Laravel is a popular PHP framework that provides many convenient features to quickly build web applications. One of the very important features is database support. Laravel can easily integrate with many types of databases, including MySQL, PostgreSQL, SQLite, etc. So where is the database in Laravel?

In fact, in Laravel, the database can be said to be everywhere. It can be configured in the configuration file or called in the code. You can use Laravel's own database operation method or use a third-party database operation tool library. Let’s learn about them one by one.

1. Database configuration file

Laravel’s configuration file is located in the config directory, where the file to configure the database is database.php. In this file, you can set various parameters such as the default database connection, supported database types, database host name, port number, user name, password, etc. For example, as shown below:

<?php

return [

    &#39;default&#39; =>?env('DB_CONNECTION',?'mysql'),

????'connections'?=>?[

????????'mysql'?=>?[
????????????'driver'?=>?'mysql',
????????????'host'?=>?env('DB_HOST',?'127.0.0.1'),
????????????'port'?=>?env('DB_PORT',?'3306'),
????????????'database'?=>?env('DB_DATABASE',?'forge'),
????????????'username'?=>?env('DB_USERNAME',?'forge'),
????????????'password'?=>?env('DB_PASSWORD',?''),
????????????'unix_socket'?=>?env('DB_SOCKET',?''),
????????????'charset'?=>?'utf8mb4',
????????????'collation'?=>?'utf8mb4_unicode_ci',
????????????'prefix'?=>?'',
????????????'strict'?=>?false,
????????????'engine'?=>?null,
????????],

????????//?...

????],

????//?...

];

As can be seen from the above configuration file, Laravel supports multiple database connections and can be configured according to different needs. At the same time, Laravel also supports reading database connection information from environment variables to facilitate switching in different environments.

2. Database operation method

In Laravel, the most commonly used method to operate the database is to use Eloquent ORM, which is Laravel's built-in ORM (object relational mapping) tool for Manipulate database tables and records, allowing developers to use an object-oriented approach to database processing. For example, as shown below:

<?php

namespace?App\Http\Controllers;

use?App\Models\User;
use?Illuminate\Http\Request;

class?UserController?extends?Controller
{
????/**
?????*?Display?a?listing?of?the?resource.
?????*
?????*?@return?\Illuminate\Http\Response
?????*/
????public?function?index()
????{
????????$users?=?User::all();
????????return?view('users.index',?compact('users'));
????}

????//?...
}

In the above code, we query all user data through the User::all() method and pass the results to the viewusers.index Rendering. This saves us the trouble of handwriting SQL statements and allows us to focus more on the implementation of business logic.

In addition, Laravel also provides a variety of database operation methods such as query builder (Query Builder) and original SQL statement execution, which can be selected according to specific needs.

3. Third-party database tool libraries

In addition to using Laravel's own database operation methods, developers can also use various third-party database tool libraries to simplify development, such as Tools such as Laravel Debugbar and Laravel Telescope, or lower-level database operation tool libraries such as Doctrine, DBAL, etc. These tool libraries provide a more convenient way to use, allowing developers to build their own web applications more quickly.

Summary

In Laravel, the database code is scattered in different places, but it is very conveniently integrated into the entire framework. Developers can set database connection information in configuration files, use Eloquent ORM or query builder to operate the database, and use third-party tool libraries to simplify development. These features make Laravel an excellent web development framework.

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