PHP Exercises: Check if three given numbers are in strict increasing order
PHP Basic Algorithm: Exercise-48 with Solution
Write a PHP program to check if three given numbers are in strict increasing order, such as 4 7 15, or 45, 56, 67, but not 4 ,5, 8 or 6, 6, 8.However,if a fourth parameter is true, equality is allowed, such as 6, 6, 8 or 7, 7, 7.
Sample Solution:
PHP Code :
<?php
function test($x, $y, $z, $flag)
{
return $flag ? $x <= $y && $y <= $z : $x < $y && $y < $z;
}
var_dump(test(1, 2, 3, false))."\n";
var_dump(test(1, 2, 3, true))."\n";
var_dump(test(10, 2, 30, false))."\n";
var_dump(test(10, 10, 30, true))."\n";
Sample Output:
bool(true) bool(true) bool(false) bool(true)
Pictorial Presentation:
Flowchart:
PHP Code Editor:
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Previous: Write a PHP program to check if it is possible to add two integers to get the third integer from three given integers.
Next: Write a PHP program to check if two or more non-negative given integers have the same rightmost digit.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($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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