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

Private Home Page Programming Hypertext Processor Preprocessed Hypertext Page Personal Home 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

output() echo write() printf()

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

Select one answer • 1 pt

$_GET $_POST $_SERVER $_REQUEST_URI

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

Select one answer • 1 pt

11 9 8 10

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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in_array("a", $arr) array_key_exists("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 false throws an error null

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?

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

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

Select one answer • 1 pt

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

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

Select one answer • 1 pt

$_POST $_SERVER $_GET $_FILES

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