PHP Exercises: Find the larger value from two positive integer values that is in the range 20..30 inclusive

Last update on May 30 2022 11:40:57 (UTC/GMT +8 hours)

PHP Basic Algorithm: Exercise-21 with Solution

Write a PHP program to find the larger value from two positive integer values that is in the range 20..30 inclusive, or return 0 if neither is in that range.

Sample Solution:

PHP Code :

<?php
function test($x, $y) 
{
   if ($x >= 20 && $x <= 30 && $y >= 20 && $y <= 30)
            {
                if ($x >= $y)
                {
                    return $x;
                }
                else
                {
                    return $y;
                }
            }
            else if ($x >= 20 && $y <= 30)
            {
                return $x;
            }
            else if ($y >= 20 && $y <= 30)
            {
                return $y;
            }
            else
            {
                return 0;
            }
     }


echo test(78, 95)."\n";
echo test(20, 30)."\n";
echo test(21, 25)."\n";
echo test(28, 28)."\n";

Sample Output:

Pictorial Presentation:

PHP Basic Algorithm Exercises: Find the larger value from two positive integer values that is in the range 20..30 inclusive.

Flowchart:

PHP Code Editor:

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Previous: Write a PHP program to check which number nearest to the value 100 among two given integers. Return 0 if the two numbers are equal.
Next: Write a PHP program to check if a given string contains between 2 and 4 'z' character.

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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