>" . PHP_EOL; 
          else 
           echo "<option value='$sv'>$dbSessionName - date('d-m-Y',strtotime($dbSessionDate)) - date('H:i',strtotime($dbSessionTime))</option>" . PHP_EOL; 
         } 
        ?> 
       </select> 
       <br> 
       <input type="submit" value="Submit Assigments"> 
      </form> 
      <br> 
      <br> 
      <?php 
    if(isset($_POST["session"]) && $_POST["session"] != "") { 

    /* 
      $sessiondetailsquery = " 
       SELECT s.SessionId, SessionName, SessionDate, SessionTime, SessionDuration, SessionWeight, TotalMarks, 
       s.ModuleId, ModuleNo, ModuleName, s.Room, Building, Capacity, SessionActive, Complete, PenaltyEnabled, COUNT(PenaltyMarks) 
       FROM Module m 
       INNER JOIN Session s ON m.ModuleId = s.ModuleId 
       INNER JOIN Session_Complete sc ON sc.SessionId = s.SessionId 
       LEFT JOIN Room r ON s.Room = r.Room 
       LEFT JOIN Penalty p ON s.SessionId = p.SessionId 
       LEFT JOIN Penalty_Marks pm ON s.SessionId = pm.SessionId 
       WHERE 
       (s.SessionId = ?)"; 
      $active = 1; 
      $complete = 1; 
      $sessiondetailsqrystmt=$mysqli->prepare($sessiondetailsquery); 
      // You only need to call bind_param once 
      $sessiondetailsqrystmt->bind_param("i",$dbSessionId); 
      // get result and assign variables (prefix with db) 
      $sessiondetailsqrystmt->execute(); 
      $sessiondetailsqrystmt->bind_result($detailsSessionId,$detailsSessionName,$detailsSessionDate,$detailsSessionTime, $detailsSessionDuration, $detailsSessionWeight, 
      $detailsTotalMarks, $detailsModuleId, $detailsModuleNo, $detailsModuleName, $detailsRoom, $detailsBuilding, $dbCapacity, $detailsSessionActive, $detailsComplete, 
      $dbPenaltyEnabled, $dbCountPenalyMarks);?> 
      */ 
      <h3>CHOSEN ASSESSMENT</h3> 
      <input type='text' id='currentId' name='Idcurrent' readonly='readonly' value='$detailsSessionId' /></td> 
      <br> 
      <strong>Assessment:</strong> <?php $detailsSessionName; ?> 
    <?php } else { ?> 
      <p><strong class='red'>Please Select an Assessment</strong></p> 
    <?php } } } else { ?> 
      <p><strong class='red'>Please Select a Module</strong></p> 
    <?php } ?> 

Answer 1

<strong>Selected Module:</strong> - <?php$dbModuleName;?> <input type='hidden' value='<?php$_POST["module"];?>'> 

这是你的错误。如果您查看源代码，您将看到正在打印PHP代码，因为您没有正确分隔它。试试这个

<strong>Selected Module:</strong> - <?php echo $dbModuleName;?> <input type='hidden' value='<?php echo $_POST["module"];?>'> 

<?php$dbModuleName;?>应该<?php echo $dbModuleName;?>