Why variables are needed in PHP - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable in PHP.

PHP

<?php
$[1] = 10;
echo $number;
?>

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

Anumber

B10

Cecho

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number as a variable name

Forgetting the dollar sign before the variable name

Using reserved words like 'var' as variable names

In PHP, variables start with a dollar sign followed by the variable name. Here, $number is the variable name.

2fill in blank

medium

Complete the code to output the value of the variable.

PHP

<?php
$age = 25;
echo [1];
?>

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

Aecho

B$25

C$age

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the dollar sign when echoing the variable

Trying to echo the variable name as a string without the dollar sign

To output the value of a variable in PHP, you use echo followed by the variable name with a dollar sign.

3fill in blank

hard

Fix the error in the code by completing the variable assignment.

PHP

<?php
$[1] = 'Hello World';
echo $greeting;
?>

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

Aworld

Bmessage

CHello

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in assignment and output

Forgetting the dollar sign in variable names

The variable name used in the assignment must match the one used in echo. Here, $greeting is correct.

4fill in blank

hard

Fill both blanks to create and output a variable holding a string.

PHP

<?php
$[1] = [2];
echo $name;
?>

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

Aname

B"John"

CJohn

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around string values

Using a variable name that doesn't match the echo statement

The variable $name is assigned the string value "John". Strings must be in quotes in PHP.

5fill in blank

hard

Fill all three blanks to declare, assign, and output a variable with a number.

PHP

<?php
$[1] = [2];
echo $[3];
?>

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

Ascore

B100

Dpoints

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in assignment and echo

Putting quotes around numbers

The variable $score is assigned the number 100 and then output with echo. The variable name must be consistent.