PHP Exercises: Create a string like "aababcabcd" from a given string "abcd"

PHP Basic Algorithm: Exercise-30 with Solution

Write a PHP program to create a string like "aababcabcd" from a given string "abcd".

Sample Solution:

PHP Code :

<?php
// Define a function that generates a string by concatenating substrings from the input string
function test($s)
{
    // Initialize an empty string to store the result
    $result = "";

    // Iterate through the string
    for ($i = 0; $i < strlen($s); $i++) {
        // Append substrings from the beginning up to the current index
        $result .= substr($s, 0, $i + 1);
    }

    // Return the final result
    return $result;
}

// Test the function with different input strings
echo test("abcd")."\n";
echo test("abc")."\n";
echo test("a")."\n";
?>

Sample Output:

aababcabcd
aababc
a

Flowchart:

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a PHP program to create a new string made of every other character starting with the first from a given string.
Next: Write a PHP program to count a substring of length 2 appears in a given string and also as the last 2 characters of the string. Do not count the end substring.