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Removing Values Saved in the Session in PHP
How To Remove Values Saved in the Current Session in PHP? If you want to remove values saved in the current session, you should use the unset() function on those saved values in $_SESSION, or use array() to empty $_SESSION: unset($_SESSION['MyColor']) - Removes one value named MyColor in the current...
2016-10-24, ∼2833🔥, 0💬

Removing an Empty Directory in PHP
How To Remove an Empty Directory in PHP? If you have an empty existing directory and you want to remove it, you can use the rmdir(). Here is a PHP script example on how to use rmdir(): &lt;?php if (file_exists("/temp/download") ){ rmdir("/temp/download"); print("Directory removed.\n"); } else { ...
2016-11-24, ∼2832🔥, 0💬

JSON Type Unique Identifications
How to assign a unique identification to a JSON type in JSON Schema? Using "definitions" and "$ref" properties allows to define JSON types and reference them internally in the same JSON schema or externally in another JSON schema. You can also assign a unique identification to a JSON type with the "...
2017-08-20, ∼2831🔥, 0💬

JSON Type Metadata
How to add documentation information to a JSON type with metadata? You can add documentation information to a JSON type with there metadata properties: "title" - Takes a JSON string as a short description for this JSON type. "description" - Takes a JSON string as a long description for this JSON typ...
2023-07-08, ∼2830🔥, 0💬

What Are HTML List Elements
What Are HTML List Elements? HTML offers 3 list elements: "ol" - Ordered List: A list of items with leading sequential numbers. "ul" - Unordered List: A list of items with leading bullets. "dl" - Definition List: A list of items with leading terms. Here are some generic rules about list elements: Li...
2017-06-16, ∼2830🔥, 0💬

JSON Validation at fyicenter.com
How to use the JSON Validation Tool at fyicenter.com? If you want to try the JSON Validation Tool at fyicenter.com, you can follow this tutorial: 1. Go to the FYIcenter JSON Validator and Formatter page at fyicenter.com. 2. Enter the following JSON text string in the text area: { "firstName": "John"...
2023-08-17, ∼2829🔥, 0💬

HTML 'table' Element Attributes
What Are the Attributes of a "table" Element? A "table" element may have the following commonly used attributes: "summary" - Specifies a text string as the summary of the table. "width" - Specifies the width of the table. "border" - Specifies the border width. "frame" - Specifies how the outer borde...
2017-05-13, ∼2829🔥, 0💬

HTML Document Example
What Does an HTML document look like? An HTML 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: "&lt;" and "&gt;". Below is how a simple HTML document looks like if you open it in a text editor: &am...
2017-02-20, ∼2829🔥, 0💬

Decode Azure AD v2 id_token
How to decode the id_token value received from Azure AD v2.0 authentication response? According to the "RFC 7519 - JWT (JSON Web Token)" standard, the "id_token" value received from Azure AD authentication response should be decoded as below: Splitting the encoded string into 3 components: Header, B...
2019-04-03, ∼2828🔥, 0💬

Printing Python Engine Information
How to print out Python engine information? Here is a Python example on how to print out Python engine information: &gt;&gt;&gt; import sys &gt;&gt;&gt; sys.getwindowsversion() sys.getwindowsversion(major=6, minor=1, build=7601, platform=2, service_pack='Service Pack 1') &...
2018-11-11, ∼2826🔥, 0💬

Using HTML 'checkbox' Input Fields
How To Use "checkbox" Input Fields? A "checkbox" input field is defined as &lt;input type="checkbox" .../&gt;. A "checkbox" input field can be used to create a checkbox to allow viewers to switch on or off a boolean flag. There are other attributes you may need to use for a "checkbox" input ...
2017-04-15, ∼2825🔥, 0💬

Security of Storing Session ID as a Cookie in PHP
Is It More Secure to Use Cookies to Transfer Session IDs in PHP? Is it more secure to use cookies to transfer session IDs? The answer is yes, because attacking your Web site using URL parameters is much easier than using cookies. So if you are the system administrator of your Web server, you should ...
2016-10-25, ∼2822🔥, 0💬

What Is Smart Contract
What Is Smart Contract? Smart Contract was originally introduced by Nick Szabo to digitally facilitate, verify, or enforce the negotiation or performance of a contract between parties. Today, smart contract is used to represent any executable code deployed in a distributed ledger application. The di...
2022-02-19, ∼2820🔥, 0💬

Using HTML 'radio' Input Fields
How To Use "radio" Input Fields? A "radio" input field is defined as &lt;input type="radio" .../&gt;. "radio" input fields can be used to create a group of radio buttons to allow viewers to push one and only one button in the group. There are other attributes you may need to use for a "radio...
2017-04-15, ∼2819🔥, 0💬

URL Starts with Path or File name
What Happens If a URL Starts with Path or File name? If a URL starts with a path name, the browser will borrow the protocol name, the host name, and the port number from the URL of the current document to make up the missing parts. For example, if the following URL is used in this document you are v...
2017-07-07, ∼2817🔥, 0💬

Specifying Input Values for Checkboxes in PHP
How To Specify Input Values for Checkboxes in PHP? Checkboxes can be used in a form for two situations: As a single switch - One &lt;INPUT TYPE=CHECKBOX ...&gt; tag, with no input value specified. When submitted with button pushed down, you will receive a value of "on". When submitted with b...
2016-11-13, ∼2816🔥, 0💬

'import' Module Loading Statement
How to use "import" statement to load Python modules? If you created a Python module file called "firstModule.py" as described in the previous tutorial, you can load it into your Python execution session using the "import" statement: 1. Make sure the module file is in the current directory: \fyicent...
2022-08-26, ∼2815🔥, 0💬

HTML Versions and Variations
What are versions and variations of the HTML standard? HTML was developed by Tim Berners-Lee in 1980. HTML Inventor: Tim Berners-Lee Since then, a number of versions and variations of the HTML standard were published: HTML 5.1 was published as a W3C Recommendation on November 1, 2016. HTML5 was publ...
2017-02-20, ∼2814🔥, 0💬

Timeout Period on Session Values in PHP
What Is the Timeout Period on Session Values in PHP? The PHP engine has no direct settings on session timeout period. But it has a session garbage collection mechanism that you can set to remove those special files containing session values. There are 3 settings you can use to define the session gar...
2016-10-25, ∼2814🔥, 0💬

HTML 'code' Tag/Element
What Is an HTML "code" Tag/Element? An "code" element is an inline element that you can use to specify text to be treated as computer code. Here are basic rules about "code" elements: "code" elements are inline elements. "code" elements can not be used at block level. Contents of "code" elements wil...
2017-04-28, ∼2812🔥, 0💬

Register Azure AD B2C Application
How to register my application as an Azure AD B2C application in my Azure AD B2C account? If you want to register an application as an Azure AD B2C application in your Azure AD B2C account, your application should be: Able to allow users who are members and their identities are managed locally in th...
2019-03-08, ∼2811🔥, 0💬

Install RSS Subscription Extension for Chrome
How to Install RSS Subscription Extension for Chrome? RSS Subscription Extension for Chrome auto-detects RSS feeds on the page you are reading and upon finding one will display an RSS icon in the Omnibox, allowing you to click on it to preview the feed content and subscribe. If you want to install R...
2017-10-16, ∼2811🔥, 0💬

Defining and Using Class for New Data Types
Where to find tutorials on Defining and Using Class for New Data Types in Python? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Defining and Using Class for New Data Types in Python: What Is Class 'class' - Class Definition Statements Classes...
2018-05-08, ∼2810🔥, 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, ∼2804🔥, 0💬

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