<?php
 
error_reporting(-1);
mb_check_encoding('utf-8');
header("Content-Type: text/plain; charset=utf-8");
 
$text = 'А муза рада музе без ума да разума';
 
$text = mb_strtoupper($text);
$text = str_replace(" ", "", $text);
$length = mb_strlen($text);
$halfLenght = floor($length / 2);
 
for ($i = 1; $i <= $halfLenght; $i ++) {
    $firstSymbol = mb_substr($text, $i - 1, 1);
    $lastSymbol = mb_substr($text, $length - $i, 1);
    if (($firstSymbol == $lastSymbol) and ( $i == $halfLenght)) {
        echo "Текст является палиндромом. \n";
    } elseif ($firstSymbol != $lastSymbol) {
        echo "Текст не является палиндромом. \n";
        break;
    }
}

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