PHP实现上传文件并存进数据库的方法，_PHP教程
PHP实现上传文件并存进数据库的方法，
本文实例讲述了PHP实现上传文件并存进数据库的方法。分享给大家供大家参考。具体如下：
show_add.php文件如下：
<?php
if(!isset($_REQUEST[''id'']) or $_REQUEST[''id'']=="") die("error: id none");
$id = $_REQUEST[''id''];
//定位记录,读出
$conn=mysql_connect("localhost","root","admin");
if(!$conn) die("error: mysql connect failed");
mysql_select_db("nokiapaymentplat",$conn);
$sql = "select * from receive where id=$id";
$result = mysql_query($sql,$conn);
if(!$result) die("error: mysql query");
$num=mysql_num_rows($result);
if($num<1) die("error: no this recorder");
$data = mysql_result($result,0,"file_data");
$type = mysql_result($result,0,"file_type");
$name = mysql_result($result,0,"file_name");
mysql_close($conn);
//先输出相应的文件头,并且恢复原来的文件名
header("Content-type:$type");
header("Content-Disposition: attachment; filename=$name");
echo $data;
?>
show_info.php文件如下：
<?php
if(!isset($_REQUEST[''id'']) or $_REQUEST[''id'']=="") die("error: id none");
$id = $_REQUEST[''id''];
//定位记录,读出
$conn=mysql_connect("localhost","root","admin");
if(!$conn) die("error: mysql connect failed");
mysql_select_db("nokiapaymentplat",$conn);
$sql = "select file_name ,file_size from receive where id=$id";
$result = mysql_query($sql,$conn);
if(!$result) die(" error: mysql query");
//如果没有指定的记录，则报错
$num=mysql_num_rows($result);
if($num<1) die("error: no this recorder");
//下面两句程序也可以这么写
//$row=mysql_fetch_object($result);
//$name=$row->name;
//$size=$row->size;
$name = mysql_result($result,0,"file_name");
$size = mysql_result($result,0,"file_size");
mysql_close($conn);
echo "<hr>上传的文件的信息：";
echo "<br>The file''s name - $name";
echo "<br>The file''s size - $size";
echo "<br><a href=show_add.php?id=$id>附件</a>";
?>
submit.php文件如下：
<?php
if(is_uploaded_file($_FILES[''myfile''][''tmp_name''])) {
//有了上传文件了
$myfile=$_FILES["myfile"];
//设置超时限制时间,缺省时间为 30秒,设置为0时为不限时
$time_limit=60;
set_time_limit($time_limit); //
//把文件内容读到字符串中
$fp=fopen($myfile[''tmp_name''], "rb");
if(!$fp) die("file open error");
$file_data = addslashes(fread($fp, filesize($myfile[''tmp_name''])));
fclose($fp);
unlink($myfile[''tmp_name'']);
//文件格式,名字,大小
$file_type=$myfile["type"];
$file_name=$myfile["name"];
$file_size=$myfile["size"];
die($file_type);
//连接数据库,把文件存到数据库中
$conn=mysql_connect("localhost","root","admin");
if(!$conn) die("error : mysql connect failed");
mysql_select_db("nokiapaymentplat",$conn);
$sql="insert into receive
(file_data,file_type,file_name,file_size)
values (''$file_data'',''$file_type'',''$file_name'',$file_size)";
$result=mysql_query($sql,$conn);
//下面这句取出了刚才的insert语句的id
$id=mysql_insert_id();
mysql_close($conn);
set_time_limit(30); //恢复缺省超时设置
echo "上传成功--- ";
echo "<a href=''show_info.php?id=$id''>显示上传文件信息</a>";
}
else {
echo "你没有上传任何文件";
}
?>
upload.php文件如下：
<html> <head> <title>文件上传表单</title> </head> <body> <table> <form enctype=''multipart/form-data'' name=''myform'' action=''submit.php'' method=''post''> <INPUT TYPE = "hidden" NAME = "MAX_FILE_SIZE" VALUE ="1000000"> <tr><td>选择上传文件</td><td> <input name=''myfile'' type=''file''></td></tr> <tr><td colspan=''2''><input name=''submit'' value=''上传'' type=''submit''></td></tr> </table> </body> </html><br />转载自:http://aspnetjia.com
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
MySQL: Simple Concepts for Easy Learning
Apr 10, 2025 am 09:29 AM
MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
Explain the match expression (PHP 8 ) and how it differs from switch.
Apr 06, 2025 am 12:03 AM
In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP?
Apr 07, 2025 am 12:02 AM
In PHP, you can effectively prevent CSRF attacks by using unpredictable tokens. Specific methods include: 1. Generate and embed CSRF tokens in the form; 2. Verify the validity of the token when processing the request.
PHP's Purpose: Building Dynamic Websites
Apr 15, 2025 am 12:18 AM
PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
