PHP Exercises: Check the largest number among three given integers
PHP Basic Algorithm: Exercise-18 with Solution
Write a PHP program to check the largest number among three given integers.
Sample Solution:
PHP Code :
<?php
function test($x, $y, $z)
{
$max = max($x, max($y, $z));
return $max;
}
echo test(1, 2, 3)."\n";
echo test(1, 3, 2)."\n";
echo test(1, 1, 1)."\n";
echo test(1, 2, 2)."\n";
Sample Output:
3 3 1 2
Pictorial Presentation:
Flowchart:
PHP Code Editor:
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Previous: Write a PHP program to check if a string 'yt' appears at index 1 in a given string. If it appears return a string without 'yt' otherwise return the original string.
Next: Write a PHP program to check which number nearest to the value 100 among two given integers. Return 0 if the two numbers are equal.
What is the difficulty level of this exercise?
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($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
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