Beginner ~6 min

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

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

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

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$ % # @

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

Select one answer • 1 pt

printf() echo output() write()

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

Select one answer • 1 pt

$_GET $_SERVER $_POST $_REQUEST_URI

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

Select one answer • 1 pt

11 8 10 9

Q6. Which operator is used for concatenation in PHP?

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. & :: +

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

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

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

Select one answer • 1 pt

true throws an error false null

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

Select one answer • 1 pt

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

Q10. In PHP, what does PDO primarily provide?

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

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

Select one answer • 1 pt

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

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

Select one answer • 1 pt

$_FILES $_POST $_SERVER $_GET

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