differences between php 4 and php5
PHP5 has more advanced class architecture than PHP4. Its has method
access properties like protected, public, private. The constructor,
destructor methods are changed in php5. Ie writing a constructor
function has been changed also there is no destructor in php4 version.
In PHP 5 version, there is , more advanced function added.
Exception were introduced in the PHP5 version.
In PHP5 new extensions like simpleXML, DOM were introduced.
