ConfigCacheCommand.php

<?php

//Illuminate\Foundation\Console\ConfigCacheCommand

public function handle()
{
    $this->call('config:clear'); // clear your config cached if it exists.

    $config = $this->getFreshConfiguration(); // get a new config

    $configPath = $this->laravel->getCachedConfigPath(); // get cache file path

    $this->files->put(
        $configPath, '<?php return '.var_export($config, true).';'.PHP_EOL
    ); // put the cached file.

    try {
        require $configPath; // if it generated successful, require the file.
    } catch (Throwable $e) { // php7 error exception handle.
        $this->files->delete($configPath); // delete failed file.

			// throwing a logic exception to tell you, oh, something wents wrong.
        throw new LogicException('Your configuration files are not serializable.', 0, $e);
    }

		// otherwise it's successful.
    $this->info('Configuration cached successfully!');
}