如何在laravel中的database.php文件中动态附加连接

Question

我需要使用php代码在database.php文件中动态附加连接，这可能吗？

Answer 1

它对我有用当我创建一个新客户时，

public function setConnection($tenantName){
//GET Database Connection file path
$path = config_path('database.php');
//GET Database Connection file 
$arr = include $path;
// load the array from the file
$new_connection=[
'driver'    => 'mysql',
'host'      => env('DB_HOST'),
'database'  => $tenantName,
'username'  => env('DB_USERNAME'),
'password'  => env('DB_PASSWORD'),
'charset'   => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix'    => '',
'strict' => false
];
// modify the array
$arr['connections'][$tenantName]=$new_connection;
// write it back to the file
file_put_contents($path, "<?php  return " . var_export($arr, true) . ";");
}

Answer 2

可以有多个数据库连接，并显式地对其中一个执行查询：https://laravel.com/docs/8.x/database#using-多数据库连接

config/database.php必须返回一个数组，其中config('database.connections')包含一个带有表示不同数据库引擎的键的数组，但完全可以将mysql2和mysql3添加到该数组中。

例如：

<?php
use IlluminateSupportStr;
$customConnections = [];
for(var $i = 1; $i < 5; $i++) {
$customConnections['mysql'.$i] = [
'driver' => 'mysql',
'url' => env('DATABASE_URL'),
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '330'.$i),
'database' => env('DB_DATABASE', 'mysql'.$i),
'username' => env('DB_USERNAME', 'mysql'.$i),
'password' => env('DB_PASSWORD', ''),
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'prefix_indexes' => true,
'strict' => true,
'engine' => null,
'options' => extension_loaded('pdo_mysql') ? array_filter([
PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
]) : [],
];
}
return [
/*
|--------------------------------------------------------------------------
| Default Database Connection Name
|--------------------------------------------------------------------------
|
| Here you may specify which of the database connections below you wish
| to use as your default connection for all database work. Of course
| you may use many connections at once using the Database library.
|
*/
'default' => env('DB_CONNECTION', 'mysql'),
/*
|--------------------------------------------------------------------------
| Database Connections
|--------------------------------------------------------------------------
|
| Here are each of the database connections setup for your application.
| Of course, examples of configuring each database platform that is
| supported by Laravel is shown below to make development simple.
|
|
| All database work in Laravel is done through the PHP PDO facilities
| so make sure you have the driver for your particular database of
| choice installed on your machine before you begin development.
|
*/
'connections' => [
...$customConnections,
'sqlite' => [
'driver' => 'sqlite',
'url' => env('DATABASE_URL'),
'database' => env('DB_DATABASE', database_path('database.sqlite')),
'prefix' => '',
'foreign_key_constraints' => env('DB_FOREIGN_KEYS', true),
],
'mongodb' => [
'driver' => 'mongodb',
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', 27017),
'database' => env('DB_DATABASE', 'homestead'),
'username' => env('DB_USERNAME', 'homestead'),
'password' => env('DB_PASSWORD', 'secret'),
'options' => [
// here you can pass more settings to the Mongo Driver Manager
// see https://www.php.net/manual/en/mongodb-driver-manager.construct.php under "Uri Options" for a list of complete parameters that you can use
'database' => env('DB_AUTHENTICATION_DATABASE', 'admin'), // required with Mongo 3+
],
],
'mysql' => [
'driver' => 'mysql',
'url' => env('DATABASE_URL'),
'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' => '',
'prefix_indexes' => true,
'strict' => true,
'engine' => null,
'options' => extension_loaded('pdo_mysql') ? array_filter([
PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
]) : [],
],
'pgsql' => [
'driver' => 'pgsql',
'url' => env('DATABASE_URL'),
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '5432'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'forge'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'prefix' => '',
'prefix_indexes' => true,
'schema' => 'public',
'sslmode' => 'prefer',
],
'sqlsrv' => [
'driver' => 'sqlsrv',
'url' => env('DATABASE_URL'),
'host' => env('DB_HOST', 'localhost'),
'port' => env('DB_PORT', '1433'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'forge'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'prefix' => '',
'prefix_indexes' => true,
],
],
// ...
];