calculate the maximum length of palindrome by given any array of names or string

<?php
   function PalindromeLengthPuzzle($input1)
    {
$polin_array =array();
foreach ($input1 as $key => $value) {
  $res[]= substr($value,0,1);
}
print_r($res);
for($c=0;$c<=1000;$c++):
shuffle($res);

$result= implode('',$res);

if($result==strrev($result)){
 $polin_array[]=$result;   
}

endfor;
$polin_array=array_unique($polin_array);
print_r($polin_array);

foreach ($polin_array as $key => $value) {
    $val =strlen($value);
}
echo $val;
}

echo PalindromeLengthPuzzle(array('Bharti', 'Bharat','Brijesh','Bhavna','Anjit','Chand','Aushil'));
?>