Laravel 5.3 MySQL Upsert Trait

MySQLUpsert.php

<?php

namespace App\Traits;

use Illuminate\Support\Facades\DB;

trait MySQLUpsert
{
    /**
     * Single call to insert/update based on any duplicate key (primary, unique, etc.)
     *
     * User::upsert(['email' => 'johndoe@gmail.com', 'name' => 'Johnny', 'phone' => '818-555-1234'], ['name', 'phone']);
     *
     * This will create the data with the initial values, if there is a duplicate, 
     * it will override the keys provided in the second optional array.
     * 
     * @param array $array
     * @param array $override (optional)
     * @return mixed
     */
    public static function upsert(array $array, $override = []) {
        $class = get_called_class();
        $object = new $class();
        $table = $object->getTable();
        $fillable = $object->getFillable();

        $upsert_values = [];

        $key_values = collect(array_keys($array))->reduce(function($previous, $key) use(&$array, $override, $fillable, &$upsert_values) {
            if(!in_array($key, $fillable)) {
                unset($array[$key]);
                return $previous;
            }

            $previous['set'][] = '`' . $key . '` = ?';

            if(in_array($key, $override)) {
                $previous['upsert'][] = '`' . $key . '` = ?';
                $upsert_values[] = $array[$key];
            } else {
                $previous['upsert'][] = '`' . $key . '` = VALUES(`' . $key . '`)';
            }

            return $previous;
        }, ['set' =>[],'upsert' => []]);

        $values = array_values($array);

        DB::insert("INSERT INTO `$table` SET " . implode(',', $key_values['set']) . " ON DUPLICATE KEY UPDATE " . implode(',', $key_values['upsert']),
            array_merge($values, $upsert_values)
        );

        foreach($array as $key => $value) {
            $object->$key = $value;
        }

        return $object;
    }
}