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PHP Exercises: Create a new string from two given string one is shorter and another is longer

PHP Basic Algorithm: Exercise-65 with Solution

Write a PHP program to create a new string from two given string one is shorter and another is longer. The format of the new string will be long string + short string + long string.

Sample Solution:

PHP Code :

<?php
function test($s1, $s2)
{ 
   return strlen($s1) < strlen($s2) ? $s2 . $s1 . $s2 : $s1 . $s2 . $s1;
}

echo test("Hello", "Hi")."\n";
echo test("JS", "Python")."\n";

Sample Output:

HelloHiHello
PythonJSPython

Flowchart:

Flowchart: Create a new string from two given string one is shorter and another is longer.

PHP Code Editor:

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Previous: Write a PHP program to create a new string without the first and last character of a given string of length atleast two.
Next: Write a PHP program to concat two given string of length atleast 1, after removing their first character.

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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