Php/docs/migration51.changes

• PHP Manual
• Migrating from PHP 5.0.x to PHP 5.1.x
• Key PHP 5.1.x features

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.