Welcome, aspiring programmers and enthusiasts, to an illuminating journey into the depths of PHP mastery. Here at ProgrammingHomeworkHelp.com, we understand the challenges that come with grappling with PHP assignments. That's why our team of seasoned experts stands ready as your trusted PHP assignment helper, offering not just solutions, but insights to empower your understanding. Today, we delve into the intricacies of advanced PHP concepts through meticulously crafted questions and expert solutions. Let's embark on this voyage of knowledge together.

Question 1: Advanced Array Manipulation

In a web application, you're tasked with manipulating an array of user data. Each element of the array represents a user, with keys such as "name," "age," and "email." Your goal is to filter out users who are under 18 years old and sort the remaining users alphabetically by name. Implement this functionality in PHP.

Solution 1:

```php
?php
// Sample user data array
$users = array(
    array("name" = "Alice", "age" = 25, "email" = "alice@example.com"),
    array("name" = "Bob", "age" = 17, "email" = "bob@example.com"),
    array("name" = "Charlie", "age" = 20, "email" = "charlie@example.com")
);

// Filter users under 18
$filtered_users = array_filter($users, function($user) {
    return $user["age"] = 18;
});

// Sort remaining users alphabetically by name
usort($filtered_users, function($a, $b) {
    return strcmp($a["name"], $b["name"]);
});

// Output the filtered and sorted users
foreach ($filtered_users as $user) {
    echo "Name: " . $user["name"] . ", Age: " . $user["age"] . ", Email: " . $user["email"] . "\";
}
?
```

Explanation 1:

In this solution, we first use `array_filter()` to remove users under 18 from the array. Then, we employ `usort()` to sort the remaining users alphabetically by name. Finally, we iterate through the filtered and sorted array to display the user information.

Question 2: Object-Oriented Programming in PHP

You're developing a content management system (CMS) in PHP, and you need to create a class to represent articles. Each article has properties such as title, author, and content. Additionally, you want to implement a method to display the full article in HTML format. Design the Article class with appropriate properties and methods.

Solution 2:

```php
?php
class Article {
    private $title;
    private $author;
    private $content;

    // Constructor to initialize properties
    public function __construct($title, $author, $content) {
        $this-title = $title;
        $this-author = $author;
        $this-content = $content;
    }

    // Method to display the full article in HTML format
    public function displayArticle() {
        $html = "div class='article'";
        $html .= "h2" . $this-title . "/h2";
        $html .= "pAuthor: " . $this-author . "/p";
        $html .= "div" . $this-content . "/div";
        $html .= "/div";
        return $html;
    }
}

// Example usage
$article = new Article("PHP Basics", "John Doe", "Lorem ipsum dolor sit amet...");
echo $article-displayArticle();
?
```

Explanation 2:

This solution defines an `Article` class with private properties for title, author, and content. The constructor initializes these properties when creating a new `Article` object. The `displayArticle()` method constructs and returns an HTML representation of the article using these properties.

Conclusion

Mastering PHP involves not just solving assignments, but understanding the underlying principles and applying them effectively. Through these advanced PHP questions and solutions, we hope to shed light on the intricacies of PHP programming. Remember, at ProgrammingHomeworkHelp.com, our expert PHP assignment helpers are always here to guide you on your journey to PHP proficiency. Stay curious, keep coding, and unlock the limitless possibilities of PHP!