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 Private Home Page Programming Hypertext Processor Personal 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

$_SERVER $_REQUEST_URI $_POST $_GET

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

Select one answer � 1 pt

8 10 9 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

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

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

Select one answer � 1 pt

true null throws an error false

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

Select one answer � 1 pt

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

Q10. In PHP, what does PDO primarily provide?

Select one answer � 1 pt

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

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

Select one answer � 1 pt

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

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

Select one answer � 1 pt

$_GET $_SERVER $_FILES $_POST

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