PHP Exercises: Check if the number of 3's is greater than the number of 5's
PHP Basic Algorithm: Exercise-113 with Solution
Write a PHP program to check if the number of 3's is greater than the number of 5's.
Sample Solution:
PHP Code :
<?php
function test($nums)
{
$no_3 = 0;
$no_5 = 0;
for ($i = 0; $i < sizeof($nums); $i++)
{
if ($nums[$i] == 3) $no_3++;
if ($nums[$i] == 5) $no_5++;
}
return $no_3 > $no_5;
}
var_dump(test([1, 5, 6, 9, 3, 3]));
var_dump(test([1, 5, 5, 5, 10, 17]));
var_dump(test([1, 3, 3, 5, 5, 5]));
Sample Output:
bool(true) bool(false) bool(false)
Flowchart:
PHP Code Editor:
Contribute your code and comments through Disqus.
Previous: Write a PHP program to check if the sum of all 5' in the array exactly 15 in a given array of integers.
Next: Write a PHP program to check if a given array of integers contains a 3 or a 5.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($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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