Echo statement in PHP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the echo statement do in PHP?

The echo statement outputs one or more strings to the web page or console. It is used to display text or variables.

beginner

How do you output the text Hello, World! using echo in PHP?

Use echo "Hello, World!"; to print the text on the screen.

intermediate

Can echo output multiple strings separated by commas? Give an example.

Yes, echo can output multiple strings separated by commas. Example: echo "Hello", " ", "World!"; outputs Hello World!.

intermediate

Is echo a function or a language construct in PHP?

echo is a language construct, not a function. This means you can use it without parentheses.

beginner

What happens if you forget the semicolon ; after an echo statement?

PHP will show a syntax error because semicolons mark the end of statements. Always end echo with a semicolon.

Which of the following is the correct way to output text using echo in PHP?

A print("Hello World!")

B echo "Hello World!";

C echo(Hello World!);

D print Hello World!;

echo "Hello World!"; is correct syntax. Option A uses print but misses semicolon. Option C has missing quotes. Option D is invalid syntax.

What will this code output? <br>echo "PHP", " is fun!";

A PHP is fun!

B PHP,is fun!

C PHP is fun!;

D Error

Using commas in echo outputs the strings one after another without extra characters.

Is it necessary to use parentheses with echo?

A Yes, always

B No, never

C Optional, but usually not used

D Only when outputting variables

echo is a language construct, so parentheses are optional but usually omitted.

What type of error occurs if you forget the semicolon after echo?

A Syntax error

B Runtime error

C Logical error

D No error

Forgetting the semicolon causes a syntax error because PHP expects statements to end with semicolons.

Which of these is NOT a valid way to use echo?

A echo "Hello";

B echo("Hello");

C echo "Hello", " World!";

D echo Hello;

Option D is invalid because strings must be in quotes.

Explain how the echo statement works in PHP and how to use it to display text.

Think about how you tell PHP to show words on the screen.

Describe the difference between using commas and concatenation with echo to output multiple strings.

Consider how you join words together or list them separately.