Laravel快速开发后端API指引一

laravel安装

1.环境要求安装LNMP开发环境，推荐使用宝塔
2.composer global require “laravel/installer”
3.如果缺少vendor文件，使用composer install
4.应用程序生成秘钥 php artisan key:generate
5,本教程基于laravel5.5

laravel配置文件

复制项目目录下的配置文件 cp .env.example .env
修改 .env文件

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=databasename
DB_USERNAME=username
DB_PASSWORD=password

laravel get 示例

vim routes/web.php

<?php
//测试get API参数传递
Route::get('/user/{name}', 'Controller@index');

vim app/Http/Controllers/controller.php

use Illuminate\Http\Request;
class Controller extends BaseController
{

    /**添加参数校验
     *测试get请求
     * @param $name
     */
    public function index(Request $request, $name)
    {
       $env = App::environment();        //环境变量
       $res =  ['name'=>$name];
       return response()->json($res);
    }
}

postman进行测试

laravel post 示例

vim routes/web.php

//测试postAPI参数
Route::post('test', 'Controller@test');

vim app/Http/Controllers/controller.php

use Illuminate\Http\Request;
class Controller extends BaseController
{

   /**
     * 测试post请求
     * @param $name $age
     */
    public function test(Request $request)
    {
        $name = $request->input('name');
        $age = $request->input('age');
        $result['name'] = $name . $age;
        return response()->json($result);
    }
}

postman请求测试

laravel mysq mvc操作

新建文件夹 /app/Models
创建model文件 php artisan make:models Test
vim /app/Models/Test.php

use Illuminate\Database\Eloquent\Model;
use DB;

class Test extends Model
{
    /**
     * 测试方法调用
     * model 层数据库调用
     */
    public function getData()
    {
        //原生sql操作
        $users = DB::select('select * from user', [1]);
        //ORM
        $data = DB::table('user')->get()->getList();//对象转为数组
        $res = $data[0]['id'];
        return $res;
    }

vim app/Http/Controllers/Controller.php

use Illuminate\Support\Facades\DB;
use Illuminate\Http\Request;
use App\Models\Test;//测试model类
use Predis;

class Controller extends BaseController
{
    public function test()
        {
            $Test = new Test; //初始化类
            $res['data'] = $Test->getData();
            return response()->json($res);
        }
}

laravel redis连接

laravel官方推荐使用composer安装predis
本示例使用phpredis（c扩展）
修改配置文件config/database.php
修改redis别名config/app.php

'redis' => [
        'client' => 'phpredis', //由pedis修改为phpredis
        'default' => [
            'host' => env('REDIS_HOST', '127.0.0.1'),
            'password' => env('REDIS_PASSWORD', null),
            'port' => env('REDIS_PORT', 6379),
            'database' => 0,
            'read_timeout' => 60,
        ],
    ],

//'Redis' => Illuminate\Support\Facades\Redis::class,
'Predis' => Illuminate\Support\Facades\Redis::class,

测试redis连接

use Predis；

class Controller extends BaseController
{

   /**
     * 测试redis连接
     * @param $name $age
     */
    public function test()
    {
      $data = Predis::connection();
        var_dump($data);
    }
}

laravel连接多个数据库配置

添加配置文件
vim config/database.php

'mysql' => [
            'driver' => 'mysql',
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', ''),
            'username' => env('DB_USERNAME', ''),
            'password' => env('DB_PASSWORD', ''),
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'strict' => true,
            'engine' => null,
        ],
        'mysql_center' => [
            'driver' => 'mysql',
            'host' => env('DB_HOST_CENTER', '127.0.0.1'),
            'port' => env('DB_PORT_CENTER', '3306'),
            'database' => env('DB_DATABASE_CENTER', ''),
            'username' => env('DB_USERNAME_CENTER', ''),
            'password' => env('DB_PASSWORD_CENTER', ''),
            'unix_socket' => env('DB_SOCKET_CENTER', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'strict' => true,
            'engine' => null,
        ],

vim .env

DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=databasename
DB_USERNAME=name
DB_PASSWORD=password

DB_HOST_CENTER=127.0.0.1
DB_PORT_CENTER=3306
DB_DATABASE_CENTER=test
DB_USERNAME_CENTER=name
DB_PASSWORD_CENTER=password

测试连接
vim app/Http/Controllers/controller.php

use Illuminate\Http\Request;
use DB；

class Controller extends BaseController
{

    /**添加参数校验
     *测试get请求
     * @param $name
     */
    public function index(Request $request, $name)
    {
       $dataDafault = DB::select('select * from user', [1]);
        echo '使用默认数据库查询';
        var_dump($dataDafault);
        echo '使用mysql_center查询';
        $dataCenter = DB::connection('mysql_center')->select('select * from user', [1]);
        var_dump($dataCenter);
    }
}