How to get custom tamil letter?

We can put style for custom tamil letter by doing this method:

Main functionality:

preg_match_all('/pLpM*|./u', $getUyireluthuword, $split_letter உதாரணம்: அ);

Here
$getUyireluthu denotes word or a tamil paragraph.
$split_letter denotes custom tamil letter

$tam=0;
foreach($split_letter[0] as $str) {
++$tam;
if($tam==1)
echo "$str";
else
echo $str;
}?>

In the above example .....
$str is the specified letter(for getting and applying style)

Purpose:

*Very useful to search a specified characters in other language
*Easily identify group or single characters by their pronunciation