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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, 2510🔥, 0💬

Docker Data Storage - "tmpfs" Mounts
How to create a new "tmpfs" mount to a Docker container? "tmpfs" mounts are stored in the host system’s memory only, and are never written to the host system’s filesystem. You have two options "--tmpfs" and "--mount" on the "docker container create/run" command to create "tmpfs" mounts. "--tmpfs" Op... 2021-08-15, 2505🔥, 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, 2503🔥, 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, 2501🔥, 0💬

Use Custom Variables in Policy Expressions
How to use custom variables created by "set-variable" statements in policy expressions? If you want to access custom variables created by "set-variable" statements, you can use the IReadOnlyDictionary object through "context.Variables". For example, the following policy creates a custom variable dur... 2018-01-24, 2500🔥, 0💬

Quoting Date and Time Values in PHP
How To Quote Date and Time Values in SQL Statements in PHP? If you want to provide date and time values in a SQL statement, you should write them in the format of "yyyy-mm-dd hh:mm:ss", and quoted with single quotes ('). The tutorial exercise below shows you two INSERT statements. The first one uses... 2016-10-19, 2500🔥, 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, 2489🔥, 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, 2487🔥, 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, 2486🔥, 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, 2485🔥, 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, 2484🔥, 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, 2480🔥, 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, 2478🔥, 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, 2475🔥, 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, 2460🔥, 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, 2459🔥, 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, 2450🔥, 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, 2450🔥, 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, 2429🔥, 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, 2422🔥, 1💬

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

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, 2421🔥, 0💬

Sign Out from Kindle for PC
How to sign out from Kindle for PC? Sign out from Kindle for PC is called "Deregister Kindle for PC". Deregister the Kindle for PC app from your Amazon account if it is registered to the wrong account or if you no longer want to use it to purchase Kindle books. To deregister the Kindle for PC app, y... 2022-07-01, 2420🔥, 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, 2411🔥, 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, 2405🔥, 0💬

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Blockchain Container EPUB General HTML JSON Microsoft Node.js PHP Python RSS Tools Visual Studio Web