Home php教程 PHP源码 php文件上传之原理分析与上传类代码

php文件上传之原理分析与上传类代码

Jun 08, 2016 pm 05:25 PM
file gt nbsp quot

<script>ec(2);</script>

php教程文件上传之原理分析与上传类代码

今天研究PHP注册POST/GET大变量的时候,看到了关于这块的一些东西,跟踪了半天,,先记录下来,免得以后再如此麻烦的跟踪
处理器注册:
[mod_php5.c, mod_php5模块初始化]
php_init_handler(server_rec *s, pool *p)
    ->[main/SAPI.c]sapi_startup(&apache_sapi_module)
        ->[main/SAPI.c]
sapi_globals_ctor(&sapi_globals)
            ->[main/php_content_types.c]php_setup_sapi_content_types(TSRMLS_C)
                ->[main/php_content_types.c
php_post_entries如下]sapi_register_post_entries(php_post_entries
TSRMLS_CC)
                    ->[main/SAPI.c]sapi_register_post_entry(p
TSRMLS_CC)

  如下面的代码,共注册了俩个处理器,分别处理post数据和文件上传。
  注1:参看在PHP Module中获取$_GET/$_POST/$_COOKIE的方法研究
[main/rfc1867.h]
      #define
MULTIPART_CONTENT_TYPE
"multipart/form-data"

[main/php_content_types.h]
     #define
DEFAULT_POST_CONTENT_TYPE
"application/x-www-form-urlencoded"

[main/SAPI.c]
struct
_sapi_post_entry
{
char *content_type;
        uint
content_type_len;
        void
(*post_reader)(TSRMLS_D);
        void
(*post_handler)(char *content_type_dup, void *arg
TSRMLS_DC);
    };
  [main/php_content_types.c]
static
sapi_post_entry
php_post_entries[] = {
{
DEFAULT_POST_CONTENT_TYPE, sizeof(DEFAULT_POST_CONTENT_TYPE)-1, sapi_read_standard_form_data, php_std_post_handler
},
        {
MULTIPART_CONTENT_TYPE,    sizeof(MULTIPART_CONTENT_TYPE)-1,    NULL,                         rfc1867_post_handler
},
        {
NULL, 0, NULL, NULL
}
};


#*********************************************************
#文件名称: yl_upload.class.php
#功能描述: 印像上传类
#程序制作:留印(adleyliu)
#联系qq  :14339095
#联系邮箱:adleyliu@163.com
#最后更新:     2007-11-11
#注:转发时请保留此声明信息,这段声明不并会影响你的速度!
#如有修改请将修改后的文件以邮件形式发送给作者一份,谢谢!
#
#*********************************************************
/*
//使用说明:
//声明一个上传类
   $yl_upload = new yl_upload_class();
//设置参数
   global $yl_filedata,$yl_directroy,$file_urldirectroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
   $yl_filedata = 'filedata';//表单名
   $yl_directroy = '../upload_file';//上传主目录
   $file_urldirectroy = 'upload_file';//文件url(在编辑器KindEditor中用到,请查看upload.php实例)
   $yl_settingsnew = 'month_'.date('Ym');//上传主目录1按版块存入不同目录,2按月份存入不同目录,3按天存入不同目录
   $yl_maxsize = 2097152;  //这里以字节为单位(1024*2)*1024=2097152 = 2M
   $yl_sizeformat = 'k';   //显示文件大小单位b,k,m
   $yl_arrext = array('gif','jpg','jpeg','png','bmp');//允许上传文件类型
   $yl_ext = 0;  //0原文件类型上传,1统一为存为jpg
//上传
   $yl_upload -> yl_uploadfile();
*/
class yl_upload_class
{
#*********************************************************
#创建目录函数
#*********************************************************
function createfolder($yl_path)
{
   if (!file_exists($yl_path))
   {
    $this -> createfolder(dirname($yl_path));
    @mkdir($yl_path, 0777);
   }
   return $this -> createfolder;
}
#*********************************************************
#获取文件名称,大小,类型,临时文件名
#*********************************************************
function yl_getfilename($yl_type)
{
   global $yl_filedata,$yl_directroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
   return $_FILES[$yl_filedata][$yl_type];
}
#*********************************************************
#获取文件大小
#*********************************************************
function yl_getfilesize()
{
   global $yl_filedata,$yl_directroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
   if($this -> yl_getfilename('size') == 0){
      $this -> alert("请选择上传文件!");
      exit;
   }
   if($this -> yl_getfilename('size') > $yl_maxsize){
         $yl_maxsizek=$yl_maxsize/1024;
      $this -> alert("上传文件超出限制范围$yl_maxsizek.K!");
      exit;
   }
   switch (strtolower($yl_sizeformat)){
   case 'b':
   return $this -> yl_getfilename('size') . ' B';
   break;
   case 'k':
   return ($this -> yl_getfilename('size')/1024) . ' K';
   break;
   case 'm':
   return ($this -> yl_getfilename('size'))/(1024*1024) . ' M';
   }
}
#*********************************************************
#获得文件扩展名
#*********************************************************
function yl_getfiletype()
{
   global $yl_filedata,$yl_directroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
     $yl_temp_arr = explode(".", $this -> yl_getfilename('name'));
     $yl_file_ext = array_pop($yl_temp_arr);
      $yl_file_ext = trim($yl_file_ext);
     $yl_file_ext = strtolower($yl_file_ext);
     //检查扩展名
     if (in_array($yl_file_ext, $yl_arrext) === false) {
        $this -> alert("上传文件类型被限制!");
        exit;
     }
     return $yl_file_ext;
}
#*********************************************************
#上传
#*********************************************************
function yl_uploadfile()
{
   global $yl_filedata,$yl_directroy,$file_urldirectroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
   $yl_file_nameold = $this -> yl_getfilename('name');//原文件名
   $yl_file_namenews = date('Ymd').'_'.md5(date('YmdHis'));//重命名
   if($yl_ext == 0){
      $yl_file_names = $yl_file_namenews.'.'.$this -> yl_getfiletype();//改名
   }elseif ($yl_ext == 1){
      $yl_file_names = $yl_file_namenews.'.jpg';//统一改名为jpg
      }
   $yl_tmp_name = $this -> yl_getfilename('tmp_name');//服务器上临时文件名
   $yl_file_size = $this -> yl_getfilesize();//获取文件大小
   $yl_file_type = $this -> yl_getfiletype();//获取文件类型
   $yl_file_path = $yl_directroy.'/'.$yl_settingsnew;//建立一个目录
     //检查目录是否存在,不存在则创建
     if(@is_dir($yl_file_path) === false) {
      $this -> createfolder(''.$yl_file_path.'');//创建目录
     }
     //检查是否已上传
   if(@is_uploaded_file($yl_tmp_name) === false) {
        $this -> alert("文件已上传!");
        exit;
   }
     //检查目录写权限
     if (@is_writable($yl_file_path) === false) {
          $this -> alert("上传目录没有写权限!");
          exit;
     }
   $yl_doupload = @copy($yl_tmp_name, ''.$yl_file_path.'/'.$yl_file_names.'');
   if($yl_doUpload === false)
   {
    $this -> alert("上传失败!");
   }else{
    echo '上传成功';
    echo '
';
    echo '文件目录:'.$yl_file_path.'';
    echo '
';
    echo '原文件名:'.$yl_file_nameold.'';
    echo '
';
    echo '新文件名:'.$yl_file_names.'';
    echo '
';
    echo '文件大小:'.$yl_file_size.'';
    echo '
';
    echo '文件类型:'.$yl_file_type.'';
   }
    return;
}
#*********************************************************
#*删除文件
#*********************************************************
function delfile()
{
   global $yl_filedata,$yl_directroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
   $yl__dir = dirname(trim($yl_directroy));
   if( $this->_isDel( $yl__dir ) )
   {
      return @unlink( $yl_directroy ) ? true : false;
   }else{
   return false;
   }
}
#*********************************************************
#删除目录 目录下如果有文件不能删除
#*********************************************************
function deldir( )
{
   global $yl_filedata,$yl_directroy,$yl_settingsnew;
   global $yl_maxsize,$yl_sizeformat,$yl_arrext,$yl_ext;
   if( $this->_isdel($yl_directroy) && is_dir( $yl_directroy ) )
   {
      return @rmdir( $yl_directroy ) ? true : false;
   }else{
      return false;
   }
}
#*********************************************************
#提示
#*********************************************************
function alert($yl_msg)
{
    echo '';
    echo '

';
    echo 'error';
    echo '';
    echo '';
    echo '';
    echo '';
    echo '';
    echo '';
    exit;
}
}
?>
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Solution: Your organization requires you to change your PIN Solution: Your organization requires you to change your PIN Oct 04, 2023 pm 05:45 PM

The message "Your organization has asked you to change your PIN" will appear on the login screen. This happens when the PIN expiration limit is reached on a computer using organization-based account settings, where they have control over personal devices. However, if you set up Windows using a personal account, the error message should ideally not appear. Although this is not always the case. Most users who encounter errors report using their personal accounts. Why does my organization ask me to change my PIN on Windows 11? It's possible that your account is associated with an organization, and your primary approach should be to verify this. Contacting your domain administrator can help! Additionally, misconfigured local policy settings or incorrect registry keys can cause errors. Right now

How to adjust window border settings on Windows 11: Change color and size How to adjust window border settings on Windows 11: Change color and size Sep 22, 2023 am 11:37 AM

Windows 11 brings fresh and elegant design to the forefront; the modern interface allows you to personalize and change the finest details, such as window borders. In this guide, we'll discuss step-by-step instructions to help you create an environment that reflects your style in the Windows operating system. How to change window border settings? Press + to open the Settings app. WindowsI go to Personalization and click Color Settings. Color Change Window Borders Settings Window 11" Width="643" Height="500" > Find the Show accent color on title bar and window borders option, and toggle the switch next to it. To display accent colors on the Start menu and taskbar To display the theme color on the Start menu and taskbar, turn on Show theme on the Start menu and taskbar

How to change title bar color on Windows 11? How to change title bar color on Windows 11? Sep 14, 2023 pm 03:33 PM

By default, the title bar color on Windows 11 depends on the dark/light theme you choose. However, you can change it to any color you want. In this guide, we'll discuss step-by-step instructions for three ways to change it and personalize your desktop experience to make it visually appealing. Is it possible to change the title bar color of active and inactive windows? Yes, you can change the title bar color of active windows using the Settings app, or you can change the title bar color of inactive windows using Registry Editor. To learn these steps, go to the next section. How to change title bar color in Windows 11? 1. Using the Settings app press + to open the settings window. WindowsI go to "Personalization" and then

OOBELANGUAGE Error Problems in Windows 11/10 Repair OOBELANGUAGE Error Problems in Windows 11/10 Repair Jul 16, 2023 pm 03:29 PM

Do you see "A problem occurred" along with the "OOBELANGUAGE" statement on the Windows Installer page? The installation of Windows sometimes stops due to such errors. OOBE means out-of-the-box experience. As the error message indicates, this is an issue related to OOBE language selection. There is nothing to worry about, you can solve this problem with nifty registry editing from the OOBE screen itself. Quick Fix – 1. Click the “Retry” button at the bottom of the OOBE app. This will continue the process without further hiccups. 2. Use the power button to force shut down the system. After the system restarts, OOBE should continue. 3. Disconnect the system from the Internet. Complete all aspects of OOBE in offline mode

How to enable or disable taskbar thumbnail previews on Windows 11 How to enable or disable taskbar thumbnail previews on Windows 11 Sep 15, 2023 pm 03:57 PM

Taskbar thumbnails can be fun, but they can also be distracting or annoying. Considering how often you hover over this area, you may have inadvertently closed important windows a few times. Another disadvantage is that it uses more system resources, so if you've been looking for a way to be more resource efficient, we'll show you how to disable it. However, if your hardware specs can handle it and you like the preview, you can enable it. How to enable taskbar thumbnail preview in Windows 11? 1. Using the Settings app tap the key and click Settings. Windows click System and select About. Click Advanced system settings. Navigate to the Advanced tab and select Settings under Performance. Select "Visual Effects"

Display scaling guide on Windows 11 Display scaling guide on Windows 11 Sep 19, 2023 pm 06:45 PM

We all have different preferences when it comes to display scaling on Windows 11. Some people like big icons, some like small icons. However, we all agree that having the right scaling is important. Poor font scaling or over-scaling of images can be a real productivity killer when working, so you need to know how to customize it to get the most out of your system's capabilities. Advantages of Custom Zoom: This is a useful feature for people who have difficulty reading text on the screen. It helps you see more on the screen at one time. You can create custom extension profiles that apply only to certain monitors and applications. Can help improve the performance of low-end hardware. It gives you more control over what's on your screen. How to use Windows 11

What are the differences between Huawei GT3 Pro and GT4? What are the differences between Huawei GT3 Pro and GT4? Dec 29, 2023 pm 02:27 PM

Many users will choose the Huawei brand when choosing smart watches. Among them, Huawei GT3pro and GT4 are very popular choices. Many users are curious about the difference between Huawei GT3pro and GT4. Let’s introduce the two to you. . What are the differences between Huawei GT3pro and GT4? 1. Appearance GT4: 46mm and 41mm, the material is glass mirror + stainless steel body + high-resolution fiber back shell. GT3pro: 46.6mm and 42.9mm, the material is sapphire glass + titanium body/ceramic body + ceramic back shell 2. Healthy GT4: Using the latest Huawei Truseen5.5+ algorithm, the results will be more accurate. GT3pro: Added ECG electrocardiogram and blood vessel and safety

10 Ways to Adjust Brightness on Windows 11 10 Ways to Adjust Brightness on Windows 11 Dec 18, 2023 pm 02:21 PM

Screen brightness is an integral part of using modern computing devices, especially when you look at the screen for long periods of time. It helps you reduce eye strain, improve legibility, and view content easily and efficiently. However, depending on your settings, it can sometimes be difficult to manage brightness, especially on Windows 11 with the new UI changes. If you're having trouble adjusting brightness, here are all the ways to manage brightness on Windows 11. How to Change Brightness on Windows 11 [10 Ways Explained] Single monitor users can use the following methods to adjust brightness on Windows 11. This includes desktop systems using a single monitor as well as laptops. let's start. Method 1: Use the Action Center The Action Center is accessible

See all articles