<?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);
 
	if ($letter1 != $letter2) {
		$palindrome = false;
		$i = $halfLenght++;
		}
	else  {
		$palindrome = true;
		$a++;
		$b--;
	}
}
if ($palindrome == true) {
	echo "Это Полиндром";
}
else {
	echo "Это не полиндром";
}
 
 var_dump($halfLenght);
 var_dump($letter1);
var_dump($palindrome);
 

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