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The purpose of the delimiting tags is to separate PHP code from non-PHP data (mainly HTML). Although rare in practice, PHP will execute code embedded in any file passed to its interpreter, including binary files such as PDF or JPEG files, or in server log files.
The phrase "academic search engines" is the anchor text in the hyperlink that the cursor is pointing to. The anchor text, link label, or link text is the visible, clickable text in an HTML hyperlink. The term "anchor" was used in older versions of the HTML specification [1] for what is currently referred to as the "a element", or <a>. [2]
A link relation is a descriptive attribute attached to a hyperlink in order to define the type of the link, or the relationship between the source and destination resources. The attribute can be used by automated systems, or can be presented to a user in a different way.
Example 1: Vary: * Example 2: Vary: Accept-Language; Permanent RFC 9110: Via: Informs the client of proxies through which the response was sent. Via: 1.0 fred, 1.1 example.com (Apache/1.1) Permanent RFC 9110: Warning: A general warning about possible problems with the entity body. Warning: 199 Miscellaneous warning: Obsolete [21] RFC 7234, 9111 ...
To put an article in a category, place a link like [[Category: Example]] into the article. As with interlanguage links, placing these links at the end of the article is recommended. To link to a category page without putting the article into the category, use a colon prefix (":Category") in the link.
A piped link is an internal link or interwiki link where the link target and link label are both specified. This is needed in the case that they are not equal, while also the link label is not equal to the link target with the last word extended:
A more complex example: the expression a [/ html / @lang = 'en'][@href = 'help.php'][1]/ @target selects the value of the target attribute of the first a element among the children of the context node that has its href attribute set to help.php, provided the document's html top-level element also has a lang attribute set to en. The reference to ...
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.