<?php
error_reporting(-1);
mb_internal_encoding('utf-8');

$test = "А роза упала на лапу Азора";
$result = "палиндром";

$test = mb_strtolower($test);
$test = str_replace(" ","",$test);

$length = mb_strlen($test);
$halfLength = floor($length/2);
$palindrom = true;
for ($i = 0; $i <= $halfLength; $i++) {
	if (mb_substr($test, $i, 1) !== mb_substr($test, -($i+1), 1)) {
		$palindrom = false;
	}
}

if ($palindrom === false) {
	echo 'hui';
} else {
	echo $result;
}
?>