Web Technologies

• Define the content of web pages.

  HTML
• The PHP scripting language is used to create dynamic web pages.
• getElementByld() is one of many JavaScript HTML Methods that can be used to get a specific HTML element by its unique ID.
• JavaScript is an interpreted, high-level, weakly typed, prototype-based scripting language with first-class functions.
• World Wide Web


  The global information system that is logically linked together by a globally unique address space based on the Internet Protocol (IP) and other Internet protocols
• Dialing up connection internet

  Connecting to the internet through a dial-up modem
• Hypertext Transfer Protocol (HTTP)


  The foundation of data communication for the World Wide Web
• Hypertext Markup Language (HTML)


  The standard markup language for creating web pages and web applications
• URI: Uniform Resource Identifier

  A string of characters that unambiguously identifies a particular resource
• WorldWideWeb.app


  The first web page and editor/browser, and httpd as the first web server
• The early web community produced some revolutionary ideas such as decentralisation, non-discrimination, net neutrality, and bottom-up design
• Principles of the early web community

  • Decentralisation
  • Non-discrimination
  • Net Neutrality
  • Bottom-up design
  • Universality
• Open initiatives


  • Open Data
  • Open Government
  • Open Access
  • Free Culture
• The Request/Response Procedure


  The fundamental interaction model of the World Wide Web
• Dynamic web pages can be created using PHP, MySQL, JavaScript, CSS, and HTML5
• PHP requires a webserver
• The correct way to add a comment in PHP is /*..*/
• When using the POST method, variables are displayed in the URL:
• PHP allows you to send emails directly from a script, without having to use a mail server.
• In PHP you can use both single quotes ( ' ' ) and double quotes ( " " ) for strings
• $cars = array("Volvo","BMW","Toyota"); is an example to create an array in PHP
• $count++; is the correct way to add 1 to the $count variable.
• The die() and exit() functions do the exact same thing.
• All variables in PHP start with the $ symbol.
• In PHP, there are multiple ways to output text. The most common one is indeed the echo statement, but there are also other constructs such as print, printf, and functions like var_dump and print_r for debugging and displaying data.
• The operator is used to check if two values are equal and of the same data type is ==
• PHP server scripts are surrounded by delimiters, which is <?php ..?>
• $GLOBALS is the superglobal variable that holds information about headers, paths, and script locations.
• $_GET[]; is used to get information from a form that is submitted using the "get" method.
• function myFunction() is the correct way to create a function in PHP.