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  2. W3C Markup Validation Service - Wikipedia

    en.wikipedia.org/wiki/W3C_Markup_Validation_Service

    W3C Markup Validation Service. The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.

  3. Document Object Model - Wikipedia

    en.wikipedia.org/wiki/Document_Object_Model

    The Document Object Model ( DOM) is a cross-platform and language-independent interface that treats an HTML or XML document as a tree structure wherein each node is an object representing a part of the document. The DOM represents a document with a logical tree. Each branch of the tree ends in a node, and each node contains objects.

  4. PHP - Wikipedia

    en.wikipedia.org/wiki/PHP

    PHP treats newlines as whitespace in the manner of a free-form language, and statements are terminated by a semicolon. [218] PHP has three types of comment syntax: /* */ marks block and inline comments; // or # are used for one-line comments. [219] The echo statement is one of several facilities PHP provides to output text. [citation needed]

  5. Meta element - Wikipedia

    en.wikipedia.org/wiki/Meta_element

    v. t. e. Meta elements are tags used in HTML and XHTML documents to provide structured metadata about a Web page. They are part of a web page's head section. Multiple Meta elements with different attributes can be used on the same page. Meta elements can be used to specify page description, keywords and any other metadata not provided through ...

  6. Use AOL Certified Mail to confirm legitimate AOL emails

    help.aol.com/articles/what-is-aol-certified-mail

    When you open the email, you'll also see the Certified Mail banner above the message details. When you get a message that seems to be from AOL, but it doesn't have those 2 indicators, and it isn't alternatively marked as AOL Official Mail, it might be a fake email. Make sure you mark it as spam and don't click on any links in the email.

  7. Web beacon - Wikipedia

    en.wikipedia.org/wiki/Web_beacon

    Web beacons embedded in emails have greater privacy implications than beacons embedded in web pages. Through the use of an embedded beacon, the sender of an email – or even a third party – can record the same sort of information as an advertiser on a website, namely the time that the email was read, the IP address of the computer that was used to read the email (or the IP address of the ...

  8. Web development - Wikipedia

    en.wikipedia.org/wiki/Web_development

    Web development is the work involved in developing a website for the Internet ( World Wide Web) or an intranet (a private network). [ 1] Web development can range from developing a simple single static page of plain text to complex web applications, electronic businesses, and social network services. A more comprehensive list of tasks to which ...

  9. Dynamic HTML - Wikipedia

    en.wikipedia.org/wiki/Dynamic_HTML

    Dynamic HTML, or DHTML, is a term which was used by some browser vendors to describe the combination of HTML, style sheets and client-side scripts ( JavaScript, VBScript, or any other supported scripts) that enabled the creation of interactive and animated documents. [ 1][ 2] The application of DHTML was introduced by Microsoft with the release ...

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