<?php
 
error_reporting(-1);
mb_internal_encoding('utf-8');
 
$text = "А роза упала на лапу Азора";
$result = "палиндром";
 
$text = str_replace(" ","",$text);
$text = mb_strtolower($text);
 
$length = mb_strlen($text);
$halfLength = floor($length/2);
 
for ($i = 0; $i <= $halfLength; $i++){
	if(mb_substr($text, $i, 1) != mb_substr($text, -$i-1, 1)){
		$result = "не палиндром";
	}
}
 
echo "Результат: {$result}\n";

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