<?php

error_reporting(-1);
mb_internal_encoding('utf-8');

$text = "A roza upala na lapu Azora";
$result = "palindrome";

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

$length = mb_strlen($text) - 1;
$halfLength = floor($length / 2);

for ($i = 0; $i <= $halfLength; $i++) {
    if (mb_substr($text, $i, 1) != mb_substr($text, $length - $i, 1)) {
        $result = "not palindrome";       
        break; 
    }
}

echo "{$result}\n";