PHP Exercises: Check whether two given integers are in the range 40..50 inclusive
PHP Basic Algorithm: Exercise-20 with Solution
Write a PHP program to check whether two given integers are in the range 40..50 inclusive, or they are both in the range 50..60 inclusive.
Sample Solution:
PHP Code :
<?php
function test($x, $y)
{
return ($x >= 40 && $x <= 50 && $y >= 40 && $y <= 50) || ($x >= 50 && $x <= 60 && $y >= 50 && $y <= 60);
}
var_dump(test(78, 95));
var_dump(test(25, 35));
var_dump(test(40, 50));
var_dump(test(55, 60));
Sample Output:
bool(false) bool(false) bool(true) bool(true)
Flowchart:
PHP Code Editor:
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Previous: Write a PHP program to check which number nearest to the value 100 among two given integers. Return 0 if the two numbers are equal.
Next: Write a PHP program to find the larger value from two positive integer values that is in the range 20..30 inclusive, or return 0 if neither is in that range.
What is the difficulty level of this exercise?
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($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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