PHP Exercises: Check whether a given string starts with "F" or ends with "B"

Last update on December 20 2024 10:26:25 (UTC/GMT +8 hours)

Write a PHP program to check whether a given string starts with "F" or ends with "B". If the string starts with "F" return "Fizz" and return "Buzz" if it ends with "B" If the string starts with "F" and ends with "B" return "FizzBuzz". In other cases return the original string.

Sample Solution:

PHP Code :

<?php
// Define a function that checks the given string for specific conditions and returns corresponding values
function test($s)
{
    // Check if the first character is "F" AND the last character is "B"
    // If true, return "FizzBuzz"
    if ((substr($s, 0, 1) == "F") && (substr($s, strlen($s) - 1, 1) == "B")) {
        return "FizzBuzz";
    }
    // Check if the first character is "F"
    // If true, return "Fizz"
    else if (substr($s, 0, 1) == "F") {
        return "Fizz";
    }
    // Check if the last character is "B"
    // If true, return "Buzz"
    else if (substr($s, strlen($s) - 1, 1) == "B") {
        return "Buzz";
    }
    // If none of the conditions are met, return the original string
    else {
        return $s;
    }
}

// Test the function with different strings
echo test("FizzBuzz")."\n";
echo test("Fizz")."\n";
echo test("Buzz")."\n";
echo test("Founder")."\n";
?>

Explanation:

• Function Definition:
• The test function checks the input string $s to see if it meets certain conditions based on its first and last characters.
• Conditions Checked:
• First Condition: If the first character of $s is "F" and the last character is "B", it returns "FizzBuzz".
• Second Condition: If only the first character is "F", it returns "Fizz".
• Third Condition: If only the last character is "B", it returns "Buzz".
• Else: If none of the conditions are met, it returns the original string $s.

Output:

Fizz
Fizz
Buzz
Fizz

Visual Presentation:

Flowchart:

PHP Code Editor:

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