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  2. hreflang - Wikipedia

    en.wikipedia.org/wiki/Hreflang

    Many websites are targeted at audience with different languages and localized for different countries. This can cause a lot of duplicate content or near duplicate content, as well as targeting issues with users from search engines.

  3. PHP - Wikipedia

    en.wikipedia.org/wiki/PHP

    As of 21 January 2025 (two months after PHP 8.4's release), PHP is used as the server-side programming language on 75.0% of websites where the language could be determined; PHP 7 is the most used version of the language with 47.1% of websites using PHP being on that version, while 40.6% use PHP 8, 12.2% use PHP 5 and 0.1% use PHP 4.

  4. Hyperlink - Wikipedia

    en.wikipedia.org/wiki/Hyperlink

    An inline link displays remote content without the need for embedding the content. The remote content may be accessed with or without the user following the link. An inline link may display a modified version of the content; for instance, instead of an image, a thumbnail, low resolution preview, cropped section, or magnified section may be shown.

  5. Canonical link element - Wikipedia

    en.wikipedia.org/wiki/Canonical_link_element

    There are multiple factors Google evaluates when determining the canonical version of a page, including: The canonical tag you set up: This is the most direct way to suggest the preferred URL to search engines.

  6. PHP syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/PHP_syntax_and_semantics

    PHP has hundreds of base functions and thousands more from extensions. Prior to PHP version 5.3.0, functions are not first-class functions and can only be referenced by their name, whereas PHP 5.3.0 introduces closures. [35] User-defined functions can be created at any time and without being prototyped. [35]

  7. mailto - Wikipedia

    en.wikipedia.org/wiki/Mailto

    mailto is a Uniform Resource Identifier (URI) scheme for email addresses.It is used to produce hyperlinks on websites that allow users to send an email to a specific address directly from an HTML document, without having to copy it and entering it into an email client.

  8. Query string - Wikipedia

    en.wikipedia.org/wiki/Query_string

    A query string is a part of a uniform resource locator that assigns values to specified parameters.A query string commonly includes fields added to a base URL by a Web browser or other client application, for example as part of an HTML document, choosing the appearance of a page, or jumping to positions in multimedia content.

  9. BBCode - Wikipedia

    en.wikipedia.org/wiki/BBCode

    BBCode ("Bulletin Board Code") is a lightweight markup language used to format messages in many Internet forum software. It was first introduced in 1998. [citation needed] The available "tags" of BBCode are usually indicated by square brackets ([and ]) surrounding a keyword, and are parsed before being translated into HTML.