PHP Exercises: Find the larger from two given integers

Last update on May 30 2022 11:41:48 (UTC/GMT +8 hours)

PHP Basic Algorithm: Exercise-51 with Solution

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.

Sample Solution:

PHP Code :

<?php
function test($x, $y)
{
    if ($x == $y)
            {
                return 0;
            }
            else if (($x % 7 == $y % 7 && $x < $y) || $x > $y)
            {
                return $x;
            }
            else
            {
                return $y;
            }
}

echo test(11, 21)."\n";
echo test(11, 20)."\n";
echo test(10, 10)."\n";

Sample Output:

21
20
0

Flowchart:

PHP Code Editor:

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Previous: 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.
Next: Write a PHP program to check two given integers, each in the range 10..99. Return true if a digit appears in both numbers, such as the 3 in 13 and 33.

What is the difficulty level of this exercise?

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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