=== PHP MOTIVATION TEST ===
Total Questions: 10
Instructions: Answer all questions to the best of your ability.

Question 1 (1 points):
Which of the following is the correct way to start a PHP script?
A) <php>
B) <?php
C) <script language="php">
D) <%php%>

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Question 2 (2 points):
What will be the output of the following code?

Code:
<?php
$x = "5";
$y = 3;
echo $x + $y;
?>
A) 53
B) 8
C) Error
D) 5 + 3

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Question 3 (1 points):
Which function is used to count the number of elements in an array?
A) length()
B) size()
C) count()
D) sizeof()

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Question 4 (3 points):
Complete the function to return the factorial of a number:

Code:
function factorial($n) {
    if ($n <= 1) {
        return 1;
    }
    return $n * _________;
}

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Question 5 (1 points):
Which keyword is used to create a class in PHP?
A) create
B) class
C) object
D) define

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Question 6 (2 points):
What will happen when this code runs?

Code:
<?php
try {
    throw new Exception("Test error");
} catch (Exception $e) {
    echo "Caught: " . $e->getMessage();
}
echo " - Done";
?>
A) Fatal error
B) Caught: Test error - Done
C) Test error
D) Nothing will be displayed

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Question 7 (2 points):
Which is the modern recommended way to connect to MySQL in PHP?
A) mysql_connect()
B) mysqli or PDO
C) db_connect()
D) sql_connect()

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Question 8 (3 points):
Which function should be used to prevent SQL injection?
A) mysql_escape_string()
B) addslashes()
C) Prepared statements
D) strip_tags()

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Question 9 (3 points):
What design pattern is demonstrated in this code?

Code:
class Database {
    private static $instance = null;
    
    private function __construct() {}
    
    public static function getInstance() {
        if (self::$instance === null) {
            self::$instance = new Database();
        }
        return self::$instance;
    }
}
A) Factory Pattern
B) Singleton Pattern
C) Observer Pattern
D) Strategy Pattern

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Question 10 (5 points):
Write a PHP function to check if a string is a palindrome (ignoring case and spaces)

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=== ANSWER KEY ===
Q1: B (1 points)
Q2: B (2 points)
Q3: C (1 points)
Q4: factorial($n - 1) (3 points)
Q5: B (1 points)
Q6: B (2 points)
Q7: B (2 points)
Q8: C (3 points)
Q9: B (3 points)
Q10: See sample solution below (5 points)

=== SAMPLE SOLUTIONS ===
Question 4 - Complete Factorial Function:
Answer: factorial($n - 1)
Complete function:
function factorial($n) {
    if ($n <= 1) {
        return 1;
    }
    return $n * factorial($n - 1);
}

Question 10 - Palindrome Function:
function isPalindrome($str) {
    // Remove spaces and convert to lowercase
    $clean = strtolower(str_replace(' ', '', $str));
    // Compare with reverse
    return $clean === strrev($clean);
}

Alternative palindrome solution:
function isPalindrome($str) {
    $clean = strtolower(preg_replace('/[^a-zA-Z0-9]/', '', $str));
    $len = strlen($clean);
    for ($i = 0; $i < $len / 2; $i++) {
        if ($clean[$i] !== $clean[$len - 1 - $i]) {
            return false;
        }
    }
    return true;
}

=== SCORING EXAMPLE ===
Sample Score: 18 points
Analysis: Good! You have solid PHP fundamentals with room for advanced concepts.

Recommendations:
- Study design patterns and advanced OOP concepts
- Focus on security best practices
- Practice algorithm and problem-solving skills
- Build practical projects to apply your knowledge
- Contribute to open-source PHP projects