Switch statement execution in PHP - Mini Project: Build & Apply

Switch statement execution

📖 Scenario: You are creating a simple program to display the day of the week based on a number input. This is like a small calendar helper that tells you the name of the day when you enter a number from 1 to 7.

🎯 Goal: Build a PHP program that uses a switch statement to print the correct day name for a given number.

📋 What You'll Learn

Create a variable called dayNumber with a value from 1 to 7

Create a variable called defaultDay with the value 'Invalid day'

Use a switch statement on dayNumber with cases for numbers 1 to 7

Print the day name corresponding to the number (1 = Monday, 2 = Tuesday, ..., 7 = Sunday)

Print defaultDay if the number is not between 1 and 7

💡 Why This Matters

🌍 Real World

Switch statements are useful when you want to choose between many options based on a single value, like menu choices or day names.

💼 Career

Understanding switch statements helps in writing clear and efficient code for decision-making in many programming jobs.

1

Create the day number variable

Create a variable called dayNumber and set it to 3.

PHP

<?php

// Create a variable called dayNumber and set it to 3
// Your code here

Need a hint?

Use $dayNumber = 3; to create the variable.

2

Create the default day variable

Create a variable called defaultDay and set it to the string 'Invalid day'.

PHP

<?php
$dayNumber = 3;

// Create a variable called defaultDay and set it to 'Invalid day'
// Your code here

Need a hint?

Use $defaultDay = 'Invalid day'; to create the variable.

3

Write the switch statement

Write a switch statement using $dayNumber to set a variable $dayName to the correct day name for numbers 1 to 7: 1 = Monday, 2 = Tuesday, 3 = Wednesday, 4 = Thursday, 5 = Friday, 6 = Saturday, 7 = Sunday. Use $defaultDay for any other number.

PHP

<?php
$dayNumber = 3;
$defaultDay = 'Invalid day';

// Use a switch statement on $dayNumber to set $dayName
// Your code here

Need a hint?

Use switch ($dayNumber) { case 1: ... break; ... default: ... } to assign $dayName.

4

Print the day name

Print the value of the variable $dayName.

PHP

<?php
$dayNumber = 3;
$defaultDay = 'Invalid day';

switch ($dayNumber) {
    case 1:
        $dayName = 'Monday';
        break;
    case 2:
        $dayName = 'Tuesday';
        break;
    case 3:
        $dayName = 'Wednesday';
        break;
    case 4:
        $dayName = 'Thursday';
        break;
    case 5:
        $dayName = 'Friday';
        break;
    case 6:
        $dayName = 'Saturday';
        break;
    case 7:
        $dayName = 'Sunday';
        break;
    default:
        $dayName = $defaultDay;
        break;
}

// Print the day name
// Your code here

Need a hint?

Use print($dayName); to show the day.