Question

How to move the n word to the end of a string in PHP

Answer 1

function moveNthWordToEndOfString(string $input, int $n): string
{
    if (trim($input) === '') {
        return $input;
    }

    // Split on whitespace, remove empty pieces
    $parts = preg_split('/\s+/', $input, -1, PREG_SPLIT_NO_EMPTY);

    if ($n < 0 || $n >= count($parts)) {
        throw new OutOfRangeException("Index $n is out of range.");
    }

    $word = $parts[$n];
    unset($parts[$n]);

    // Reindex array to avoid gaps
    $parts = array_values($parts);

    $parts[] = $word;

    return implode(' ', $parts);
}

$s = "Would you like to know more? (Explore and learn)";
$n = 2;

$result = moveNthWordToEndOfString($s, $n);

echo $result . PHP_EOL;



/*
run:

Would you to know more? (Explore and learn) like

*/

 

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