PHP image upload class with image display_PHP tutorial
This is a PHP file upload class with image display. In fact, it can be made into a function. But it is more fun to make it into a class. ~~~~
I should have used JS to verify the uploaded file type. But I was too lazy to do it. .
< ;/form>
Class upload
{
var $upload_name;
var $upload_tmp_address;
var $upload_server_name;
var $upload_filetype;
var $file_type;
var $file_server_address; =350; //To display the height of the image
var $upload_file_size;
var $upload_must_size= 50000; //Allow the size of the uploaded file, set it yourself
function upload_file()
{
$this->upload_name = $_FILES["file"]["name"]; //Get the name of the uploaded file
$this->upload_filetype = $_FILES["file"]["type"];
$this->upload_server_name = date("Y_m_dH_i_s").$this->upload_name;
$this->upload_tmp_address = $_FILES["file"]["tmp_name"]; //Get temporary Address
$this->file_type = array("image/gif","image/pjpeg"); //Types of files allowed to be uploaded
$this->upload_file_size = $_FILES["file"] ["size"]; //The size of the uploaded file
if(in_array($this->upload_filetype,$this->file_type))
{ if($this->upload_file_size upload_must_size)
{
echo("Upload successful, thank you for your support");
$this->file_server_address = "D:usrwwwhtmlupload/".$this->upload_server_name;
Move_uploaded_file ($ this-& gt; upload_tmp_address, $ this- & gt; file_server_address); // Moles
echo ("& lt; IMG sg s RC = $ this-& gt; file_server_address width = $ this- & gt; image_w height = $this->image_h/>"); //Display image
}
else
{
echo("The file size is too large");
}
}
else
{
echo("This file type is not supported, please select again");
}
}
}
$dd = new upload;
$dd->upload_file();
?>
http://www.bkjia.com/PHPjc/317215.html

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi


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

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Dreamweaver CS6
Visual web development tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Notepad++7.3.1
Easy-to-use and free code editor
