PHP Exercises: Create a new string using three copies of the last two character of a given string of length atleast two

PHP Basic Algorithm: Exercise-61 with Solution

Write a PHP program to create a new string using three copies of the last two character of a given string of length atleast two.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that repeats the last two characters of a string three times
function test($s1)
{
    // Use substr to extract the last two characters of s1
    $last2 = substr($s1, strlen($s1) - 2);
    
    // Concatenate the last2 string repeated three times
    return $last2 . $last2 . $last2;
}

// Test the 'test' function with different input strings and display the results
echo test("Hello")."\n";
echo test("Hi");
?>

Explanation:

• Function Purpose:
• The test function takes a string $s1 and returns a new string where the last two characters of $s1 are repeated three times.
• Extracting Last Two Characters:
• The function uses substr($s1, strlen($s1) - 2) to get the last two characters of $s1 and stores them in $last2.
• Repeating and Concatenating:
• It then creates a new string by concatenating $last2 three times ($last2 . $last2 . $last2), which repeats the last two characters three times.

Output:

lololo
HiHiHi

Flowchart:

PHP Code Editor:

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