


[Laravel] Laravel's basic database operation part, laravel database_PHP tutorial
Jul 12, 2016 am 08:54 AM[Laravel] The basic database operation part of Laravel, laravel database
[laravel] The database configuration of laravel
Find the .env file under the program directory structure
Configure basic database connection information
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=blog
DB_USERNAME=root
DB_PASSWORD=root
After modifying the .env file, you need to restart the service
[laravel] Getting started with the database of laravel
Import the DB database operation class into the controller, use DB
Use the static method select of the DB class to query the database, DB::select(), parameters: sql statement, parameter value array
For example: $user=DB::select("select * from article where id=?",array("1"));
Get an array, each result in the array is a StdClass object
<?<span>php namespace App\Http\Controllers\Index; </span><span>use</span><span> App\Http\Controllers\Controller; </span><span>use</span><span> DB; </span><span>class</span> IndexController <span>extends</span><span> Controller{ </span><span>public</span> <span>function</span><span> index(){ </span><span>$data</span>=<span>array</span><span>(); </span><span>$data</span>['title']="Index控制器"<span>; </span><span>//</span><span> 第一種</span> <span>$user</span>=DB::select("select * from article where id=?",<span>array</span>("1"<span>)); </span><span>foreach</span> (<span>$user</span> <span>as</span> <span>$v</span><span>) { </span><span>echo</span> <span>$v</span>-><span>title; } </span><span>//</span><span> 第二種</span> <span>$users</span>=DB::table("article")-><span>get(); </span><span>foreach</span> (<span>$user</span> <span>as</span> <span>$v</span><span>) { </span><span>echo</span> <span>$v</span>-><span>title; } </span><span>return</span> view("index.index",<span>$data</span><span>); } }</span>
Use Query Builder
Use DB::table() to get the query constructor object, parameters: table name
Call the get() method of the Builder object to get the array data
For example: $users=DB::table("article")->get();
The query constructor is called in a chain. There are other methods, you can check the documentation
[laravel] Database migration
Use Artisan command to create migration, make:migration name –create table name
For example: php artisan make:migration create_users_table --create=users
This command will create a migration file under the database/migrations directory
Open the generated migration file and create fields in the up method. The database structure constructor Schema will be used here
Run the migration command, use the command php artisan migrate, the table will be automatically created in the database
[laravel] EloquentModel
Use the Eloquent model to create a mapping model ORM for the table, and use the Artisan command make:model model name
For example: php artisan make:model User
Generate a User.php model file in the app directory

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