search
HomeBackend DevelopmentPHP TutorialPHP file upload class and detailed explanation (1/2)_PHP tutorial

PHP file upload class and detailed explanation (1/2)_PHP tutorial

Jul 20, 2016 am 11:09 AM
dirphptmpuploadandparameterTutorialdocumentComparekindDetailed explanationthisconductConfiguration

The upload_tmp_dir parameter in the PHP tutorial configuration is compared. If the file is in this directory, then move_uploaded_file will perform the move operation. Moreover, this comparison is case-sensitive, and / is also different under Windows. When the PHP configuration file is parsed, a realpath function will be called. That is to say, before you move_uploaded_file,


must pair $file['tmp_name'] = realpath($file[' tmp_name']); realpath.


There is another situation that everyone should pay attention to, that is, if move_uploaded_file is configured as an inaccessible path, then no matter how you handle it, move_uploaded_file will never successfully move the file.


When uploading files, you cannot move files using the move_uploaded_file function, but you can use copy or rename.


I’ve been confused too. In the document, it is rather vague. It is the function move_uploaded_file, which adds a step to check whether the file was uploaded by http post.


The following I found a file upload class on the Internet

**File upload class**/

class upload_file
{
/**statement**/
var $upfile_type,$upfile_size,$upfile_name,$upfile;
var $d_alt,$extention_list,$ tmp,$arri;
var $datetime,$date;
var $filestr,$size,$ext,$check;
var $flash_directory,$extention,$file_path,$base_directory;
var $url; //Jump path after successful file upload;

function upload_file()
{
/**Constructor**/
$this->set_url(" index.php"); //Initialize the jump path after successful upload;
$this->set_extention(); //Initialize the extension list;
$this->set_size(50); // Initialize the kb limit of uploaded files;
$this->set_date(); ;set_base_directory("attachmentfile"); //Initialization file upload root directory name, can be modified! ;
}

/**File type**/
function set_file_type($upfile_type)
{
$this->upfile_type = $upfile_type; //Get the file type ;
}

/**Get file name**/
function set_file_name($upfile_name)
{
$this->upfile_name = $upfile_name; //Get the file name ;
}

/**Get file**/
function set_upfile($upfile)
{
$this->upfile = $upfile; //Get the file in The name of the temporary file stored on the server; upfile_size; //Get file size;
}

/**Get file size**/
function set_url($url)
{
$this->url = $ url;                      //Set the jump path after successfully uploading the file; ;extention = preg_replace('/.*.(.*[^.].*)*/iu','1',$this->upfile_name); //Get the file extension;
}

/**Set the jump path after successful file upload**/
function set_datetime()
{
$this->datetime = date("ymdhis"); //Generate file name by time;
}

/**Get file extension**/
function set_date()
{
$this->date = date("y-m-d"); //Generate directory by date Name;
}

/**Initialization allows uploadingSet file name**/
function set_extension()
{
$this->extension_list = "doc|xls|ppt |avi|txt|gif|jpg|jpeg|bmp|png"; //Extension name allowed to be uploaded by default;
}

/**Set directory name**/
function set_size($ size)
{
$this->size = $size; function set_base_directory($directory)
{
$this->base_directory = $directory; //Generate file storage root directory;
}

/**Initialize allowed upload file types**/
function set_flash_directory()
{
$this->flash_directory = $this->base_directory."/".$this->date; //Generate file storage subdirectory;
}

/**Set maximum upload kb limit**/
function showerror($errstr="Unknown error! "){
echo "";
exit();
}

/**Initialization file storage root directory**/
function go_to($str,$url)
{
echo "";
exit();
}

/**If the root directory is not created, create the file storage directory**/
function mk_base_dir()
{
if (! file_exists($this->base_directory )){ //Check whether the root directory exists;
@mkdir($this->base_directory,0777); //Create if it does not exist;
}
}

/* *If the subdirectory is not created, create the file storage directory**/
function mk_dir()
{
if (! file_exists($this->flash_directory)){ //Check whether the subdirectory exists;
@mkdir($this ->flash_directory,0777); //Create if does not exist;
}
}

/**Get the decomposed file types allowed to be uploaded in the form of an array**/
function get_compare_extention()
{
$this->ext = explode("|",$this->extention_list);//Use "|" to explode the default extension;
}

/**Check whether the extension is in violation* */
function check_extension()
{
for($i=0;each($this->ext);$i++) //Traverse the array;
{
if( $this->ext[$i] == strtolower($this->extension)) //Compare the file extension to see if it matches the default allowed extension;
{
$this->check = true; ".$this->extention_list." One of them! ");}
// Warning if not matched
}

/**Check whether the file size exceeds the standard**/
function check_size()
{
if($this-> ;upfile_size > round($this->size*1024)) //Whether the file size exceeds the default size;
{
$this->showerror("Uploaded attachments must not exceed".$ this->size."kb"); //Warn if exceeded;
}
}

/**Full file access path**/
function set_file_path()
{

$this->file_path = $this->flash_directory."/".$this->datetime.".".$this->extension; //Generate complete file access path;

}

/**Upload file**/
function copy_file()
{
if(copy($this->upfile,$this->file_path)){ / /Upload file;
print $this->go_to("The file has been uploaded successfully!",$this->url); //Uploaded successfully;
}else {
print $this-> ;showerror("Unexpected error, please try again!"); //Upload failed;
}
}

/**Complete save**/
function save()
{
$this->set_flash_directory(); //Initialize the file upload subdirectory name;
$this->get_extention(); //Get the file extension;
$this-> get_compare_extention(); //Use "|" to decompose the default extension;
$this->check_extention(); //Detect whether the file extension is in violation;
$this->check_size(); / /Check whether the file size exceeds the limit;
$this->mk_base_dir(); //If the root directory does not exist, create it;
$this->mk_dir(); //If the subdirectory does not exist, then create;


1 2

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/444804.htmlTechArticleThe upload_tmp_dir parameter in the php tutorial configuration is compared. If the file is under this directory, then move_uploaded_file will be moved. operate. And this comparison is case-sensitive...
Statement
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
The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages ​​that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

See all articles

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

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools