Laravel-fopen: failed to open stream: Permission denied

PHP Snippet 1:

; Maximum allowed size for uploaded files.
upload_max_filesize = 40M

; Must be greater than or equal to upload_max_filesize
post_max_size = 40M

PHP Snippet 2:

; Maximum allowed size for uploaded files.
upload_max_filesize = 2M

PHP Snippet 3:

cd tmp/sessionlocks/

PHP Snippet 4:

chmod -R 777 .