<?php
error_reporting(-1);
mb_internal_encoding('utf-8');
//проверка на палиндром
 
$text = "123454321";
$text = mb_strtolower($text);
$text = str_replace(' ', '', $text);
 
$length = floor(mb_strlen($text)/2);
 
$answer = 'палиндром';
 
for ($i=0; $i<$length; $i++) {
	$s = mb_substr($text, $i, 1);
	$f = mb_substr($text, -$i-1, 1);
	echo "$s - $f\n";
	if ($s != $f) {
		$answer = 'непалиндром';
	}
}
 
echo $answer;

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