Question

How to shift each letter in a string N places up in the alphabet with PHP

Answer 1

function shiftEachLetterNPlacesUp($str, $N) {
    $result = "";
    
    foreach (str_split($str) as $ch) {
        $asciiCode = (int)$ch + $N;
        if (($asciiCode >= 97 && $asciiCode <= 122) || ($asciiCode >= 65 && $asciiCode <= 90)) {
            $result .= chr($asciiCode);
        } else {
            $result .= $ch;
        }
    }
    
    return $result;
}

echo shiftEachLetterNPlacesUp("8a Fkq", 3);




/*
run:

8a Fkq

*/

 

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