Laravel 5.2 example sharing about. env files with model operations

Source: Internet
Author: User

I. ENV file

An. env file is an app's environment profile that is used when configuring application parameters, database connections, and cache processing .


Apply relevant parameters App_env=localapp_debug=true//   application Debug mode app_key=base64:hmyz0bmjdjarkgrmav93yqy/p9satnv8m0kt4lvjr5w=// Apply keyapp_url=http://localhost//Database connection parameters db_connection=mysqldb_host=127.0.0.1db_port=3306db_database= laravelblogdb_username=rootdb_password=db_prefix= ' hd_ '//cache related parameters Cache_driver=filesession_driver=filequeue_driver =sync//Redis Connection Parameters redis_host=127.0.0.1redis_password=nullredis_port=6379//message related parameters mail_driver=smtpmail_host= Mailtrap.iomail_port=2525mail_username=nullmail_password=nullmail_encryption=null

Among them, the explanation about this App_key , in the config/app.php file has the following comment:


/*|--------------------------------------------------------------------------| Encryption key|--------------------------------------------------------------------------| | This key was used by the illuminate Encrypter service and should be set| To a random, character string, otherwise these encrypted strings| Won't is safe. Before deploying an application!| */' key ' = env (' App_key '), ' cipher ' = ' AES-256-CBC ',

The key key reads the App_key of the. env file, typically a 32-bit random string. The cipher key determines the length of the App_key , typically aes--CBC (the default) denotes a key length of 32 characters, or aes- -CBC represents 16 bits.

Therefore, to ensure the security of the session and cryptographic Services, the App_key must be set and generated using the Artisan command:


PHP Artisan Key:generate

In this way, a new App_key is written to the. env file.

Second, model operation

1. DB class


Insert Db::insert (' INSERT into hd_user (username, password) VALUES (?,?) ', [' admin ', 123456]);//Query Db::select (' SELECT * FROM Hd_user where username =? ', [' admin ']);//Update db::update (' Update hd_user set password=? where Username =? ', [654321, ' Ad Min ']);//delete db::d elete (' delete from hd_user where username =? ', [' admin ']);

Note: the DD () function is similar to Print_r (), which is used to print variable information and is an auxiliary function of Laravel.

2. Query Builder

The table method of the DB class returns a query builder for the given table.


Query all db::table (' user ')->get ();//Query multiple db::table (' user ')->where (' Age ', ' > ')->get ();//Query a db::table (' user ')->where (' Age ', ' > ', '->first ');//Query specific field db::table (' user ')->select (' name ', ' email as User_ Email ')->get ()//Distinct () method to repeat $users = db::table (' user ')->distinct ()->get ();

  

3. Eloquent ORM

1. Create a model


PHP Artisan Make:model User

2. Table name, primary key, timestamp

Table name: The complex number of the default model class name is used as the table name and can be overridden by defining protected $table properties in the Model class.

Primary key: The default primary key name is "id" and can be overridden by defining the protected $primaryKey property in the Model class.

Timestamp: The Created_at and Updated_a fields are managed by default and can be defined in the Model class $timestamps property is False.

3. Data manipulation

In the Controller method:


//Insert $user = new User; $user->username = ' admin '; $user->save ();//Query// Query all User::get ();//Query multiple User::where (' age ', ' > ', ' 1 ')->get ();//Query a user::find ();//Update $user = User::find (1);         Find a record with primary key 1 $user->username = ' new name '; $user->save (); or use the update () method//delete//Method 1. First get the record and then delete user::find (1)->delete ();//Method 2. Delete user directly via primary key::d Estroy (1, 2);//Method 3. Through where Conditional delete user::where (' username ', ' admin ')->delete (); 
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