PHP Exercises: 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
PHP Basic Algorithm: Exercise-52 with Solution
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.
Sample Solution:
PHP Code :
<?php
function test($x, $y)
{
return $x / 10 == $y / 10 || $x / 10 == $y % 10 || $x % 10 == $y / 10 || $x % 10 == $y % 10;
}
var_dump(test(11, 21))."\n";
var_dump(test(11, 20))."\n";
var_dump(test(10, 10))."\n";
Sample Output:
bool(true) bool(false) bool(true)
Flowchart:
PHP Code Editor:
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Previous: Write a PHP program to find the larger from two given integers. However if the two integers have the same remainder when divided by 7, then the return the smaller integer. If the two integers are the same, return 0.
Next: Write a PHP program to compute the sum of two given non-negative integers x and y as long as the sum has the same number of digits as x. If the sum has more digits than x then return x without y.
What is the difficulty level of this exercise?
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($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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