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What Is a Result Set Object in PHP
What Is a Result Set Object in PHP? A result set object is a logical representation of data rows returned by mysql_query() function on SELECT statements. Every result set object has an internal pointer used to identify the current row in the result set. Once you get a result set object, you can use ...
2016-10-20, 2445🔥, 0💬

What Is a Persistent Cookie in PHP
What Is a Persistent Cookie in PHP? A persistent cookie is a cookie which is stored in a cookie file permanently on the browser's computer. By default, cookies are created as temporary cookies which stored only in the browser's memory. When the browser is closed, temporary cookies will be erased. Yo...
2016-11-04, 2439🔥, 0💬

'align' - Horizontal Alignment HTML Tables
How To Control Horizontal Alignment in Table Cells? By default, text in all table cells are aligned to the left horizontally. If you want to control horizontal alignment yourself, you need to use the "align" attribute in a "tr" element or a "td" element: &lt;tr align="left|center|right"& gt;...
2017-05-05, 2437🔥, 0💬

json_decode() - JSON Object to PHP Object
How to access properties from the PHP object returned from json_decode() on a JSON object? By default, json_decode() will convert a JSON Object to a PHP object of the default class "stdClass". There are different ways to access properties in the output PHP object: $obj-&gt;property_name - Return...
2018-03-04, 2432🔥, 0💬

Reading One Line of Text from a File in PHP
How To Read One Line of Text from a File in PHP? If you have a text file with multiple lines, and you want to read those lines one line at a time, you can use the fgets() function. It reads the current line up to the "\n" character, moves the file pointer to the next line, and returns the text line ...
2016-12-02, 2432🔥, 0💬

Supporting Hidden Form Fields in PHP
How To Support Hidden Form Fields in PHP? Hidden fields are special fields in a form that are not shown on the Web page. But when the form is submitted, values specified in the hidden fields are also submitted to the Web server. A hidden field can be specified with the &lt;INPUT TYPE=HIDDEN ...&...
2016-11-08, 2429🔥, 0💬

"Hello.c" - Compile and Run C Program
How to use Visual Studio command tools to compile and run a C program? If you want to compile and run a standard C program with Visual Studio command tools, you can follow this tutorial: 1. Create a simple C program, Hello.c, with a text editor: #include &lt;stdio.h&gt; void main() { printf(...
2017-08-21, 2424🔥, 0💬

Removing Leading and Trailing Spaces in PHP
How To Remove Leading and Trailing Spaces from User Input Values? If you are taking input values from users with a Web form, users may enter extra spaces at the beginning and/or the end of the input values. You should always use the trim() function to remove those extra spaces as shown in this PHP s...
2016-10-13, 2418🔥, 0💬

Add Operation to API on Publisher Portal - 2017 Version
How to add a new operation to an API on the Publisher Portal of an Azure API Management Service 2017 version? You can follow this tutorial to add a new operation to an API on the Publisher Portal of an Azure API Management Service. 1. Click API from the left menu on the Publisher Portal. You see the...
2018-07-18, 2407🔥, 0💬

"fabric-ca-client enroll" Error - "Failed to insert"
Why am I getting the "Certificate signing failure: Failed to insert record into database: attempt to write a readonly database" error, when running the "fabric-ca-client enroll" command? If the Fabric CA Server is not able to update its database, you will get the "Certificate signing failure: Failed...
2019-09-27, 2406🔥, 0💬

json.tool - JSON Pretty-Print Tool
What is json.tool? Can I use it to convert a JSON string a pretty-print format? json.tool is a special internal executable module - a module with main() so you can run it as Python script. When you run json.tool, (or json.module.main()), it will read a JSON string from the stand input and write the ...
2018-09-24, 2404🔥, 0💬

Introduction of EPUB 2.0 Specification
Where to find tutorials on introduction of EPUB 2.0 Specification? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on introduction of EPUB 2.0 Specification. What Is EPUB 2.0 Specification Minimum Requirement of EPUB 2.0.1 File Hello-2.0.epub - "m...
2019-01-12, 2399🔥, 0💬

'@{...}' Expression Blocks in Azure API Policy
How to use the "@{...}" expression block in Azure API Policy? The "@{...}" expression block in Azure API Policy can be used to include a C# statement block as the attribute value or text value in most policy statements. C# statement block in the "@{...}" expression block must end with a "return" sta...
2018-02-14, 2398🔥, 0💬

Using the 'context' Object in Policy Expressions
How to use the built-in "context" object in Policy expressions? The built-in "context" object can be used any "@(...)" expressions or "@{...}" expression blocks. The "context" object allows you to access information related to Azure API operation through its properties and methods. Here are some exa...
2018-02-14, 2390🔥, 0💬

Returning an Array from a Function in PHP
How To Return an Array from a Function? in PHP? You can return an array variable like a normal variable using the return statement. No special syntax needed. Here is a PHP script on how to return an array from a function: &lt;?php function powerBall() { $array = array(rand(1,55), rand(1,55), ran...
2016-12-18, 2377🔥, 0💬

"docker container run --detached" - Run Container in Background
How to Create a new Container and run it in the background using the "docker container run --detach" command? If you want to create an Alpine container and start a command that runs for a long time, you can use the --detach option to let it run in the background. 1. Create a new container with "alpi...
2018-12-01, 2371🔥, 0💬

EPUB 2.0 Metadata in Calibre Book Library
How to view EPUB 2.0 metadata in Calibre book Library? You can follow this tutorial to view EPUB 2.0 metadata in Calibre book library. 1. Click Row-Your-Boat-2.0.epub to download this sample EPUB 2.0 book. 2. Unzip and open package.opf. You see the following metadata elements: &lt;package xmlns=...
2019-01-12, 2369🔥, 0💬

Working with MySQL Database in PHP
Where to find tutorials on how to work with MySQL Database in PHP? A collection of tutorials to answer many frequently asked questions on how to Work with MySQL Database in PHP. Clear explanations and tutorial exercises are provided on connecting and selecting MySQL database, creating and dropping t...
2016-10-22, 2366🔥, 0💬

View Atom Feeds with Chrome Extension
How to View Atom Feeds with Google Chrome? I have the "Atom Subscription Extension" installed. If you have the "Atom Subscription Extension" installed, you can follow this tutorial to view Atom Feeds: 1. Launch Google Chrome 60. 2. Enter the following in the URL input box: http://dev.fyicenter.com/a...
2017-12-31, 2359🔥, 0💬

HTTP POST with urllib.request
How to send an HTTP POST request with urllib.request? I want to submit a form to a Website. To submit a form to a Website, you can use the urllib.request.urlopen() function with two arguments: r = urllib.request.urlopen(url, data) where: url can be a URL string or Request object data is request body...
2018-09-13, 2358🔥, 0💬

Use '@(...)' Expressions in XML Attributes
When using "@(...)" expressions in XML attributes as part of an policy statement, do I need to worry about string quotations? If you are using a "@(...)" expression in XML attributes as part of an policy statement, and string literals are used in the "@(...)" expression, the syntax of the final poli...
2017-11-12, 2358🔥, 0💬

JSON-parse-Transformed.html - JSON.parse() Value Transformed
How to write a reviver function to transform values while the JSON.parse() function is parsing the JSON text string? Below is a good example on using a reviver function with the JSON.parse() call to transform parsed JSON element values: &lt;!-- JSON-parse-Transformed.html Copyright (c) FYIcenter...
2017-09-08, 2354🔥, 0💬

Uploading Files into Database in PHP
How To Upload Files into Database in PHP? To store uploaded files to MySQL database, you can use the normal SELECT statement as shown in the modified processing_uploaded_files.php listed below: &lt;?php $con = mysql_connect("localhost", "", ""); mysql_select_db("fyi"); $error = $_FILES['fyicente...
2017-02-20, 2351🔥, 1💬

💬 2017-02-20 Jonas: Thanks for the sample code!

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, 2344🔥, 0💬

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