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XHTML 'meta' Elements Not Closed
What Happens If an XHTML "meta" Element Is Not Closed? Meta tags, link tags and base tags must be closed in XHTML documents. If you forget to close them like the HTML format, you will get validation errors. Try the following tutorial sample XHTML document on http://validator.w3.org/ to see what type...
2017-06-28, 512👍, 0💬

RSS 2.0 XML Schema at codeplex.com
Where Can I get a copy of the RSS XML Schema? RSS XML Schema is an XML Schema that defines how an RSS XML document should be generated. If you are interested to know how to use an RSS XML Schema to generate RSS XML documents in C# language, you can look at the source code of "RSS 2.0 Schema" project...
2017-11-05, 510👍, 0💬

"MyLibApp.cs" - Call VC# Class from Library
How to call a function from a VC# class provided in a library? If you want to call a function from a VC# class provided in a library, you can follow this tutorial: 1. Reference the shared function with the class name prefix: MyLib.PrintHello(); 2. See the following full source code example, MyLibApp...
2017-08-06, 507👍, 0💬

JSON Schema Validation for JSON String Values
What validation keywords I can use in JSON Schema to specifically validate JSON String values? The current JSON Schema specification supports the following validation keywords to specifically validate JSON Strings values. They are not applied if the JSON instance is not a JSON String. "maxLength" - ...
2017-09-01, 506👍, 0💬

What Is a URL
What Is a URL? A URL (Uniform Resource Locator) is a reference name representing a location of a Web document or other resource that is available on the Internet. Here are some examples of URLs: "http://www.w3.org/" "http://dev.fyicenter.com/faq/ xhtml/""http://www.google.com/search? hl=en&amp;q=...
2017-07-15, 505👍, 0💬

JSON to XML Conversion at freeformatter.com
How to use the JSON to XML Conversion Tool at freeformatter.com? If you want to try the JSON to XML Conversion Tool at freeformatter.com, you can follow this tutorial: 1. Go to the JSON to XML Conversion Tool page at freeformatter.com. 2. Enter the following JSON value in the text area: ["Hello", 3....
2018-03-18, 504👍, 0💬

HTML Forms and Input Fields
Where to find tutorials of introduction to HTML Forms and Input Fields? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team in introduction to HTML Forms and Input Fields. Clear answers are provided with tutorial exercises on forms and input fields: f...
2017-04-22, 503👍, 0💬

HTML 'hr' Tags/Elements
What Are "hr" Tags/Elements? A "hr" element is a block level element that can be used directly as a sub-element in the body element. You can use "hr" elements to specify horizontal rulers. Here are basic rules about "hr" elements: "hr" elements can only have empty contents. "hr" elements are block e...
2017-08-03, 502👍, 0💬

Default Protocol and Port Number of a URL
What Happens If Protocol or Port Number Is Missing in a URL? From a syntax point of view, all URL parts are optional. If some parts are not included in a URL, the browser and the hosting computer will provide default values. Here are some rules about the protocol name, host name, and port number: 1....
2017-07-07, 502👍, 0💬

Getting Minimum/Maximum Value of an Array in PHP
How To Get the Minimum or Maximum Value of an Array in PHP? If you want to get the minimum or maximum value of an array, you can use the min() or max() function. Here is a PHP script on how to use min() and max(): &lt;?php $array = array(5, 7, 6, 2, 1, 3, 4, 2); print("Minimum number: ".min($arr...
2016-12-28, 501👍, 0💬

HTML 'script' Tag/Element as Inline Element
What Is an HTML "script" Tag/Element? A "script" element is both an inline element and a block element that you can use to specify a script code to be executed by browsers. Here are basic rules about "script" elements: "script" elements are inline elements. "script" elements are also block elements....
2017-07-21, 500👍, 0💬

'frame' - Controlling HTML Table Borders
How To Turn On Some Parts of Table Outer Borders? If you don't want to turn all 4 edges of outer borders in a table, you need to use the "frame" attribute, which offer the following options: &lt;table border="1" frame="border"&gt; - Turns on all 4 edges. &lt;table border="1" frame="box"&...
2017-05-13, 500👍, 0💬

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 ...
2017-11-05, 499👍, 0💬

HTML Table Cell 'td' Tag/Element
What Is a "td" Tag/Element? A "td" element is a special element that can only be used as a sub-element of a "tr" element. A "td" element defines a column in a row. Here are basic rules about "td" elements: "td" elements are special elements only valid inside "tr" elements. "td" elements can have tex...
2017-05-20, 499👍, 0💬

Understanding PHP Arrays and Their Basic Operations
Where to find tutorials in Understanding PHP Arrays and Their Basic Operations? A collection of tutorials to answer many frequently asked questions on basic understanding of PHP arrays. Clear answers are provided with tutorial exercises on declaring and creating arrays, assigning and retrieving arra...
2016-10-15, 498👍, 0💬

'__init__()' Class Method to Initialize New Instance
What is the "__init__()" class method? The "__init__()" class method is a special method that will be automatically called, if you use the class name as a constructor to create a new instance of the class. Here are the rules you need to follow to define and use the "__init__()" class method: 1. Defi...
2018-01-27, 497👍, 0💬

"MyLib.cs" - VC# Class and Library
How to create a VC# class and build it into a library? If you want to create a VC# class and build it into a library, you can follow this tutorial: 1. Create the class source code file, MyLib.cs, with a text editor: // MyLib.cs // Copyright (c) FYIcenter.com using System; namespace fyi { public clas...
2017-08-06, 497👍, 0💬

Hyper Link Points to a Music File
What Happens If a Hyper Link Points to a Music File? If you want to build a hyper link to allow visitors to access a music/sound file by clicking a hyper link, you can put the URL of the music/sound file directly in the "href" attribute of the hyper link. If a visitor clicks the link, the browser wi...
2017-07-03, 497👍, 0💬

Missing Cells in HTML Table Row
What Happens If One Row Has Missing Columns? What happens if one row has missing columns? Most browsers will provide empty columns to the end of the row to make up the missing columns. For example, if your XHTML document has a table with the first row having 2 columns, and the second row having 3 co...
2017-05-05, 497👍, 0💬

Splitting a String in PHP
How To Split a String into Pieces? There are two functions you can use to split a string into pieces: explode(substring, string) - Splitting a string based on a substring. Faster than split(). split(pattern, string) - Splitting a string based on a regular expression pattern. Better than explode() in...
2016-10-13, 497👍, 0💬

Create Visual C# Project in Visual Studio 2017
How to Create a Visual C# Program Project with Visual Studio 2017? If you are new to Visual Studio 2017, you can follow tutorial to create your first Visual C# program project in Visual Studio 2017. 1. Start Visual Studio 2017 with .NET development environment. 2. Click "File &gt; New &gt; P...
2017-08-13, 496👍, 0💬

Protecting Special Characters in Query String in PHP
How To Protect Special Characters in Query String in PHP? If you want to include special characters like spaces in the query string, you need to protect them by applying the urlencode() translation function. The script below shows how to use urlencode(): &lt;?php print("&lt;html&gt;"); p...
2016-11-05, 496👍, 0💬

json_decode() - JSON Array to PHP Array
How to access elements from the PHP array returned from json_decode() on a JSON array? By default, json_decode() will convert a JSON Array to a PHP array with integer indexes of 0, 1, 2, ... There are different ways to access elements in the output PHP array: $array[i] - Returns the element of the g...
2018-03-04, 495👍, 0💬

Write Minimum Atom 1.0 Feed File
How to write a Minimum Atom 1.0 Feed File? If you want your Website to support a minimum Atom 1.0 feed, you can follow this tutorial. 1. First create a file called "atom.xml" with the following content: &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;feed xmlns="http://www.w3.org/2005/ A...
2017-12-13, 495👍, 0💬

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