如何使用php删除特定的txt文件

Question

I've figured out how to make an array of each of my posts so that the txt file is unique, but I'm stuck on trying to figure out how to delete it. This is my progress so far:

Index.php:

      <?php

    $fileNames = glob("*.txt");
    $posts = array();

    foreach($fileNames as $fileName) {
      $post = file($fileName);
      array_push($posts, $post);
    }

    $postNum = 0;
    foreach($posts as $post) {

      $i = 1;
      $fname = $fileNames[$postNum];
      foreach($post as $line) {

        if ($i==1) {
          echo "<h1 style=\"padding: 0px 30px 0px 30px;\">$line</h1>";
        } else {
          echo "<p style=\"padding: 0px 30px 0px 30px; color:#4d4d4d;\">$line</p>";
          echo "<form action=\"deletepost.php\" method=\"get\" style=\"padding: 0px 30px 0px 30px;\"><input type=\"submit\" value=\"Delete Post\"><input type='hidden' name='filename' value='".$fname."'></form>";
        }
        $i++;
      }



      $postNum++;

    }


  ?>

Deletepost.php:

    <?php
session_start();
    if($_SESSION['authenticated'] != true) {
        header("Location: login.php");
        die();
    }

?>

I know I have to use $_REQUEST['filename']; somewhere in deletepost.php, but that's as far as I've gotten. Any help is appreciated. Thanks.

Answer 1

You are looking for unlink function. You can add this logic :

Deletepost.php:

<?php
    session_start();
    if($_SESSION['authenticated'] != true || !isset($_GET['filename'])) {
        header("Location: login.php");
        die();
    }

    $filename = $_GET['filename'];

    if(file_exists($filename)) {
        unlink($filename);
    }
?>

But I strongly advise you to check and recheck the $filename value, and see if the file to delete is not sensible (ex : http://yoursite.com/deletepost.php?filename=../index.php will delete your index.php file !)

Answer 2

您可以在PHP中使用unlink()删除文件，如果成功则返回true，否则返回false。

    if (file_exists($_REQUEST['filename']) unlink($_REQUEST['filename']);