Question

因此，对于一项作业，我必须创建一个表单，用户可以在其中发布乘车份额，以便其他人可以看到并加入他们的乘车。为此，我将表单写入data.txt文件，然后读取文件以在板上显示所有游乐设施。我唯一的问题是，当我获得data.txt的内容时，它们全部组合在一起。我需要能够分别显示每个游乐设施。我将如何去做呢？

到目前为止，这是我的代码：写作：

if (isset($_POST['name'])
              && isset($_POST['email'])
              && isset($_POST['date'])
              && isset($_POST['destination'])
              && isset($_POST['msg'])) {
          $name = $_POST['name'];
          $email = $_POST['email'];
          $date = $_POST['date'];
          $destination = $_POST['destination'];
          $msg = $_POST['msg'];

          //TODO the file write here VV, use 'a' instead of 'w' too ADD to the file instead of REWRITING IT.
          $arr = [$name,$email,$date,$destination,$msg];

          $write = json_encode($arr);
          $file = fopen('data.txt', 'a');
          fwrite($file, $write);
          fclose($file);
      }

阅读内容：

  $path = 'data.txt';
          $handle = fopen($path, 'r');
          $contents = fread($handle, filesize($path));
          echo $contents;
          fclose($handle);

          $newarr = [json_decode($contents)];

          foreach($newarr as $stuff)
          {
            echo $stuff[0];
          }

输出类似于：

["Simon Long","example@gmail.com","2109-01-01T01:01","canada","this is a message"] Simon Long

假设其中有多个帖子，它只会将它们全部打印在一起。我需要一种分隔帖子的方法，以便可以在板上很好地显示它们。

Answer 1

使用多维数组。

$arr = [
    "Simon Long","example@gmail.com","2109-01-01T01:01","canada","this is a message",
    "John Doe","john@gmail.com","2109-01-01T01:01","canada","this is a message",
    "Jane Doe","jane@gmail.com","2109-01-01T01:01","canada","this is a message"
];

然后，当您添加到它时，只需追加到最终数组并替换整个文件即可。

$contents = file_get_contents($path);
$decoded = json_decode($contents);
$decoded[] = [$name,$email,$date,$destination,$msg];
file_put_contents($path, json_encode($decoded)); //replace the entire file.

也请注意。 isset接受多个参数，因此您无需按原样使用它。您可以这样做：

if (isset($_POST['name'], $_POST['email'], $_POST['date'], $_POST['destination'] ...)

清理来自用户的任何输入也是一个好主意。

$name = filter_input(INPUT_POST, 'name', FILTER_SANITIZE_STRING);

需要帮助使用PHP编写和读取文件

1 个答案: