Features at PHP 4PHP 4.0 is not the last version issued of PHP programming, but this version still using by many website programmers and the features are:
1. Increasing handled at used resource Main lack from PHP 3.0 is scalability. Programmers still thought PHP 3.0 can not use at large scale applications. This matter make PHP developer work hard to increase resource handling ability, so PHP can run at large scale applications.
2. Object Oriented program support This features playing important role for user so it can work with object oriented program language.
3. Session handling support Handle at HTTP session actually exist at PHP 3.0 version. But, still using third party support, it is PHPLIB (http://phplib.sourceforge.net). So, at this 4 version session can handling direct by PHP already.
This features offering interaction from web site. Example most used is at login and logout process.
4. Encryption MCrypt (http://mcrypt.sourceforge.net) combined already in it original distribution. This feature offered algorithm encryption among is, MD5, SHA1, and tripleDES.
5. ISAPI support This feature connecting web server IIS (from Microsoft) and PHP and repute as ISAPI module.
6. COM/DCOM support This one, just think it as bonus for windows user. This feature enabling PHP to access COM objects and add interoperability with application that run in windows.
Features at PHP 5PHP 5 is continued from evolution walk at PHP. Even at PHP 4 there are many library added, PHP 5 offering increasing in functionality and added some features, among:
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