<?php
 
error_reporting(-1);
mb_internal_encoding('utf-8');
 
$text = "Аргентина манит негра";
$lowText = mb_strtolower($text);
$a = 0;
$b = -1;
$noSpace = str_replace(" ", "", $lowText);
$countText = mb_strlen($noSpace);
$halfLenght = floor($countText / 2);
for ($i = 0; $i <= $halfLength; $i++) {
 
	$letter1 = mb_substr($noSpace, $a, 1);
	$letter2 = mb_substr($noSpace, $b, 1);
	$a++;
	$b--;
	if ($letter1 != $letter2) {
		$palindrome = false;
		break;
		}
	else {
		$palindrome = true;		
	}
}
if ($palindrome = true) {
	echo "Это  Полиндром";
}
else {
	echo "Это не полиндром";
}

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