Application server can be define as sever program which is a part of n-tier application in a distributed network. It contains the business logic for an application program.
In simple term application sever program act as an interpretor between Web server and database system which contain all the data.Whenever, web server encounter a web page with for example PHP tag in it, it pass it on to the PHP client which decode the tag and deliver the required information to web-server which in turn send that to web browser.
Various application servers
- PHP severs
- various PHP servers are:-
- PHPlens
- PHPappl
- Zend
- Eclipse PHP Development tool kit
- IBM PHP integration kit for Websphere server(Websphere is java appliction server but with PHP integration kit it can also function as PHP application server along with J2ee support.
- J2EE Application server
-various J2EE application servers are:-
- Apache
- Tomcat
- Websphere
- Orion
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