<?php
mb_internal_encoding('utf-8');
$result="Это палиндром";
$badresult="Это непалиндром";
$text="А роза упала на лапу Азора";
$text=str_replace(" ","",$text);
$text=mb_strtolower($text);
$length=mb_strlen($text);
$halflength=floor($length/2);
 
 
 
for($i=0;$i<=$halflength;$i++){
 
	 $lastElement = $length-1;
	$lastElement=$lastElement-$i;
	$firstElement=$i;
	$a=mb_substr($text, $firstElement, 1);
	$b=mb_substr($text, $lastElement, 1);
	if($a!=$b){
		echo $badresult;
		break;
	}
	else{
		$count++;
	}
if ($count==$halflength){
		echo $result;
		}
 
 
}
?>
 

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