Why output functions matter in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the message to the screen.

PHP

<?php
[1]("Hello, world!");
?>

Drag options to blanks, or click blank then click option'

Aecho

Bvar_dump

Cprint_r

Dprintf

Attempts:

3 left

💡 Hint

Common Mistakes

Using var_dump which shows extra information.

Using print_r which is for arrays and objects.

The echo statement outputs the string directly to the screen.

2fill in blank

medium

Complete the code to output the variable content.

PHP

<?php
$message = "Welcome!";
[1]($message);
?>

Drag options to blanks, or click blank then click option'

Aprint

Becho

Cvar_dump

Dprintf

Attempts:

3 left

💡 Hint

Common Mistakes

Using var_dump which adds type info.

Using printf without format specifiers.

echo outputs the value of the variable as plain text.

3fill in blank

hard

Fix the error in the code to correctly output the number.

PHP

<?php
$number = 10;
[1]("Number: $number");
?>

Drag options to blanks, or click blank then click option'

Aprint_r

Bprintf

Cvar_dump

Decho

Attempts:

3 left

💡 Hint

Common Mistakes

Using print_r which is for arrays and objects.

Using var_dump which outputs extra info.

echo correctly outputs the string with the variable inside.

4fill in blank

hard

Fill both blanks to output the formatted string with a number.

PHP

<?php
$score = 95;
[1]("Your score is %d.", [2]);
?>

Drag options to blanks, or click blank then click option'

Aprintf

B$score

C10

Decho

Attempts:

3 left

💡 Hint

Common Mistakes

Using echo with format specifiers which doesn't work.

Passing a wrong variable or value.

printf formats the string with the number passed as the second argument.

5fill in blank

hard

Fill the blanks to output the array content in a readable way.

PHP

<?php
$fruits = ['apple', 'banana', 'cherry'];
[1]([2]);
?>

Drag options to blanks, or click blank then click option'

Aprint_r

B$fruits

Cvar_dump

Decho

Attempts:

3 left

💡 Hint

Common Mistakes

Using echo which cannot print arrays.

Using var_dump which outputs extra type information.

print_r outputs arrays in a readable format.