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Technical Articles

PHP Framework

Laravel

How to work with the query builder in Laravel?

Laravel's query builder provides smooth database interaction methods through the DB facade. 1. Use DB::table('table_name') to start building a query; 2. Common operations include get() to get multiple lines, first() to get single rows, value() to get single values, select() to specify fields, distinct() to deduplicate; 3. Conditional query uses where() series methods, supporting whereBetween, whereIn, whereNull and nested groups; 4. Support join() connection, orderBy() sorting, groupBy() grouping, limit() to limit the number, and count(),

Aug 21, 2025 am 05:36 AM

How to use Laravel Passport for OAuth2 authentication

LaravelPassport is a complete OAuth2 server implementation for easy authentication of API requests in Laravel applications. First install and run the migration through Composer: 1. Execute composerrequirelaravel/passport; 2. Run phpartisanmigrate to create the necessary data table; 3. Use phpartisanpassport:install to generate the encryption key and create the client. Then, Laravel\Passport\HasApiTokenstrait is introduced in the User model to support API authentication. In AuthServic

Aug 21, 2025 am 02:19 AM

How to create a sitemap for a Laravel application

Installthespatie/laravel-sitemappackageusingComposerandpublishitsconfigfileifneeded.2.Createaroutetogenerateandservethesitemapdynamically,eitherbywritingittoafileoroutputtingXMLdirectly.3.CustomizethesitemapbyaddingstaticanddynamicURLs,suchasblogpost

Aug 20, 2025 am 09:16 AM

How to connect Laravel to a database

Configurethe.envfilewithcorrectDB_CONNECTION,DB_HOST,DB_PORT,DB_DATABASE,DB_USERNAME,andDB_PASSWORDvalues;2.Verifythatconfig/database.phpusestheseenvironmentvariablesviaenv()calls;3.TesttheconnectionusingphpartisantinkerwithDB::connection()->getPd

Aug 20, 2025 am 09:00 AM

How to use dependency injection in Laravel

DependencyinjectioninLaravelallowsautomaticresolutionofclassdependenciesviatheservicecontainer,promotingclean,testable,andmaintainablecode.2.Constructorinjectioniscommonlyusedincontrollers,whereLaravelautomaticallyinjectstype-hinteddependencieslikere

Aug 20, 2025 am 08:51 AM

How to set up a database in Laravel?

Configure database connection information in .env files, including DB_CONNECTION, DB_HOST, DB_PORT, DB_DATABASE, DB_USERNAME and DB_PASSWORD; 2. Optionally verify whether the .env variable is correctly referenced in config/database.php; 3. Create a migration file using phpartisanmake:migration and run phpartisanmigrate to generate data tables; 4. Create an Eloquent model through phpartisanmake:model and set the $fillable attribute to support batch assignment; 5. In the routing

Aug 20, 2025 am 07:02 AM

How to test console commands in Laravel

Usetheartisan()methodtoruncommandsandassertExitCode(0)toverifysuccess.2.Forinteractivecommands,useexpectsQuestion()tosimulateuserinputandexpectsOutput()toverifyoutput.3.Passargumentsandoptionsasanarraytoartisan()fortestingCLIparameters.4.UseexpectsOu

Aug 20, 2025 am 06:29 AM

laravel unit test

How to use observers with Eloquent models in Laravel?

Createanobserverusingphpartisanmake:observerUserObserver--model=User.2.Definemethodslikecreated,updated,deletedintheobservertohandleEloquentevents.3.RegistertheobserverinEventServiceProviderbycallingUser::observe(UserObserver::class)inthebootmethod.O

Aug 20, 2025 am 06:18 AM

How to implement event sourcing in Laravel

Understandcoreconceptslikeevents,aggregate,eventstore,andreplaying;2.Createaneventstablewithaggregate_type,aggregate_id,event_type,payload,andversion;3.DefinedomaineventssuchasOrderPlacedandOrderShippedasplainPHPclasses;4.BuildanaggregaterootlikeOrde

Aug 20, 2025 am 03:50 AM

How to create a user profile page in Laravel?

SetupLaravelauthenticationusingLaravelBreezeorsimilar;2.Createaprotectedprofilerouteinweb.php;3.BuildaBladeviewtodisplayuserinformationlikename,email,andjoindate;4.Addaprofilelinkinthenavigationthatappearsonlyforauthenticatedusers;5.Optionally,create

Aug 20, 2025 am 03:18 AM

How to version a Laravel API effectively?

Useurl-Basedversioning (e.g.,/V1,/V2) Simplicityandbetterdeveveloperexperience.2.organizecodebyCreating parateltrollersandr EsourCesforhaacapiversiontopreventbreakingchanges.3.VeragelaraveleksurCestoformatresponsesdifferentlyacross versions, alike

Aug 20, 2025 am 01:44 AM

laravel api version control

How to work with database seeding in Laravel

Database fill is used in Laravel development to quickly insert test or initial data to ensure environmental consistency; first create a fill class using phpartisanmake:seeder, insert data through DB::insert or model factory in the run() method, such as inserting user records; you can specify to run a single filler through phpartisandb:seed--class, or multiple fillers are called sequentially in DatabaseSeeder to handle foreign key dependencies; combined with model factory, a large amount of test data can be generated, and a factory is created using phpartisanmake:factory and define field generation rules, and then call User::

Aug 20, 2025 am 12:03 AM

laravel 數(shù)據(jù)庫填充

How to build a chat application with Laravel

Install Laravel and set up authentication, and quickly build login and registration functions using Breeze or Fortify; 2. Create message table migration and run to store chat content; 3. Configure broadcast drivers as Pusher, install LaravelEcho and PusherJS to implement WebSocket communication; 4. Create Message model and controller, write acquisition and storage message logic, and broadcast new message events; 5. Create MessageSent event class to implement ShouldBroadcastNow interface, specify broadcast channels and data; 6. Define authentication routes in web.php, including chat pages, obtain messages and send message interfaces; 7. Create chat.

Aug 18, 2025 pm 12:00 PM

laravel chat application

How to work with URL generation and signed routes in Laravel?

Laravel provides route() helper function and signature routing function to generate a secure URL; first use route('profile',['id'=>1]) to generate the basic URL; to create a signed route, you need to add ->middleware('signed'); when generating a signed URL, use URL::signedRoute() to create a permanent signature link; use URL::temporarySignedRoute('unsubscribe',now()->addMinutes(30),['user'=>1]) to create a limited-time signature link;

Aug 18, 2025 am 11:34 AM

url generation 簽名路由