PHP Exercises: Create a new string without the first and last character of a given string of any length

Last update on December 20 2024 10:26:37 (UTC/GMT +8 hours)

Write a PHP program to create a new string without the first and last character of a given string of any length.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that extracts the middle portion of a string, excluding the first and last characters
function test($s1)
{ 
    // Check if the string has less than 2 characters and return an empty string if true
    return strlen($s1) < 2 ? "" : substr($s1, 1, strlen($s1) - 2);
}

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

Explanation:

Function Definition:

A function named test is defined, which takes one parameter, $s1, representing the input string.

Length Check:

The function checks if the length of the string $s1 is less than 2:

If true (the string has 0 or 1 character), it returns an empty string "".
If false (the string has 2 or more characters), it proceeds to the next step.

Substring Extraction:

If the string length is sufficient, it uses the substr function to extract the middle portion of the string:

substr($s1, 1, strlen($s1) - 2):

This extracts a substring starting from the second character (index 1) up to the second-to-last character.
The length of the extracted substring is calculated as strlen($s1) - 2, effectively removing the first and last characters from the original string.

Output:

ell

Flowchart:

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a PHP program to move the last two characters to the start of a given string of length at least two.
Next: Write a PHP program to create a new string using the two middle characters of a given string of even length (at least 2).