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P

PHP

PHP is an free, open-source server-side scripting language. PHP code can be embedded in HTML. PHP files usually have extensions like .php or .php3. PHP language style is similar to C and Java. Here is the PHP group web site. Other popular server-side scripting languages are ASP, Perl, ColdFusion, TCL, Python, and JSP.

Port

A socket on the computer or other network device used to connect it to the network.

Protocol

A set of rules by following which two parties can communicate. The TCP/IP protocol suite is the basis of todays Internet.