Split string into into array of character pairs [duplicate]

Question

Possible Duplicate:
PHP preg_split string into letter pairs

I have an string looking like this:

$str = "How are you doing?";

How can I turn this string into an array looking like this:

$arr = array("Ho","w ","ar","r ","yo","u ","do","in","g?");

Answer 1

$array = str_split($str, 2);

Documentation.

Answer 2

Use str_split() function.

Answer 3

Take a look at str_split(); it allows you to split a string by a definable amount of characters, so your code would look like:

$arr = str_split($str, 2);

Which will split $str into an array $arr where each element contains two characters,