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

Last update on April 16 2025 12:52:19 (UTC/GMT +8 hours)

65. Concat Shorter into Longer

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
// Define a function named 'test' that concatenates strings based on their lengths
function test($s1, $s2)
{ 
    // Use a ternary operator to determine the order of concatenation
    return strlen($s1) < strlen($s2) ? $s2 . $s1 . $s2 : $s1 . $s2 . $s1;
}

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

Explanation:

Function Definition:

The function test takes two string parameters, $s1 and $s2.

Concatenation Based on Length:

The function uses a ternary operator to concatenate the strings in different orders based on their lengths:

If the length of $s1 is less than $s2, it returns $s2 . $s1 . $s2 (places $s1 between two instances of $s2).
Otherwise, it returns $s1 . $s2 . $s1 (places $s2 between two instances of $s1).

Output:

HelloHiHello
PythonJSPython

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to combine two strings by sandwiching the shorter string between two copies of the longer string.
Write a PHP function to determine the lengths of two strings and concatenate them in a long-short-long order.
Write a PHP program to compare string lengths and format a new string as long + short + long, ensuring proper case preservation.
Write a PHP script to analyze two inputs and output a composite string following the pattern: longer string, then shorter, then longer again.

PHP Code Editor:

Contribute your code and comments through Disqus.

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.