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What Is a Sub-element in HTML?
What Is a Sub-element in HTML? A sub-element is an HTML element that is included inside the content of another HTML element. The inner element is called the sub-element or child element. The outer element is called the parent element. Together they are called nested elements. Note that which element...
2024-02-28, 1239🔥, 0💬

Two HTML Elements Overlapping Each Other
Can Two HTML Elements Partially Overlap Each Other? No, two elements can not partially overlap each other. One element must be completely enclosed inside the other element. See the following two examples: <!-- Valid: "em" is enclosed inside "strong" --> <p>There was once ...
2024-02-28, 1126🔥, 0💬

What Is CDATA in HTML Documents?
What Is CDATA in HTML documents? CDATA stands for Character DATA, which is used to define a section of data that should not go through the XHTML entity translation (parsing) process. In other words, 3 special characters: "<", ">", and "&" can be directly used in CDATA. They wil...
2024-02-28, 1124🔥, 0💬

Required Sub-elements in HTML
What Is a Required Sub-element? A required sub-element is a sub-element that you must included in the parent element. Most sub-elements are optional. But there are some sub-elements that are required by their parent elements. Here are two good examples: <!-- Valid: "head" requires "title" --&...
2024-02-28, 1073🔥, 0💬

Sequence of Sub-elements in HTML
What Is the Sequence of Sub-elements? The sequence of sub-elements is the order of how each sub-element is placed inside the parent element. For most parent elements, their sub-elements can be placed in any order. But some parent elements require you to follow a predefined sequence. For example, ele...
2024-02-28, 1048🔥, 0💬

Reformatting a Paragraph of Text in PHP
How To Reformat a Paragraph of Text? You can wordwrap() reformat a paragraph of text by wrapping lines with a fixed length. Here is a PHP script on how to use wordwrap(): <?php $string = "TRADING ON MARGIN POSES ADDITIONAL RISKS AND IS NOT SUITABLE FOR ALL INVESTORS. A COMPLETE LIST OF THE RI...
2024-02-27, 1611🔥, 5💬

White Space Characters Handling Rules in HTML
How Exactly White Space Characters Are Ignored? White space characters will be processed (ignored) based where they are located: White space characters will be ignored between block elements. White space characters will be preserved in element "pre". White space characters will be preserved in CDATA...
2024-02-21, 1230🔥, 2💬

HTML Document Structure and Head Level Tags
Where to find tutorials of introduction to HTML Document Structure and Head Level Tags? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team in introduction to HTML Document Structure and Head Level Tags. Clear answers are provided with tutorial exerci...
2024-02-18, 1297🔥, 0💬

White Space Characters in HTML
What Is a White Space Character? A white space character is a character that leaves nothing on your screen. There are 4 known white space characters: " " - The space character. "\t" - The tab character. "\n" - The new line character. "\r" - The carriage return character. White space characters are g...
2024-02-18, 1128🔥, 0💬

HTML 'html' Tag/Element
What Is the HTML "html" Tag/Element? The "html" element is the first element you need to learn. The "html" element is used to enclose the entire HTML document. Here are some rules about the "html" element: The html element is the only top level element. The html element is also called the root eleme...
2024-02-18, 1120🔥, 0💬

Getting Extra White Spaces in HTML
How To Get an Extra White Space? As you know that white space characters will be ignored in elements like "p". So how to get some extra white space to show up in your text paragraphs? On easy solution is to use XHTML entity: " ", which stands for "non-breaking space". Here is an example...
2024-02-18, 989🔥, 0💬

Relation between HTML and CSS?
What Is the relation between HTML and CSS? CSS (Cascading Style Sheets) is a technical specification that allows HTML document authors to attach formatting style sheets to HTML documents. When HTML documents are viewed as Web pages through Web browsers, the attached style sheets will alter the defau...
2024-02-09, 1316🔥, 0💬

Relation between HTML and SGML
What Is the relation between HTML and SGML? SGML (Standard Generalized Markup Language) is a metalanguage in which one can define markup languages, like HTML, for documents. SGML is a descendant of IBM's Generalized Markup Language (GML), developed in the 1960s by Charles Goldfarb, Edward Mosher and...
2024-02-09, 1153🔥, 0💬

Relation between HTML and DTD
What Is the relation between HTML and DTD? DTD (Document Type Definition) is a language based on XML to you to define a specific type of XML documents. Since the XHTML serialization of an HTML document is a specific type of XML documents, you can use DTD to define the structure of XHTML. In fact, XH...
2024-02-09, 1127🔥, 0💬

Relation between HTML and URL
What Is the relation between HTML and URL? URL (Uniform Resource Locator) is a compact string representation of the location for a Web document or other resource that is available on the Internet. The URL of an HTML document is usually the document file name prefixed with the domain name of your Web...
2024-02-09, 1082🔥, 0💬

Relation between HTML and URI?
What is the relation between HTML and URI? URI (Uniform Resource Identifier) is a superset of URL. URI provides a simple and extensible means for identifying a resource in a more generic way. For example, the following strings are all valid URIs: ftp://ftp.is.co.za/rfc/rfc1808 .txthttp://www.ietf.or...
2024-02-09, 1082🔥, 0💬

Relation between HTML and HTTP
What Is the relation between HTML and HTTP? HTTP (HyperText Transfer Protocol) is an Internet communication protocol, that allows a viewer's computer talking to a publisher's computer to fetch HTML documents and other resources. The viewer's computer issues a HTTP request message to the publisher co...
2024-02-09, 2007🔥, 2💬

RSS Online Validator at w3.org
How to use the RSS Online Validator at w3.org? You can follow this tutorial to learn how to use the RSS Online Validator at w3.org. 1. Go to Feed Validation Service at w3.org . 2. Enter the following RSS feed in the input box: http://dev.fyicenter.com/rss_x ml.php3. Click the "Check" button. You see...
2024-02-05, 3774🔥, 2💬

Relation between HTML and XML
What Is the relation between HTML and XML? XML (Extensible Markup Language) is a generic markup language to organize generic information into a structured document with embedded tags. HTML a specific markup language to organize Web information into a structured document. When an HTML document is ser...
2024-01-31, 1203🔥, 0💬

XHTML Document Example
What Does an XHTML Document Look Like? An XHTML document is a normal text file with predefined tags mixed with the text contents of the document. Tags are enclosed in pairs of angle brackets: "<" and ">". Below is how a simple XHTML document looks like if you open it in a text editor: ...
2024-01-31, 1131🔥, 0💬

Relation between HTML and the Web
What Is the relation between HTML and the Web? The Web is a publisher technology based on the Internet to allow publishers to publish hyper linked documents to be viewed by Internet users. HTML is the language used to construct those hyper linked documents. So HTML is the primary language that suppo...
2024-01-31, 1106🔥, 0💬

Relation between HTML and XHTML
What Is the relation between XHTML and HTML? Technically speaking, the HTML standard introduces one abstract language and three concrete syntaxes to represent an HTML document in different formats: 1. HTML language - An abstract language that describes a Web document in constructed. It is used to ge...
2024-01-31, 1002🔥, 0💬

Google OpenID Connect Integration
Where to find tutorials on Google OpenID Connect Integration? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team Google OpenID Connect Integration. Requirements for Google OpenID Connect Integration Application Registration for Google OpenID Authenti...
2024-01-23, 1280🔥, 1💬

HTML 'head' Tag/Element
What Is the HTML "head" Tag/Element? The "head" element is the second element you need to learn. The "head" element is used to provide information about the XHTML document. The "head" element should not be used to contain any contents of the XHTML document. Here are some rules about the "head" tag/e...
2024-01-19, 1064🔥, 0💬

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