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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, ∼2288🔥, 0💬

Hello-3.0.epub Displayed in Calibre
How to display Hello-3.0.epub in Calibre? Once you have Hello-3.0.epub created, you can follow this tutorial to open and read it in Calibre. 1. Search and run Calibre on your Windows computer. You see the Calibre main screen. 2. Click "Add books" icon. You see the open file screen. 3. Locate and sel... 2018-11-11, ∼2287🔥, 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, ∼2287🔥, 0💬

BYFN Error - "unable to bootstrap orderer"
Why am I getting the "panic: unable to bootstrap orderer. Error reading genesis block file: read /var/hyperledger/orderer/order er.genesis.block:is a directory" error? When you build and deploy your BYFN network manually, you may end up missing the genesis.block file. Try to run the "docker-compose ... 2020-10-10, ∼2284🔥, 0💬

Function Calling Expressions
How to call a function in an expression in Python? To call a function and execute its statement block in an expression, you can enter the function name followed by a list of values to be assigned to parameters defined in the function. For example, the profile("Joe",25) expression calls the "profile(... 2023-03-22, ∼2280🔥, 2💬

Function Calling Expressions
How to call a function in an expression in Python? To call a function and execute its statement block in an expression, you can enter the function name followed by a list of values to be assigned to parameters defined in the function. For example, the profile("Joe",25) expression calls the "profile(... 2023-03-22, ∼2280🔥, 2💬

Implicit and Explicit ID of JSON Type
What are differences of the implicit ID and the explicit ID of a JSON type in JSON Schema? If a JSON type is defined under a "definitions" property, it could have two identifications: 1. Implicit identification: The implicit identification of a JSON type is an internal bookmark in the form of "#/def... 2017-08-20, ∼2279🔥, 0💬

Returning a Value from a Function in PHP
How To Return a Value Back to the Function Caller? in PHP? You can return a value to the function caller by using the "return $value" statement. Execution control will be transferred to the caller immediately after the return statement. If there are other statements in the function after the return ... 2016-12-24, ∼2276🔥, 0💬

"docker run --entrypoint" - Override Default Command
How to override the default command in a Docker image using the "docker run --entrypoint" command? Each Docker image has default command defined as the "ENTRYPOINT" which will run automatically when you start the container created from the image. But you can override it with the "docker run --entryp... 2022-12-15, ∼2274🔥, 0💬

PHP Configuration Setting File
Where Are PHP Configuration Settings Stored? PHP stores configuration settings in a file called php.ini in PHP home directory. You can open it with any text editor to your settings.     ⇒ Running a PHP Script ⇐ Verifying PHP Installation ⇑ Downloading and Installing PHP ⇑⇑ PHP Tutorials 2016-10-13, ∼2274🔥, 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, ∼2273🔥, 0💬

Defining a User Function in PHP
How To Define a User Function? in PHP? You can define a user function anywhere in a PHP script using the function statement like this: "function name() {...}". Here is a PHP script example on how to define a user function: &lt;?php function msg() { print("Hello world!\n"); } msg(); ?&gt; Thi... 2016-12-28, ∼2271🔥, 0💬

JSON to XML Conversion at jsonformatter.org
How to use the JSON to XML Conversion Tool at jsonformatter.org? If you want to try the JSON to XML Conversion Tool at jsonformatter.org, you can follow this tutorial: 1. Go to the JSON to XML Conversion Tool page at jsonformatter.org. 2. Enter the following JSON value in the text area: ["Hello", 3.... 2023-09-05, ∼2270🔥, 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, ∼2268🔥, 0💬

What Is JSON?
What Is JSON? JSON (JavaScript Object Notation) is a standard text string format that uses human-readable text to record data objects consisting of attribute–value pairs and array structures. JSON was specified by Douglas Crockfor in in the early 2000s. It was originally derived from JavaScript, but... 2023-04-25, ∼2265🔥, 0💬

Common Errors in Reported by EpubCheck
Where to find tutorials on Common Errors Reported by EpubCheck? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Common Errors Reported by EpubCheck. ERROR(PKG-006) - Mimetype Not the First ERROR(PKG-005) - Mimetype Has Extra Field ERROR(OPF-030... 2022-02-09, ∼2264🔥, 0💬

Hello-2.0.epub - "container.xml" File
How to create the "container.xml" file of an EPUB 2.0.1 book? The "container.xml" file of an EPUB 2.0.1 book is a required file in the book ZIP container. It specifies a package file of any name, for example: package.opf. Here is the requirement on the "container.xml" file: 1. The "container.xml" fi... 2023-05-09, ∼2263🔥, 0💬

JSON Text String Example
Where to get a simple example of JSON text string? You can go to JSON at Wikipedia to get the following JSON text string example: { "firstName": "John", "lastName": "Smith", "isAlive": true, "age": 25, "address": { "streetAddress": "21 2nd Street", "city": "New York", "state": "NY", "postalCode": "1... 2023-09-07, ∼2261🔥, 0💬

Number of Rows Affected by a SQL Statement in PHP
How To Get the Number of Rows Selected or Affected by a SQL Statement in PHP? There are two functions you can use the get the number of rows selected or affected by a SQL statement: mysql_num_rows($rs) - Returns the number of rows selected in a result set object returned from SELECT statement. mysql... 2016-10-20, ∼2261🔥, 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, ∼2260🔥, 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, ∼2258🔥, 0💬

Looping through an Array in PHP
How to Loop through an Array in PHP? The best way to loop through an array is to use the "foreach" statement. There are two forms of "foreach" statements: foreach ($array as $value) {} - This gives you only one temporary variable to hold the current value in the array. foreach ($array as $key=&g... 2017-02-03, ∼2256🔥, 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, ∼2255🔥, 0💬

Comparing Two Strings in PHP
How To Compare Two Strings with Comparison Operators? PHP supports 3 string comparison operators, &lt;, ==, and &gt;, that generates Boolean values. Those operators use ASCII values of characters from both strings to determine the comparison results. Here is a PHP script on how to use compar... 2016-10-13, ∼2253🔥, 0💬

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