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

PHP Basic Algorithm: Exercise-45 with Solution

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
function test($s)
{
    if ((substr($s,0,1)=="F") && (substr($s,strlen($s)-1,1) =="B"))
            {
                return "FizzBuzz";
            }
            else if (substr($s,0,1) == "F")
            {
                return "Fizz";
            }
            else if (substr($s,strlen($s)-1,1) =="B")
            {
                return "Buzz";
            }
            else
            {
                return $s;
            }
}

echo test("FizzBuzz")."\n";
echo test("Fizz")."\n";
echo test("Buzz")."\n";
echo test("Founder")."\n";

Sample Output:

Fizz
Fizz
Buzz
Fizz

Pictorial Presentation:

PHP Basic Algorithm Exercises: Check whether a given string starts with 'F' or ends with 'B'.

Flowchart:

Flowchart: Check whether a given string starts with 'F' or ends with 'B'.

PHP Code Editor:

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Previous: Write a PHP program to compute the sum of the two given integers. If one of the given integer value is in the range 10..20 inclusive return 18.
Next: Write a PHP program to check if it is possible to add two integers to get the third integer from three given integers.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC