javascript - $_POST ['projectSubmit'] 不工作

Question

在点击提交按钮后，我尝试回显 JavaScript 以确保其正常工作，但它只会关闭模式并刷新页面。怎么了？我也尝试过'if($_POST[projectSubmit'] 而是将其包含在 isset() 上。但它无法识别索引 'projectSubmit'

<form action="" method="POST">
<div id="modal1" class="modal modal-fixed-footer" style="width:35%;">
    <div class="modal-content">
      <h4>Create Project</h4>
<div class="row">

      <div class="input-field col s12">
            <i class="material-icons prefix">perm_identity</i>
            <input type="text" name="projectName" class="validate">
            <label for="projectName" class="">Project Name</label>
      </div>

      <div class="input-field col s12">
            <i class="material-icons prefix">room</i>
            <label for="projectLocation">Location</label>
            <input type="text" name="projectLocation">
      </div>

      <div class="input-field col s12">
            <label for="projectType">Project Type</label><br>
            <input name="projectType" type="radio" value="Condominium" id="test1" />
            <label for="test1" class="black-text">Condominium</label>

            <input name="projectType" type="radio" value="Housing"      id="test2" />
            <label for="test2" class="black-text">Housing</label>
      </div>

</div><!--ROW-->


    </div>
    <div class="modal-footer">
      <input type="submit" name="projectSubmit"class="waves-effect waves-green btn-flat" value="s">
      <button type="RESET" class="btn btn-flat">RESET</button>
    </div>
  </div>
  <?php
if(isset($_POST['projectSubmit'])){
echo "<script type='text/javascript>alert('JUJU');</script>";

}
else{
echo "<script type='text/javascript>alert('xx');</script>";
}


?>


</form>

Answer 1

您尚未完成 text/javascript 后面的单引号。请更新如下:

echo "<script type='text/javascript'>alert('JUJU');</script>";

与更新第二个 echo 相同:

echo "<script type='text/javascript'>alert('xx');</script>";