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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.
A webform, web form or HTML form on a web page allows a user to enter data that is sent to a server for processing. Forms can resemble paper or database forms because web users fill out the forms using checkboxes, radio buttons, or text fields. For example, forms can be used to enter shipping or credit card data to order a product, or can be ...
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]
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.
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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 ...
Mustache (template system) Mustache is a web template system. It is described as a logic-less system because it lacks any explicit control flow statements, like if and else conditionals or for loops; however, both looping and conditional evaluation can be achieved using section tags processing lists and anonymous functions (lambdas).
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 ...