phpfiddle

<?php
abstract class User {
    protected $scores = 0;
    protected $numberOfArticles = 0;
    public function setNumberOfArticles($int) {
        $numbeOfArticles = (int)$int;
        $this->numberOfArticles = $numbeOfArticles;
    }
    public function getNumberOfArticles() {
        return $this->numberOfArticles;

phpfiddle

<?php
class User {
    protected $username;
    public function setUsername($uname) {
        $this->username = $uname;
    }
    public function getUsername() {
        return $this->username;
    }
}

phpfiddle

<?php
abstract class User {
    protected $username;
    public function setUsername($uname) {
        $this->username = $uname;
    }
    public function getUsername() {
        return $this->username;
    }
    abstract public function stateYourRole();

phpfiddle

<?php
// simple inheritance and modifiers example.
 class User {
     private $username;
     public function setUsername($uname) {
         $this->username = $uname;
     } 
     public function getUsername() {
         return $this->username;
     }

phpfiddle

This gist was removed completely.

phpfiddle

h1 {
 text-align: center;
}

phpfiddle

<?php
/*
 * ip_in_range.php - Function to determine if an IP is located in a
 *                   specific range as specified via several alternative
 *                   formats.
 *
 * Network ranges can be specified as:
 * 1. Wildcard format:     1.2.3.*
 * 2. CIDR format:         1.2.3/24  OR  1.2.3.4/255.255.255.0
 * 3. Start-End IP format: 1.2.3.0-1.2.3.255

phpfiddle

<?php
    /**
    *   Live Coding Section
    *   - You don't need to finish all of this.  
    *   - Using the internet to look things up is encouraged.
    */
    
    echo 'Live Coding Section starts here! <br/><br/>';

    // Write three functions that compute the sum of the numbers in a given list using: a for-loop, a while-loop, and then recursion.

phpfiddle

<?php

$data[] = [
            'sponsor_id' => 2,
            'enroller_id' => 4,
            ];
//using [] after $data will concatenate otherwise override
$data[] = [
            'sponsor_id4' => 2,
            'enroller_id5' => 4,

phpfiddle

<pre>
<?php

$key = md5(utf8_encode("MobileAppSecureKey"), true);
$data = base64_decode("bkCfcseIt/TPsgNCdyX9fv2/4MjOJdaPXakNNbxQT3n6tXHa5bDoXojQ3g7jPLCu+wjwD0guQzw3hCFUSVx47PmDNHASk7g/kJ4K4tX0VGI=");

for($i = 0; $i < 8; $i++) {
    $key[$i + 16] = $key[$i];
}