In general, there are 256 of programming languages exist in the programming world. Programming languages are classified in many ways. The most commonly used programming languages are Hypertext Markup Language (HTML), Java and Php.
The third most commonly used programming language that used in developing a program is Hypertext Preprocessor (PHP). PHP is suitable used in web development and also can be embedded into HTML. Besides, PHP scripts are usually used in three main areas which are server-side scripting, command line scripting and writing desktop applications. Usually, PHP used to read data and information from databases, and to add or update the databases content. A single PHP template can be written to retrieve and display the databases records. PHP is a language developed by Rasmas Lerdorf which originally an abbreviation of ‘Personal Home Page (tools)’ (Motive Glossary, 2004). PHP is a recursive programming where the command can be used over and over again to gain data. Before this, this language has been said that has been widely used in server-side scripting (Motive Glossary, 2004), which is can do anything that are related to any other computer graphic image (CGI) program likes collect data, generate dynamic page content or send and receive cookies. This language can be used in any operating systems, including Linux, Microsoft Windows, Mac OS X, and RISC OS. Each of the programming language has its function and same goes with PHP language which are can output images, form a server-side cache for content and easily output any text such as XHTML and XML file. Example code of PHP language that used in developing program can be seen in Table 1. PHP code can be inserted into the HTML webpage because it is an HTML-embedded web scripting language. When PHP page is opened, the PHP code is read from the located page by the server. The results from the PHP functions on the page usually read as HTML codes that can be read by the browser. This is because PHP codes do not have its own interface and were transformed into HTML codes first before the page is loaded and users cannot view the PHP codes on a page without a user interface from the HTML. The reason is to make the PHP page secure to access databases and other secure information.
In conclusion, Hypertext Markup Language, Java and Hypertext Preprocessor are considered as the most commonly used programming language in programming world because it is used in creating websites that are essential to our daily lives nowadays.
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