Category Archives: Javascript

JS – Project1 – Mobile JS Menu (+ more)

This demo series will show you how you can make your navigation mobile friendly and accessible using jQuery whether javascript is enabled on the client-side or not.

JS Mobile Menu Demo Series

This series is approximately 45 minutes long. You should expect it to take at least twice that time to do complete the work.

1 – Menu setup (18min)
2 – jQuery setup and custom script (17min)
3 – Styling the menu for proper behavior (13min)



Continue reading JS – Project1 – Mobile JS Menu (+ more)

JS : Single Page Parallax Resume

What is in this tutorial?

  • Mobile-first design principles
  • Learn how ‘vh’ viewport height works
  • Learn how to vertically and horizontally center elements on page
  • Writing jQuery script for collapsible navigation menu
  • Applying parallax smooth scrolling jQuery script for single page navigation
  • Applying Lightbox 2 jQuery effects to gallery

Please watch all videos below to complete the tutorial.

Continue reading JS : Single Page Parallax Resume

PHP – Lesson 10 : Functions

Functions Overview

What is a function?

  • A function is a way to write modularized code that can be used more than once just by calling out its function name in a script.

Where do I find functions?

  • Functions are largely what PHP is built on. PHP has over 3000 built-in functions you can use so you don’t have to reinvent the wheel every time you want to do a set of tasks.
  • You can also create your own custom funtions to perform custom tasks.

What are advantages of using functions?

  • For tasks you need to repeat in several places in the code, you can simple call out a funtion from a centralized place instead of writing the same coded over and over.
  • When updating the code, you can update a single function in one place rather than modifying code in several places.
  • They usually speed up the processing time of your pages.

How do I make my own function?

Let’s say you want to create a function that automatically adds the sales tax into a subtotal to give you a final price. We will call it “Total” and the tax will be 7.75%, as follows:

  • function Tax($subtotal) {
    return $subtotal *= .0775;

What this will do is take any value called by the “Tax” function and substitute that passed value in place of “$subtotal.” For instance, if we are explicit and want to find the tax on twenty dollars, we could invoke the function as follows:

  • $tax = Tax(20);
    echo "\$$tax";

This would result in outputting the string (no quotes) of ” $1.55 “. You could produce the same results by running the function on a variable instead of a raw number:

  • $amount = 20;
    $tax = Tax($amount);
    echo "\$$tax";

Variable Scope And Functions

It is important to note that functions are self-contained. What happens with variables inside of a function is invisible to the rest of the script outside of the function. When variables are passed as arguments to a function, only the value is passed; thus, once the function completes its task, the variables inside of it cease to exist, and they are only created or invoked again if the function is reused.

“The scope of a variable – in other words, where it can be used – depends entirely on where the variable is defined. A variable defined in a function or as one of its parameters is limited in scope to that function. It cannot be seen outside the function. Equally, a function has no knowledge of or influence over variables outside.”

(from Adobe Dreamweaver CS5 with PHP by David Powers)

Demo : Create a User-Defined Gallery Function

To learn how you can create a user-defined gallery function, go to the “Creating a Gallery Function” demo page. It will show you how you can write a customizable gallery function that scans gallery directories to populate thumbnail galleries with larger lightbox effect opening images. No database necessary. . . . Additionally, it covers the concepts important to reusable code (i.e. functions).