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PHP (PHP: Hypertext Preprocessor)

PHP (PHP: Hypertext Preprocessor) What is PHP? PHP stands for PHP: Hypertext Preprocessor. It is a web development language written by and for web developers. The product was originally named Personal Home Page Tools. PHP is an open source, server side, HTML-embedded web scripting language usually used to create web applications in combinations with a web server, such as Apache. It enables the user to embed code fragments in normal HTML-page. It also makes the connection of a web page to server-side databases. It can also be used to create command-line scripts akin to Perl or shell scripts.   HTML-embeddedness PHP can be easily embedded within HTML-page. In other words, PHP pages are ordinary HTML pages that escape into PHP mode only when necessary. PHP codes are embedded with the help of canonical php tags.   <? php   ?>  Following is an example- <html> <head> <title> Greeting </title> </head> ...
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CSS(cont.)

Type Selectors ·        Universal Selector CSS has a special selector (*) which means it matches every   element in the document. This selector is useful in when name of elements are unknown while developing the style sheet. For example:- * {color: green; } ·        Descendent selector This selector is also known as contextual selector. In style                   sheet it is applied to a particular element only when it lies inside a particular element. It provides a better way to apply style to very particular elements. This selector is consisting of one or more selector separated by white spaces. ·        Child selector This is similar to the descendent selector. It selects the element which is just immediate children of the specific element. It is denoted by the >. It can ...
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Web Server

Web Server A Web Server can be defined as software that enables computer to deliver web pages written in html to client machine. Capabilities provided by a web server are: 1.        Security services 2.        FTP(File Transfer Protocol) 3.        Data capturing(Logs are maintained in web server) 1 Web server plays two roles static and dynamic. 1.        Static : A static web page is one that has been written once, like a word processing document, and then saved onto the web server. Static pages are created using tools like HTML, JavaScript, CSS and images.  2.         Dynamic : A dynamic web page is created on the fly. It doesn’t actually exist on the web server until a web browser requests it. When a request is made, web server runs whatever program will create the web page. That program creates the page dynam...
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