Question

我只是在我重新加载时才在我的php页面中收到错误，有时它也没有任何警告......

我试图创建一个页面，用户可以粘贴其代码并获取共享链接。事情是有效的，但主页上的错误令人讨厌。这是我的完整页面代码：

<?php
header("X-XSS-Protection: 1");
date_default_timezone_set("America/New_York");
function getUserIP()
{
    $client  = @$_SERVER['HTTP_CLIENT_IP'];
    $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
    $remote  = $_SERVER['REMOTE_ADDR'];
    if(filter_var($client, FILTER_VALIDATE_IP))
    {
        $ip = $client;
    }
    elseif(filter_var($forward, FILTER_VALIDATE_IP))
    {
        $ip = $forward;
    }
    else
    {
        $ip = $remote;
    }
    return $ip;
}
$user_ip = getUserIP();
// for generating random filenames
$chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
$namelength = 35;
$randomfilename = '';
for($i = 0; $i < $namelength; $i++)
{
    $randomfilename .= $chars[mt_rand(0, 36)];
}
if($_POST)
{
    $title = $_POST['postTitle'];
    $content = $_POST['postContent'];
    $filename = $randomfilename;
    $fname = $filename;
    $filename = 'pastes/' . $filename . '.html';
    $refresh = "Refresh:0; url=" . $filename;
    $date = date("Y.m.d");
    $time = date("h:i:sa");

    if(strlen($title) > 100)
    {
        echo "<script>alert('Max 100 Characters Allowed!');</script>";
    }
    else if(strlen($title) <= 100)
    {
        $content = nl2br($content);
        $content = filter_var($content, FILTER_SANITIZE_FULL_SPECIAL_CHARS, FILTER_SANITIZE_ENCODED);
        $title = filter_var($title, FILTER_SANITIZE_FULL_SPECIAL_CHARS, FILTER_SANITIZE_ENCODED);
        $fname = filter_var($fname, FILTER_SANITIZE_FULL_SPECIAL_CHARS, FILTER_SANITIZE_ENCODED);
        $link = 'http://openpaste.000webhostapp.com/' . $filename;
        $handle = fopen($filename, "a");
        fwrite($handle, "<html><head><title>" . $fname . "</title><link rel='stylesheet' href='style.css'></head><body><h1>" . $title . "</h1>" . "DATE: " . $date . "<br>TIME: " . $time . "<h2>Your File Link: " . $link . "</h2><p>" . $content . "</p><br></body></html>");
        fclose($handle);

        $f = fopen("ip.txt", "a");
        fwrite($f, $user_ip . "\n");
        fclose($f);
        header($refresh);
    }
}
?>

<html>
<head>
<title>OpenPaste | Home</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link rel="stylesheet" href="overlay.css">
<style>
body{
    margin: 0px;
    font-size: 17px;
}
.nav{
    background-color: royalblue;
    padding: 2px;
    font-family: georgia, sans-serif, tahoma, arial;
}
.nav font,a{
    font-size: 25px;
    text-decoration: none;
}
#icomenu{
    width: 30px;
    height: 30px;
    margin-left: 10px;
    margin-right: 10px;
    border: none;
    border-radius: 5px;
    opacity: 0.7;
}
#icomenu:hover{
    cursor: pointer;
    opacity: 1.0;
    box-shadow: 0px 0px 5px black;
}
.overlay-content a{
    color: #ffffff;
}
.overlay-content a:hover{
    color: yellow;
}
.content{
    margin: 0;
    padding: 1em;
    background-color: firebrick;
}
form{
    margin: 30px 0px 30px 0px;
    font-family: sans-serif, georgia, sans, tahoma, arial;
    font-size: 17px;
}
form input{
    width: 50%;
    text-align:center;
    border:none;
    border-radius: 10px;
    padding: 2px;
    margin-top: 5px;
    font-family: sans-serif, georgia, sans, tahoma, arial;
    font-size: 17px;
    text-shadow: 5px 5px 10px #333;
}
form textarea{
    width: 50%;
    margin-top: 10px;
    border: none;
    border-radius: 10px;
    padding: 2px;
    height: 50%;
    font-family: sans-serif, georgia, sans, tahoma, arial;
    font-size: 17px;
}
form button{
    border: none;
    background-color: lime;
    color: black;
    padding: 5px 25px;
    margin-top: 5px;
    font-family: sans-serif, georgia, sans, tahoma, arial;
    font-size: 17px;
}
form button:hover{
    background-color: royalblue;
    color: white;
    cursor: pointer;
}
</style>
<script type="text/javascript">
function openNav() {
    document.getElementById("myNav").style.width = "100%";
}
function closeNav() {
    document.getElementById("myNav").style.width = "0%";
}
</script>
</head>
<body>

<!-- NAVIGATION -->
<div id="myNav" class="overlay">
    <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">&times;</a>
    <div class="overlay-content">
        <a href="index.php">Home</a><br>
        <a href="https://github.com/NyanSniper101">Our Projects</a><br>
        <a href="about.php">About</a><br>
        <a href="contact.php">Contact</a><br>
    </div>
</div>
<div class="nav">
<img id="icomenu" src="img/menu.png" onclick="openNav();">
<a href="index.php"><font color="white">OpenPaste</font></a>
</div>

<!-- BODY -->
<div class="main">

<div class="content">
<center>
<form action="" method="POST">
<input type="text" name="postTitle" placeholder="Your Title"><br>
<textarea rows="" cols="" name="postContent" placeholder="Your Paste.."></textarea><br>
<button type="submit" name="submit" value="Submit">Create Post</button>
</form>
</center>
</div>

</div>
</body>
</html>

我已尝试将错误消息设置为关闭，但仍想知道我为什么会收到错误消息？以下是错误的图像：Error Image Here。你可以在这里找到我的项目文件：GitHub Project Repo，你认为某些资产正在解决这个问题。

提前致谢：）

编辑：感谢您的回复：D

Answer 1

您需要更改： -

$randomfilename .= $chars[mt_rand(0, 36)];

到

$randomfilename .= $chars[mt_rand(0, strlen($chars)-1)];

因为$chars的最后一个索引是35而不是36（因为它从0索引开始）。

未初始化的字符串偏移量：36仅在重新加载页面

1 个答案: