Migrating from PHP 5.0.x to PHP 5.1.x

Key PHP 5.1.x features

Some of the key features of PHP 5.1.x include:

• A complete rewrite of date handling code, with improved timezone support.

• Significant performance improvements compared to PHP 5.0.X.

• PDO extension is now enabled by default.

• Over 30 new functions in various extensions and built-in functionality.

• Over 400 various bug fixes.