PHP Basics

Core PHP understanding for real-world web dev.

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Beginner � ~6 min

Q1. What does PHP stand for (originally)?

Select one answer � 1 pt

Preprocessed Hypertext Page Personal Home Page Programming Hypertext Processor Private Home Page

Q2. Which symbol is used to start a variable in PHP?

Select one answer � 1 pt

# @ % $

Q3. Which function outputs text to the browser in PHP?

Select one answer � 1 pt

echo output() write() printf()

Q4. Which superglobal contains data sent by an HTML form using method="POST"?

Select one answer � 1 pt

$_GET $_POST $_REQUEST_URI $_SERVER

Q5. What will strlen("SmartAssess") return?

Select one answer � 1 pt

8 9 10 11

Q6. Which operator is used for concatenation in PHP?

Select one answer � 1 pt

. & :: +

Q7. Which statement properly checks if a key exists in an array?

Select one answer � 1 pt

array_has("a", $arr) in_array("a", $arr) key_in_array("a", $arr) array_key_exists("a", $arr)

Q8. What does isset($x) return when $x is null?

Select one answer � 1 pt

false null throws an error true

Q9. Which function would you use to safely escape output for HTML to prevent XSS?

Select one answer � 1 pt

urldecode() htmlentities_decode() strip_tags() htmlspecialchars()

Q10. In PHP, what does PDO primarily provide?

Select one answer � 1 pt

A CLI-only routing system A CSS framework A database access layer (with prepared statements) A templating engine for HTML

Q11. Which is the correct way to start a PHP session?

Select one answer � 1 pt

init_session(); session_start(); session_begin(); start_session();

Q12. Which superglobal is commonly used for data submitted via POST?

Select one answer � 1 pt

$_POST $_GET $_SERVER $_FILES

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