无法在PHP中关闭if语句和while循环

时间：2019-10-17 06:31:39

标签： php html

我正在尝试在php“ if语句”内和“ While”循环中显示一些html。 我不断收到意外的文件错误结尾，我知道缺少两个花括号，但是我看不到在哪里正确关闭while循环。 我对编码还是很陌生，所以请保持柔和... :-) 在这里尝试了php语法检查器和其他类似的帖子

<?php include 'includes/header.php';?>
    <!-- Navigation -->
<?php include 'includes/navbar.php';?>
<?php
if (isset($_GET['post'])) {
    $post = $_GET['post'];
    if (!is_numeric($post)) {
      header("location:index.php");

    }
}
else {
    header('location: index.php');
}
$query = "SELECT * FROM posts WHERE id=$post";
$run_query = mysqli_query($conn, $query) or die(mysqli_error($conn)) ;
if (mysqli_num_rows($run_query) > 0 ) {
while ($row = mysqli_fetch_array($run_query)) {
    $post_title = $row['title'];
    $post_id = $row['id'];
    $post_author = $row['author'];
    $post_date = $row['postdate'];
    $post_image = $row['image'];
    $post_content = $row['content'];
    $post_tags = $row['tag'];
    $post_status = $row['status'];
  $img_ext = explode(".", $post_image);
    ?>
    <!-- Page Content -->
    <div class="container">

        <div class="row">

            <!-- Blog Post Content Column -->
            <div class="col-lg-8">

                <!--First Post -->
            <hr>
                <p><h2><a href="#"><?php echo $post_title; ?></a></h2></p>
            <p><h3>by <a href="#"><?php echo $post_author; ?></a></h3></p>
            <p><span class="glyphicon glyphicon-time"></span>Posted on <?php echo $post_date; ?></p>
            <hr>
            <?php if ($img_ext=="mp4"): ?>
                <video controls width="400" height="300">
                <source src="allpostpics/<?php echo $post_image; ?>" type="video/mp4">
                Video tag is not supported in this browser.
                </video>
            <?php else : ?>
                <img class="img-responsive img-rounded" src="allpostpics/<?php echo $post_image; ?>" alt="900 * 300">
                <hr>
                <p><?php echo $post_content; ?></p>
            </div>
            <!-- Blog Sidebar Widgets Column -->
        <div class="col-md-4">
            <?php include 'includes/sidebar.php'; ?>
        </div>
  </div>
        <!-- /.row -->
        <hr>

        <!-- Footer -->
       <?php include 'includes/footer.php';?>
   </div>
     <!-- /.container -->

    <!-- jQuery -->
    <script src="js/jquery.js"></script>

    <!-- Bootstrap Core JavaScript -->
    <script src="js/bootstrap.min.js"></script>
</body>
</html>

3 个答案:

答案 0 :(得分：0)

从语法上讲，PHP与C相比，与Python或VisualBasic更相似。缩进在这里没有任何意义。代码块需要显式打开和关闭。

有两种类型可以引用if-else块，但您都没有使用。

您可以：

使用方括号if { ... } else { ... }

示例：

            <?php if ($img_ext=="mp4") { ?>
                <video controls width="400" height="300">
                <source src="allpostpics/<?php echo $post_image; ?>" type="video/mp4">
                Video tag is not supported in this browser.
                </video>
            <?php } else { ?>
                <img class="img-responsive img-rounded" src="allpostpics/<?php echo $post_image; ?>" alt="900 * 300">
                <hr>
                <p><?php echo $post_content; ?></p>
            <?php } ?>

使用冒号和关键字if，endif

示例

            <?php if ($img_ext=="mp4"): ?>
                <video controls width="400" height="300">
                <source src="allpostpics/<?php echo $post_image; ?>" type="video/mp4">
                Video tag is not supported in this browser.
                </video>
            <?php else: ?>
                <img class="img-responsive img-rounded" src="allpostpics/<?php echo $post_image; ?>" alt="900 * 300">
                <hr>
                <p><?php echo $post_content; ?></p>
            <?php endif ?>

只需选择要去的那个。

类似地，您必须使用方括号}或endwhile关闭while循环，具体取决于您选择的语法。

答案 1 :(得分：0)

您打开了if语句，并且在未关闭时也忘记了关闭它，而在容器关闭后关闭了它

答案 2 :(得分：0)

尝试以下方法：

<?php include 'includes/header.php'; ?>
<!-- Navigation -->
<?php include 'includes/navbar.php'; ?>
<?php
if (isset($_GET['post'])) {
  $post = $_GET['post'];
  if (!is_numeric($post)) {
    header("location:index.php");

  }
} else {
  header('location: index.php');
}
$query = "SELECT * FROM posts WHERE id=$post";
$run_query = mysqli_query($conn, $query) or die(mysqli_error($conn));
if (mysqli_num_rows($run_query) > 0) {
while ($row = mysqli_fetch_array($run_query)) {
$post_title = $row['title'];
$post_id = $row['id'];
$post_author = $row['author'];
$post_date = $row['postdate'];
$post_image = $row['image'];
$post_content = $row['content'];
$post_tags = $row['tag'];
$post_status = $row['status'];
$img_ext = explode(".", $post_image);
?>
<!-- Page Content -->
<div class="container">

    <div class="row">

        <!-- Blog Post Content Column -->
        <div class="col-lg-8">

            <!--First Post -->
            <hr>
            <p>
            <h2><a href="#"><?php echo $post_title; ?></a></h2></p>
            <p>
            <h3>by <a href="#"><?php echo $post_author; ?></a></h3></p>
            <p><span class="glyphicon glyphicon-time"></span>Posted on <?php echo $post_date; ?></p>
            <hr>
          <?php if ($img_ext == "mp4"): ?>
              <video controls width="400" height="300">
                  <source src="allpostpics/<?php echo $post_image; ?>" type="video/mp4">
                  Video tag is not supported in this browser.
              </video>
          <?php else : ?>
            <img class="img-responsive img-rounded" src="allpostpics/<?php echo $post_image; ?>"
                 alt="900 * 300">
          <?php endif; ?>
            <hr>
            <p><?php echo $post_content; ?></p>
        </div>
        <!-- Blog Sidebar Widgets Column -->
        <div class="col-md-4">
          <?php include 'includes/sidebar.php'; ?>
        </div>
    </div>
    <!-- /.row -->
    <hr>

    <!-- Footer -->
  <?php include 'includes/footer.php'; ?>
</div>
<!-- /.container -->

<!-- jQuery -->
<script src="js/jquery.js"></script>

<!-- Bootstrap Core JavaScript -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>
<?php
} // End while
} // End if
  

注意：您的代码缺少<?php endif; ?>，并且末尾有两个大括号。

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