W3Schools is a freemium educational website for learning coding online. [1][2] Initially released in 1998, it derives its name from the World Wide Web but is not affiliated with the W3 Consortium. …

PHP also supports a C-like sprintf function. Code can be modularized into functions defined with keyword function. PHP supports an optional object oriented coding style, with classes denoted by the …

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[14] PHP code is usually processed on a web server by a PHP interpreter implemented as a module, a daemon or a Common Gateway Interface (CGI) executable. On a web server, the result of the …

The World Wide Web Consortium (W3C), former maintainer of the HTML and current maintainer of the CSS standards, has encouraged the use of CSS over explicit presentational HTML since 1997. [3] A …

JavaScript (JS) [a] is a programming language and core technology of the Web, alongside HTML and CSS. It was created by Brendan Eich in 1995. [6] As of 2025, the overwhelming majority of websites …

Code injection is the malicious injection or introduction of code into an application. Some web servers have a guestbook script, which accepts small messages from users and typically receives messages …

In data sanitization, HTML sanitization is the process of examining an HTML document and producing a new HTML document that preserves only whatever tags and attributes are designated "safe" and …

In the context of an HTTP transaction, basic access authentication is a method for an HTTP user agent (e.g. a web browser) to provide a user name and password when making a request. In basic HTTP …

Web developer A web developer is a programmer who develops World Wide Web applications using a client–server model. The applications typically use HTML, CSS, and JavaScript in the client, and any …