Palindrome number in php

Palindrome number in php

function checkPalindrome($inputString) {
  echo $inputString[0] == $inputString[(strlen($inputString) - 1)] ? 'Its palindrom' : 'Its not';
}
checkPalindrome(abbab);


second way:
function checkPalindrome($inputString) {
$str = $inputString;
    $rev = 0;
    
  while($str > 0){
      $output = $str % 10;
      $rev = ($rev * 10)+$output;
      $str = $str/10;
    
      
  }
    if($str == $rev){
        echo "this is palindrome "  .$inputString;
    }
    else{
        echo "this is not palindrome";
    }
    
  }
checkPalindrome(abbab);