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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, 999👍, 0💬

3Pigs5-3.0.epub - Title Page and TOC
How to add a title page and a table of content page to my EPUB book? If you want to add a title page and a table of content page to your EPUB 3.1 book, you can follow this tutorial. 1. Create a title page in an XHTML file like Title-Page.xhtml: &lt;?xml version="1.0" encoding="utf-8"?&gt; &a...
2018-08-14, 993👍, 0💬

Real Atom XML Examples
Where to get a real Atom XML example? You can follow this tutorial to get a real Atom XML example: 1. Go to FYIcenter.com Developer Website. 2. Scroll to the bottom and click the "Atom" link. You see an Atom XML document displayed as an XML tree or as new feeds depending on the Web browser you are u...
2017-12-26, 992👍, 0💬

RSS "channel/textInput" Element
What is the RSS "channel/textInput" element? The RSS "channel/textInput" element is an optional sub element of the "channel" element to specify a text input box that can be used to send data back to the channel. The RSS "channel/textInput" element contains the following sub elements. title - REQUIRE...
2017-11-11, 992👍, 0💬

'@...' Function Decorators
What are function decorators in Python? A function decorator is shorthand notation to replace a function with a new version transformed by a wrapper function. A function decorator can be specified using the following syntax: @decorator_wrapper_function def func(): ... Above Python code is actually e...
2018-05-08, 984👍, 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, 983👍, 0💬

Sorting an Array by Keys in PHP
How To Sort an Array by Keys in PHP? Sorting an array by keys can be done by using the ksort() function. It will re-order all pairs of keys and values based on the alphanumeric order of the keys. Here is a PHP script on how to use ksort(): &lt;?php $mixed = array(); $mixed["Zero"] = "PHP"; $mixe...
2017-01-21, 980👍, 0💬

EPUB 3.0 Metadata - dc:subject Element
What is EPUB 3.0 Metadata "dc:subject" Element? EPUB 3.0 Metadata "dc:subject" is an optional metadata element to specify the subject category of the EPUB 3.0 book. When using "dc:subject" metadata element, you should follow an industry standard like: BISAC (Book Industry Standards And Communication...
2018-04-28, 979👍, 0💬

Real RSS XML Examples
Where to get a Real RSS XML example? You can follow this tutorial to get a real RSS XML example: 1. Go to FYIcenter.com Developer Website. 2. Scroll to the bottom and click the "RSS" link. You see an RSS XML document displayed as an XML tree or as new feeds depending on the Web browser you are using...
2018-01-08, 977👍, 0💬

Testing Area
What is test testing area for? The testing area is provided to allow visitors to post testing comments.
2017-12-05, 973👍, 10💬

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3Pigs2-3.1.epub - Multiple XHTML Files
Can I divide the book content into multiple XHTML files? Yes, you can divide the book content into multiple XHTML files. If your has multiple chapters, you should consider to create one XHTML file per chapter. For example, you can download this EPUB book, 3Pigs2-3.1.epub, which has "The Three Little...
2019-01-12, 972👍, 0💬

Installing 'requests' Module
How to install "requests" module? I am getting the "ModuleNotFoundError: No module named 'requests'" error. If you are getting the following error when running "import requests", you need to follow this tutorial to install the "requests" module. C:\fyicenter&gt;python Python 3.6.2 (v3.6.2:5fd33b...
2018-09-01, 970👍, 0💬

EpubCheck 4.0.2 --json Option
What is EpubCheck 4.0.2 "--json" Option? EpubCheck 4.0.2 "--json" option allows you to generate a JSON output file containing all properties of the EPUB book. You can try it on Hello-3.0.epub: \fyicenter&gt;java -jar epubcheck-4.0.2\epubcheck.jar --json Hello.json Hello-3.0.epub No errors or war...
2018-11-17, 965👍, 0💬

Atom Element Types: "feed" and "entry"
What are main Atom element types? There are 2 main element types defined for Atom feed files: Atom Feed Element - Representing an Atom feed, including metadata about the feed, and some or all of the entries associated with it. Its root element is the &lt;feed&gt; element. Atom Entry Element ...
2017-12-09, 962👍, 0💬

EPUB 3.0 Metadata - dc:language Element
What is EPUB 3.0 Metadata "dc:language" Element? EPUB 3.0 Metadata "dc:language" is a required metadata element to specify the primary language of the EPUB 3.0 book. When using "dc:language" metadata element, you should the an ISO 639 language code to specify the language. For example, the following...
2018-05-19, 961👍, 0💬

HTML Tables and Table Cells
Where to find tutorials of introduction to HTML Tables and Table Cells? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team in introduction to HTML Tables and Table Cells. Clear answers are provided with tutorial exercises on table elements like: tabl...
2017-05-20, 957👍, 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, 956👍, 0💬

View EPUB 3.0 Metadata List with Calibre
How to see more EPUB 3.0 metadata list with Calibre? You can follow this tutorial to view EPUB 3.0 metadata list with Calibre. 1. Click Row-Your-Boat-3.0.epub to download this sample EPUB 3.0 book. 2. Add Row-Your-Boat-3.0.epub to Calibre book library. You see some EPUB 3.0 metadata displayed below ...
2018-04-28, 955👍, 0💬

Merging Two Arrays into a Single Array in PHP
How To Merge Values of Two Arrays into a Single Array in PHP? You can use the array_merge() function to merge two arrays into a single array. array_merge() appends all pairs of keys and values of the second array to the end of the first array. Here is a PHP script on how to use array_merge(): &l...
2017-01-11, 955👍, 0💬

'width' for HTML Table Widths
How To Control Table Widths? Usually, browsers will calculate the table width based on the content widths of table cells. If you want to control the width of a table, you need to use the "width" attribute, which allows you to set the table width in pixels or percentages of the parent element width. ...
2017-05-05, 951👍, 0💬

3Pigs5-3.1.epub - Title Page and TOC
How to add a title page and a table of content page to my EPUB book? If you want to add a title page and a table of content page to your EPUB 3.1 book, you can follow this tutorial. 1. Create a title page in an XHTML file like Title-Page.xhtml: &lt;?xml version="1.0" encoding="utf-8"?&gt; &a...
2018-12-26, 946👍, 0💬

EPUB 3.0 Metadata - dc:identifier Element
What is EPUB 3.0 Metadata "dc:identifier" Element? EPUB 3.0 Metadata "dc:identifier" is a required metadata element to specify a code that uniquely identifies the EPUB 3.0 book. To use "dc:identifier" properly, you need to meet the following two requirements: 1. &lt;package unique-identifier="bo...
2018-06-01, 946👍, 0💬

EPUB 3.0 Metadata - dc:description Element
What is EPUB 3.0 Metadata "dc:description" Element? EPUB 3.0 Metadata "dc:description" is an optional metadata element to specify a long description of the EPUB 3.0 book. Here is a good example of a "dc:description" metadata element &lt;dc:description&gt; "Row,Row, Row Your Boat" is a popula...
2018-04-28, 946👍, 0💬

Examples of Invalid JSON Values
Where to see some Examples of Invalid JSON Values? Here are some Examples of Invalid JSON Values: 1. Invalid JSON Strings: 'John' - Wrong quotes "John says "Hello!"" - " inside the string must use escape sequence \" 2. Invalid JSON Numbers: $1.00 - Currency sign is now allowed in numbers 99.00 * 0.1...
2017-08-13, 946👍, 0💬

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