Since changes are too huge to show here, please refer:
http://pear.php.net/package/DB/download/All
One note from 1.7.8's changes:
This release of DB fixes numerous bugs compared to 1.7.7. Users of previous
versions are encouraged to upgrade in due course.
Users of the pgsql driver should note that this release fixes a security issue
reported by Yasuo Ohgaki; the security issue is described in more detail by
CVE-2006-2313 and CVE-2006-2314. PostgreSQL users should upgrade to both DB
1.7.8 AND at least PostgreSQL 7.3.15, 7.4.13, 8.0.8, 8.1.4 or 8.2.0 as soon as
possible if they are using SJIS, BIG5, GBK, GB18030 or UHC as a client
encoding.
longlong
DB is a database abstraction layer providing:
* an OO-style query API
* portability features that make programs written for one DBMS work with i
other DBMS's
* a DSN (data source name) format for specifying database servers
* prepare/execute (bind) emulation for databases that don't support it natively
* a result object for each query response
* portable error codes
* sequence emulation
* sequential and non-sequential row fetching as well as bulk fetching
* formats fetched rows as associative arrays, ordered arrays or objects
* row limit support
* transactions support
* table information interface
* DocBook and phpDocumentor API documentation
