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Testing If a Variable Is an Array in PHP
How To Test If a Variable Is an Array in PHP? Testing if a variable is an array is easy. Just use the is_array() function. Here is a PHP script on how to use is_array(): &lt;?php $var = array(0,0,7); print("Test 1: ". is_array($var)."\n"); $var = array(); print("Test 2: ". is_array($var)."\n"); ...
2016-10-15, ∼2880🔥, 0💬

What Is RSS and Atom Aggregator
What Is an RSS and Atom Aggregator? A RSS aggregator, also called RSS reader, is software application that allows you to subscribe to many RSS or Atom feeds from various sources and read them in one place. A RSS aggregator usually provides a big list of RSS feeds from popular news providers. But it ...
2017-10-08, ∼2878🔥, 0💬

Escape Sequences in Single-Quoted Strings in PHP
How Many Escape Sequences Are Recognized in Single-Quoted Strings? There are two special characters you need to escape in a single-quote string: the single quote (') and the back slash (\). Here is a PHP script example of single-quoted strings: &lt;?php echo 'Hello world!'; echo 'It\'s Friday!';...
2016-10-13, ∼2878🔥, 0💬

RSS "channel" Element
What is the RSS "channel" element? The RSS "channel" element presents a group of RSS feed items generated by the same producer. The RSS "channel" element contains the following sub elements. title - REQUIRED. The name of your Website, if you are producing this RSS feed. For example: &lt;title&am...
2017-11-11, ∼2872🔥, 0💬

Finding a Given Value in an Array in PHP
How To Find a Specific Value in an Array in PHP? There are two functions can be used to test if a value is defined in an array or not: array_search($value, $array) - Returns the first key of the matching value in the array, if found. Otherwise, it returns false. in_array($value, $array) - Returns tr...
2017-01-21, ∼2870🔥, 0💬

'trace' Policy Statement
How to use the "trace" Policy Statement for an Azure API service operation? The "trace" policy statement allows you to generate debugging messages into the API trace output. The "trace" statement can be used in any policy blocks in the policy XML document. The "trace" statement has the following syn...
2018-03-10, ∼2866🔥, 0💬

Converting Strings to Numbers in PHP
How To Convert Strings to Numbers? In a numeric context, PHP will automatically convert any string to a numeric value. Strings will be converted into two types of numeric values, double floating number and integer, based on the following rules: The value is given by the initial portion of the string...
2016-10-13, ∼2866🔥, 0💬

Visual Studio 2017 Visual C++ Program Folders
In which folders Visual Studio 2017 Visual C++ programs are located on my Windows computer? When Visual Studio 2017 Visual C++ is installed on your Windows computer, its programs are located the following folders: Location: C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC Programs: ....
2023-12-10, ∼2865🔥, 0💬

Start Hyperledger Composer Playground
How to Start the Hyperledger Composer Playground? You can follow this tutorial to start the Hyperledger Composer Playground. 1. Run Web browser and go to: composer-playground.mybluemix. net. You see the welcome page. 2. Click on "Let's Blockchain!". You see the playground home page. 3. Now you can s...
2021-12-28, ∼2862🔥, 0💬

Install Docker CE on CentOS with YUM
How to install Docker CE (Community Edition) on CentOS with YUM tool? You can follow this tutorial to install Docker CE on CentOS with YUM tool. 1. Verify OS, Kernel and Architecture: fyicenter$ hostnamectl Operating System: CentOS Linux 7 (Core) Kernel: Linux 3.10.0-693.5.2.el7.x86_64 Architecture:...
2023-03-17, ∼2861🔥, 0💬

Atom Better than RSS
Should I use Atom or RSS? Which one is better? At a higher level, Atom and RSS are doing the job, offering a format for Websites to publish their news feeds. But if you take a closer look, Atom does a better job than RSS in several areas. For example: Atom has better date format - Atom uses the ISO ...
2017-09-28, ∼2861🔥, 0💬

Using MySQL Command Line Interface in PHP
How To Use MySQL Command Line Interface in PHP? MySQL server comes with a command line interface, which will allow you to operate with the server with SQL statements and other commands. To start the command line interface, you can run the \mysql\bin\mysql program. The tutorial exercise below shows y...
2016-10-22, ∼2861🔥, 0💬

Reading One Character from a File in PHP
How To Read One Character from a File in PHP? If you have a text file, and you want to read the file one character at a time, you can use the fgetc() function. It reads the current character, moves the file pointer to the next character, and returns the character as a string. If end of the file is r...
2016-12-02, ∼2858🔥, 0💬

Number of Cookies Supported in PHP
How Many Cookies Can You Set in PHP? How many cookies can you set in your PHP page? The answer is depending what is the Web browser your visitor is using. Each browser has its own limit: Internet Explorer (IE): 20 Mozilla Firefox: 50 If you want to test this limit, copy this sample script, how_many_...
2016-10-30, ∼2856🔥, 0💬

JSON Schema Validation Keywords
How many validation keywords are supported in JSON Schema? The current JSON Schema specification supports 29 validation keywords: "multipleOf" - If the JSON instance is a number, it must be a multiple of the given value. "maximum" - If the JSON instance is a number, it must be less than or equal to ...
2017-09-01, ∼2852🔥, 0💬

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, ∼2851🔥, 0💬

What Is Python Module 'urllib'
What Is Python module "urllib"? "urllib" is a Python internal module that allows you to communicate with Internet resources that are represented by URLs. Two main Internet protocols are supported: HTTP and FTP. The current version of "urllib" module is divided into 4 sub-modules: urllib.request - fo...
2018-09-24, ∼2851🔥, 0💬

Start Python in Interactive Mode
How to Start Python in Interactive Mode on my Windows computer? You can start Python in interactive mode on your Windows computer in several ways: 1. "python" in command window - In a command window, enter the "python" command. If the python installation folder is in the PATH environment variable, t...
2023-01-06, ∼2841🔥, 0💬

EpubCheck 4.0.2 --out Option
What is EpubCheck 4.0.2 "--out" Option? EpubCheck 4.0.2 "--out" option allows you to generate an XML output file containing all properties of the EPUB book. You can try it on Hello-3.0.epub: C:\fyicenter&gt; java -jar epubcheck-4.0.2\epubcheck.jar --out Hello.xml Hello-3.0.epub No errors or warn...
2018-06-01, ∼2841🔥, 0💬

View RSS Feeds with Mozilla Firefox
How to View RSS Feeds with Mozilla Firefox? If you want to view RSS Feeds with Mozilla Firefox, you can follow this tutorial: 1. Launch Mozilla Firefox 55. 2. Enter the following in the URL input box: http://dev.fyicenter.com/rss_x ml.php3. Press "Enter" key. You see the RSS feed items displayed in ...
2017-11-02, ∼2840🔥, 0💬

What Is PHP JSON Extension
What Is the PHP JSON Extension? The PHP JSON Extension is a standard extension included in the PHP distribution since PHP 5.2.0 version to support JavaScript Object Notation (JSON) data-interchange format defined in RFC 7159. The PHP JSON Extension provides 4 main functions: json_decode() — Decodes ...
2023-02-28, ∼2835🔥, 0💬

Passing Variables by References in PHP
How To Pass Variables By References? in PHP? You can pass a variable by reference to a function by taking the reference of the original variable, and passing that reference as the calling argument. Here is a PHP script on how to use pass variables by references: &lt;?php function swap($a, $b) { ...
2016-12-24, ∼2834🔥, 0💬

"MathFuncsLib.h" - Header File of Static Library
How to create a C++ Header File for a Static Library? Using a static library (.lib file) is a great way to reuse code. Rather than re-implementing the same routines in every app that requires the functionality, you write them one time in a static library and then reference it from the apps. Code lin...
2023-10-15, ∼2832🔥, 0💬

re.split() - Splits with Regular Expression
How to split a given string with a regular expression as the delimiter using re.split()? The re.split() function allows you to split a given target string using matches of a given regular expression as the delimiter. import re l = re.split(pattern, string, maxsplit=0, flags=0) Where: pattern is the ...
2018-10-13, ∼2832🔥, 0💬

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