What is the difference between == and === in PHP?

=== checks value and data type, while == only checks value.

== checks both value and data type, === does not.

What is the use of array_keys() function?

Returns all the keys of an array

What is the purpose of isset() function?

Checks if a variable is set and not NULL

Checks the data type of a variable

What is the difference between print and echo?

print returns a value, echo does not.

echo returns a value, print does not.

print is used only for numbers.

How do you check if an array key exists?

array_key_exists("key", $array);

What is recursion in PHP?

A function inside another function

What does include do if the file is missing?

Issues a warning but continues execution

Throws an error and stops execution

Automatically creates the missing file

What is the difference between require and include?

require stops execution if the file is missing, include does not.

include stops execution, require does not.

require is used for functions only.

What is the use of the global keyword in PHP?

Allows access to global variables inside a function

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PHP Quiz

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Professional Development

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Practice Problem

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Nivya Bhagchandani

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50 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does PHP stand for?

Personal Home Page

Hypertext Preprocessor

Pre Hypertext Processor

Private Home Page

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which symbol is used to denote variables in PHP?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

PHP Quiz

50 questions

What does PHP stand for?

Which symbol is used to denote variables in PHP?

Which of the following is a valid way to start a PHP script?