- converted single-line if() block to multi-line and with curly braces
- "imported" SPL classes to have unified code style
- always initialize your variables ... :-/
- added some empty lines/spaces for better readability
Signed-off-by: Roland Häder <roland@mxchange.org>
- add backend related columns in photo table
- add system resource storage class
- add code to load image data from backend class
- return "nosign" image as photo meta with SystemResource backend