PHP operator '===' is the only strict way to mix up the value '0' and
the value 'FALSE'.
The function saveData of the FileCache tests if the write of the cache
files was done with success and raise an Exception if not. The test was
done without the '===' operator, and if the data is 0 bytes long the
error message says there is a permission error, which is false.
A data 0 bytes long is another issue, either in the json_encode function
either in the Bridge, but not a permission issue.
Elements are now put into separate JSON containers. As such
assignment changed from : to = and as only one container
is present in each element, the final , is omitted.
JSON data is html encoded and requires decoding before decoding
via json_decode.
Previously the cache file name was only build upon bridge
parameters. If two bridges don't make use of any parameter
this would result into equal file names.
JSON format does not serialize object instances, which we don't
want anyways, and improves readability. The hashing algorithm
changed to md5 to prevent collisions with existing cache files
Previously BridgeAbstract needed to know which exact implementation
of CacheInterface was used (since we only got one right now its
not a problem). Initializing the cache in index.php instead allows
to change cache types more easily.
There is no need to check the absense of the parameters in
all functions. Instead 'getCacheName' is the only function
actually using the parameters and thus should check the
availability.
Previously the cache file name was build on the original request URI
which also included the parameters. This could result in different
file name for the same request (different format). Removing the format
from the request is already done in index.php and could lead to issues
in the future (if new parameters are introduced).
The function 'prepare' previously implemented in CacheAbstract
is specifically required for FileCache and thus belongs to FileCache.
Since this change removes all code from CacheAbstract, it can be
removed completely.
