PHP Exercises: Move the first two characters to the end of a given string of length at least two

PHP Basic Algorithm: Exercise-67 with Solution

Write a PHP program to move the first two characters to the end of a given string of length at least two.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that rearranges the characters of a string
function test($s1)
{ 
    // Use substr to extract substrings and rearrange them
    return substr($s1, 2, strlen($s1) - 2) . substr($s1, 0, 2);
}

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

Explanation:

• Function Definition:
• The function test is defined to take one string parameter, $s1.
• Character Rearrangement:
• Inside the function, two substr calls are used to rearrange the characters of the input string $s1:
• substr($s1, 2, strlen($s1) - 2) extracts a substring starting from the third character to the end of the string.
• substr($s1, 0, 2) extracts the first two characters of the string.
• Concatenation:
• The function returns the concatenation of the two extracted substrings, effectively moving the first two characters to the end of the string.

Output:

lloHe
JS

Flowchart:

PHP Code Editor:

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