PHP Exercises: Create a new string of length 2, using first two characters of a given string

PHP Basic Algorithm: Exercise-75 with Solution

Write a PHP program to create a new string of length 2, using first two characters of a given string. If the given string length is less than 2 use '#' as missing characters.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that modifies the input string based on its length
function test($s1)
{ 
  // Check if the length of the string is greater than or equal to 2
  if (strlen($s1) >= 2)
     {
       // If true, extract the first two characters from the string
       $s1 = substr($s1, 0, 2);
      }
  // If the length is greater than 0 but less than 2
  else if (strlen($s1) > 0)
      {
       // Extract the first character and concatenate "#" to it
       $s1 = substr($s1, 0, 1) . "#";
      }
  // If the length is 0
  else
      {
       // Set the string to "##"
       $s1 = "##";
      }
   // Return the modified string
   return $s1;
}

// Test the 'test' function with different strings, then display the results using echo
echo test("Hello")."\n";
echo test("Python")."\n";
echo test("a")."\n";
echo test(" ")."\n";
?>

Sample Output:

He
Py
a#
 #

Flowchart:

PHP Code Editor:

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