Difference between PHP 4 and PHP 5

Difference between PHP 4 and PHP 5

Difference between PHP 4 and PHP 5. While PHP 5 was purposely designed to be as compatible as possible with previous versions, there are some significant changes. Some of these changes include:

  • A new OOP model based on the Zend Engine 2.0
  • A new extension for improved MySQL support
  • Built-in native support for SQLite
  • A new error reporting constant, E_STRICT, for run-time code suggestions
  • A host of new functions to simplify code authoring (and reduce the need to write your own functions for many common procedures)

There are also some helpful links

http://www.php.net/manual/en/migration5.php

http://www.php.net/manual/en/faq.migration5.php

http://www.php.net/manual/en/migration5.incompatible.php

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