w3resource

PHP Exercises: Create a new string which is n copies of the the first 3 characters of a given string

PHP Basic Algorithm: Exercise-26 with Solution

Write a PHP program to create a new string which is n (non-negative integer) copies of the the first 3 characters of a given string. If the length of the given string is less than 3 then return n copies of the string.

Sample Solution:

PHP Code :

<?php
// Define a function that repeats the front part of a string $n times
function test($s, $n)
{
    // Initialize an empty string to store the result
    $result = "";

    // Define the number of characters from the front of the string to repeat
    $frontOfString = 3;

    // Adjust $frontOfString if it exceeds the length of the input string
    if ($frontOfString > strlen($s)) {
        $frontOfString = strlen($s);
    }

    // Extract the front part of the string
    $front = substr($s, 0, $frontOfString);

    // Concatenate the front part to the result $n times
    for ($i = 0; $i < $n; $i++) {
        $result = $result . $front;
    }

    // Return the final result
    return $result;
}

// Test the function with different inputs
echo test("Python", 2) . "\n";
echo test("Python", 3) . "\n";
echo test("JS", 3) . "\n";
?>

Sample Output:

PytPyt
PytPytPyt
JSJSJS

Visual Presentation:

PHP Basic Algorithm Exercises: Create a new string which is n copies of the the first 3 characters of a given string.

Flowchart:

Flowchart: Create a new string which is n copies of the the first 3 characters of a given string.

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a PHP program to create a new string which is n (non-negative integer) copies of a given string.
Next: Write a PHP program to count the string "aa" in a given string and assume "aaa" contains two "aa".

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.