Migrating from PHP 5.0.x to PHP 5.1.x

Table of Contents

See also the migration guides for PHP versions 5.0.x and 5.2.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.

    

 

 
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