Laravel sync offline database to online - php

Question

I want to sync my local database to online database when i click on a button in blade page. I looked online for the solution but did not found anything that worked for me.
I have updated my database .php file I have added local and server database connection credentials.
I have found a solution but that is not completed.
solution that i found
database.php
'local' => [
'driver' => 'mysql',
'url' => env('DATABASE_URL'),
'host' => env('LOCAL_DB_HOST', '127.0.0.1'),
'port' => env('LOCAL_DB_PORT', '3306'),
'database' => env('LOCAL_DB_DATABASE', 'forge'),
'username' => env('LOCAL_DB_USERNAME', 'forge'),
'password' => env('LOCAL_DB_PASSWORD', ''),
'unix_socket' => env('LOCAL_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'),
]) : [],
],
'server' => [
'driver' => 'mysql',
'url' => env('DATABASE_URL'),
'host' => env('SERVER_DB_HOST', '127.0.0.1'),
'port' => env('SERVER_DB_PORT', '3306'),
'database' => env('SERVER_DB_DATABASE', 'forge'),
'username' => env('SERVER_DB_USERNAME', 'forge'),
'password' => env('SERVER_DB_PASSWORD', ''),
'unix_socket' => env('SERVER_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'),
]) : [],
],
controller code
// Connect to local database
return $local_database = DB::connection('local-db')->table('table_name');
// Get table data from production
foreach ($local_database->table('table_name')->get() as $data) {
// Save data to staging database - default db connection
DB::table('table_name')->insert((array) $data);
// This query can do only one time for multiple time we have to do
DB::table('table_name')->insertOrUpdate((array) $data);
// This query also update column only, if you do some changes in
//previous data it will not sync for that i dont know this query is
//correct or not but it worked.
DB::table('table_name')->delete((array) $data);
DB::table('table_name')->insertOrIgnore((array) $data);
}
env
SERVER_DB_CONNECTION=server
SERVER_DB_HOST=127.0.0.1
SERVER_DB_PORT=3306
SERVER_DB_DATABASE=sync_db
SERVER_DB_USERNAME=root
SERVER_DB_PASSWORD=
LOCAL_DB_CONNECTION=local
LOCAL_DB_HOST=127.0.0.1
LOCAL_DB_PORT=3306
LOCAL_DB_DATABASE=sync_db
LOCAL_DB_USERNAME=root
LOCAL_DB_PASSWORD=