(PHP 5 >= 5.4.0)
SessionHandler::read — Read session data
Reads the session data from the session storage, and returns the result back to PHP for internal processing. This method is called automatically by PHP when a session is started (either automatically or explicity with session_start() and is preceeded by an internal call to the SessionHandler::open().
If this class is extended by inheritiance, calling the parent
read method will invoke the wrapper for this method and therefor invoke the associated internal callback. This allows the method to be overidden and or intercepted and filtered (for example, decrypting
$data value returned by the parent
For more information on what this method is expected to do, please refer to the documentation at SessionHandlerInterface::read().
The session id to read data for.
Returns an encoded string of the read data. If nothing was read, it must return an empty string. Note this value is returned internally to PHP for processing.