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PHP Exercises: Check three given integers and return true if one of them is 20 or more less than one of the others

PHP Basic Algorithm: Exercise-50 with Solution

Write a PHP program to check three given integers and return true if one of them is 20 or more less than one of the others.

Sample Solution:

PHP Code :

<?php
function test($x, $y, $z)
{
    return abs($x - $y) >= 20 || abs($x - $z) >= 20 ||
                  abs($y - $z) >= 20;
}

var_dump(test(11, 21, 31))."\n";
var_dump(test(11, 22, 31))."\n";
var_dump(test(10, 20, 15))."\n";

Sample Output:

bool(true)
bool(true)
bool(false)

Pictorial Presentation:

PHP Basic Algorithm Exercises: Check three given integers and return true if one of them is 20 or more less than one of the others.

Flowchart:

Flowchart: Check three given integers and return true if one of them is 20 or more less than one of the others

PHP Code Editor:

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Previous: Write a PHP program to check if two or more non-negative given integers have the same rightmost digit.
Next: Write a PHP program to find the larger from two given integers. However if the two integers have the same remainder when divided by 7, then the return the smaller integer. If the two integers are the same, return 0.

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