Check out example codes for "file_put_contents(/var/www/ failed to open stream: No such file or directory". It will help you in understanding the concepts better.

Code Example 1

To do this, run the following Artisan commands on your command line
	php artisan cache:clear
    php artisan config:cache
Then assign the permissions to the folder 
and Go to directory laravel/bootstrap/cache and delete config.php

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