Question

How to check whether a string is a palindrome, ignoring spaces and case in PHP

Answer 1

function isPalindrome($str) {
    // Normalize the string: remove spaces and convert to lowercase
    $normalizedStr = preg_replace('/\s+/', '', strtolower($str));

    // Reverse the normalized string and compare
    $reversedStr = strrev($normalizedStr);

    return $normalizedStr === $reversedStr;
}

echo "Is palindrome: " . (isPalindrome("A man a plan a canal Panama") ? "true" : "false") . "\n";
echo "Is palindrome: " . (isPalindrome("abcDefg") ? "true" : "false") . "\n";


/*
run:

Is palindrome: true
Is palindrome: false

*/

 

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