Blog

Problem Statement:

Write a PHP function that checks if a given string is a palindrome.

Solution Explanation:

1. Convert the string to lowercase using strtolower().
2. Remove spaces using str_replace(" ", "", $str).
3. Reverse the string using strrev().
4. Compare the original and reversed strings.

PHP Code:

<?php
function isPalindrome($str) {
    $str = strtolower(str_replace(" ", "", $str)); // Convert to lowercase and remove spaces
    return $str === strrev($str); // Compare original with reversed
}

// Test cases
echo isPalindrome("madam") ? "True\n" : "False\n";  // Output: True
echo isPalindrome("racecar") ? "True\n" : "False\n";  // Output: True
echo isPalindrome("hello") ? "True\n" : "False\n";  // Output: False
echo isPalindrome("A man a plan a canal Panama") ? "True\n" : "False\n";  // Output: True
?>

Example Output: