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- <?
- $string = "race car";
- $num = "111";
- function palindrome($string) {
- $a = strtolower(preg_replace("/[^A-Za-z0-9]/","",$string));
- return ($a==strrev($a))? "YES" : "NO";
- }
- echo palindrome($string);
- echo palindrome($num);
- ?>
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