Google's Did You Mean in PHP

Hello,

I am trying to add artificial intelligence (Google's Did You Mean) in my php/ mysql search. For this purpose I am using following code

<?PHP
$search = $_POST['search'];

  $result = mysql_query("Select * From dictionary Where 1 = '1'");

if(mysql_num_rows($result)) 

{

While ($row = mysql_fetch_object($result))

{
similar_text(strtoupper($search), strtoupper($row->words),
$similarity_pst);

if(number_format($similarity_pst, 0) > 70)

{

echo $row->words;

}
}
}
?>

PHP:

The code works very fine. But I am trying to use Max() function instead of
> 70 to get only one entry of which value is highest. for this my code looks something like this

similar_text(strtoupper($search), strtoupper($row->words),
$similarity_pst);

$percent = $similarity_pst;

if (Max($percent))

{

echo $row->words;

}

PHP:

But this doesn't work. Any help please?

Thanks

 

plz.....store max...value in some variable than try.....got it???