Example of uploading photos upimage.php
Function: Upload photos, display uploader, upload time, picture name, picture size, picture description.
Note: 1. Some homepage spaces may not support temporary file operations after uploading, so you can only try another one.
2. The program can automatically create the document photo.txt and the directory image. If it cannot run normally, please create a new document photo.txt (in the same directory as upimage.php) and the directory image.
<HTML>
<HEAD>
<meta http-equiv="Content-Type" c/html; charset=gb2312">
<TITLE>上传照片</TITLE>
<style type="text/css">
<!--
.white12 { font-size: 12pt; color: #FFFFFF; text-decoration: none}
.blue10 { font-size: 10pt; color: #99CCFF; text-decoration: none}
.black10 { font-size: 10pt; text-decoration: none}
-->
</style>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<?php
if （$upload）{ //如果点击"上传"，则执行此php代码部分
if （$picurl=="none"）{
echo "你没有上传任何文件。";
exit; //如果没有上传文件，则退出程序
}
$v=opendir（"image"）；
if （$v==0）
{ mkdir（"image"）； //若目录不存在，则新建一个
$v=opendir（"image"）； //取得目录handle
}
$up=copy（"$picurl","image/$picurl_name"）； //关键一步，将临时文件复制到image目录下
if（$up==1）
{
//文件操作
$fp=fopen（"photo.txt","a"）；//打开文件，以添加方式写入留言
//初始化写入内容
$mydate=date（"Y年m月d日 h:i A"）；
$phot//将换行字元转成 <br>。
$text="照片名：<a href='image/$picurl_name' target='_blank'>$picurl_name</a> <br>照片大小：$picurl_size byte<br> 照片说明：<BR><span>$photonote</span><br> <div align='right'>上传人： $user（$mydate）</div><hr>";
//写入内容
fwrite（$fp,$text,strlen（$text））； //strlin计算$text的字串长度
fclose（$fp）；
echo "文件上传成功！<BR>";
unlink （$picurl）； //从临时文件夹中删除档案$picurl
closedir （$v）； //关闭目录handle
}
else
{echo "文件上传失败。"; exit;} //若上传失败，则退出程序
}
?>
<table width="71%" border="0" cellspacing="0" cellpadding="0" align="center">
<tr bgcolor="#6699FF">
<td>
<div align="center" class="white12">所有照片</div>
</td>
</tr>
<tr>
<td class="black10">
<?php
//显示以往上传照片信息
readfile （"photo.txt"）；
?>
</td>
</tr>
<tr bgcolor="#6699FF">
<td>
<div align="center" class="white12">上传照片</div>
</td>
</tr>
<tr>
<td>
<form action="upimage.php" method="post" enctype="multipart/form-data" name="UL">
<!--注意：这里必须加上‘enctype="multipart/form-data" '，否则不会产生上
传动作-->
<div align="center" class="black10">图片源文件：
<input type="file" name="picurl" size="15" accept="image/x-png,image/gif,image/jpeg">
<br>
照片说明：（不超过50个字）<br>
<textarea name="photonote" cols="50" rows="5"></textarea>
<br>上传人：
<input type="text" name="user" size="10" maxlength="10">
<br>
<input type="Submit" name="upload" value="上传">
<input type="reset" name="Reset" value="重写">
</div>
</form>
<div align="center" class="blue10"><a href="javascript:history.back（）"> 返回</a> </div>
</td>
</tr>
</table>
</BODY>
</HTML>
How can you protect against Cross-Site Scripting (XSS) attacks related to sessions?Apr 23, 2025 am 12:16 AMTo protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.
How can you optimize PHP session performance?Apr 23, 2025 am 12:13 AMMethods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.
What is the session.gc_maxlifetime configuration setting?Apr 23, 2025 am 12:10 AMThesession.gc_maxlifetimesettinginPHPdeterminesthelifespanofsessiondata,setinseconds.1)It'sconfiguredinphp.iniorviaini_set().2)Abalanceisneededtoavoidperformanceissuesandunexpectedlogouts.3)PHP'sgarbagecollectionisprobabilistic,influencedbygc_probabi
How do you configure the session name in PHP?Apr 23, 2025 am 12:08 AMIn PHP, you can use the session_name() function to configure the session name. The specific steps are as follows: 1. Use the session_name() function to set the session name, such as session_name("my_session"). 2. After setting the session name, call session_start() to start the session. Configuring session names can avoid session data conflicts between multiple applications and enhance security, but pay attention to the uniqueness, security, length and setting timing of session names.
How often should you regenerate session IDs?Apr 23, 2025 am 12:03 AMThe session ID should be regenerated regularly at login, before sensitive operations, and every 30 minutes. 1. Regenerate the session ID when logging in to prevent session fixed attacks. 2. Regenerate before sensitive operations to improve safety. 3. Regular regeneration reduces long-term utilization risks, but the user experience needs to be weighed.
How do you set the session cookie parameters in PHP?Apr 22, 2025 pm 05:33 PMSetting session cookie parameters in PHP can be achieved through the session_set_cookie_params() function. 1) Use this function to set parameters, such as expiration time, path, domain name, security flag, etc.; 2) Call session_start() to make the parameters take effect; 3) Dynamically adjust parameters according to needs, such as user login status; 4) Pay attention to setting secure and httponly flags to improve security.
What is the main purpose of using sessions in PHP?Apr 22, 2025 pm 05:25 PMThe main purpose of using sessions in PHP is to maintain the status of the user between different pages. 1) The session is started through the session_start() function, creating a unique session ID and storing it in the user cookie. 2) Session data is saved on the server, allowing data to be passed between different requests, such as login status and shopping cart content.
How can you share sessions across subdomains?Apr 22, 2025 pm 05:21 PMHow to share a session between subdomains? Implemented by setting session cookies for common domain names. 1. Set the domain of the session cookie to .example.com on the server side. 2. Choose the appropriate session storage method, such as memory, database or distributed cache. 3. Pass the session ID through cookies, and the server retrieves and updates the session data based on the ID.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
SublimeText3 English version
Recommended: Win version, supports code prompts!
WebStorm Mac version
Useful JavaScript development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
SublimeText3 Linux new version
SublimeText3 Linux latest version
