<?php

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

$text = "А роза упала на лапу Азора";
$result = "Палиндром";
$negative = "не палиндром";
$text = mb_strtolower($text);
$text = str_replace(" ", "", $text);
$length = floor (mb_strlen($text) / 2);

for ($i = 1; $i <= $length; $i++){
	$letter1 = mb_substr($text, $i-1, 1);
	$letter2 = mb_substr($text, -$i, 1);
	if ($letter1 != $letter2) {
 	echo "$letter1 - $letter2\n$negative";
 	break;
    }	
    elseif ($i == $length){
	echo "$result";
	} else {
	echo "$letter1 - $letter2\n";
	}
}