Question

我用php创建了一个聊天室，我希望能够添加评论帖子的能力，为此，我需要能够在php中的短语后找到一个数字。

该短语将始终为“这是帖子号码：”但该号码会根据您正在查看的帖子的帖子编号而变化。

下面，我有将格式化用户输入插入.txt文件的代码：

 //increases the post number by 1
      $post_num = file_get_contents("post_num.txt");
      $post_num ++;
      file_put_contents("post_num.txt", $post_num);
 //writes message to file
      file_put_contents('posts.txt', "<div class='post'><div class='title'><b>" . $title . "</b></div>" . $postimg . "<div class='message'>" . showBBcodes($message) . "</div><div class='footer'>Posted By: " . $username . "<br> This is post number: " . $post_num . "</div><form action='finish_comment.php' method='post'><input placeholder='comment' name='comment'><input type='submit' value='comment'></form></div><br> \n", FILE_APPEND);
 //redirects the user back to posts.php
      echo "<script>location.href = 'posts.php'</script>";

带有帖子编号的短语位于以下代码中：

<div class='footer'>Posted By: " . $username . "<br> This is post number: " . $post_num . "</div>

如何使用php在文本文件中的短语后找出一个数字

0 个答案: