Answers for "change existing column using migration laravel"

laravel migration add column to existing table

php artisan make:migration add_paid_to_users_table --table=users
  
public function up()
{
    Schema::table('users', function($table) {
        $table->integer('paid');
    });
}

public function down()
{
    Schema::table('users', function($table) {
        $table->dropColumn('paid');
    });
}

php artisan migrate

laravel migration add column after

Schema::table('users', function ($table) {
    $table->string('email')->after('id')->nullable();
});