Why conditional flow is needed in PHP - See It in Action

Why conditional flow is needed

📖 Scenario: Imagine you are creating a simple program that decides what message to show based on the time of day. This is like how a smart assistant might greet you differently in the morning, afternoon, or evening.

🎯 Goal: You will build a PHP program that uses conditional flow to check the time of day and print the correct greeting message.

📋 What You'll Learn

Create a variable to hold the current hour as a number

Create a variable to hold the greeting message

Use conditional statements to set the greeting based on the hour

Print the greeting message

💡 Why This Matters

🌍 Real World

Programs often need to respond differently depending on conditions, like showing different messages or performing different tasks.

💼 Career

Understanding conditional flow is essential for any programming job because it allows software to behave smartly and adapt to user input or data.

1

Set the current hour

Create a variable called $hour and set it to the number 14 to represent the current hour in 24-hour format.

PHP

# Your code here

Need a hint?

Use $hour = 14; to set the hour.

2

Create a greeting variable

Create a variable called $greeting and set it to an empty string "".

PHP

<?php
$hour = 14;
# Your code here

Need a hint?

Use $greeting = ""; to create an empty string variable.

3

Use conditional flow to set greeting

Use if, elseif, and else statements to set $greeting to "Good morning" if $hour is less than 12, "Good afternoon" if $hour is between 12 and 17 (inclusive), and "Good evening" otherwise.

PHP

<?php
$hour = 14;
$greeting = "";
# Your code here

Need a hint?

Use if, elseif, and else to check the hour and assign the greeting.

4

Print the greeting message

Use echo to print the value of $greeting.

PHP

<?php
$hour = 14;
$greeting = "";
if ($hour < 12) {
    $greeting = "Good morning";
} elseif ($hour <= 17) {
    $greeting = "Good afternoon";
} else {
    $greeting = "Good evening";
}
# Your code here

Need a hint?

Use echo $greeting; to show the greeting.