How does PHP divide alphanumeric and Chinese characters in a string

How does PHP divide the alphanumeric characters in a string into Chinese?
such as: $str = "How does PHP divide 322 of the alphanumeric SF f45d and Chinese in the string?" "; Divide by numbers or letters. Get array:

$new = Array ();

$new [0]= "PHP";
$new [1]= "How to put the string in";
$new [2]= "322";
$new [3]= ' alphanumeric ";
$new [4]= "SF";
$new [5]= "";
$new [6]= "f45d";
$new [7]=] and Chinese _ split? ";

------Solution--------------------
Just look at the manual.

PHP Code

$str = "How does PHP divide 322 alphanumeric asf f45d and Chinese _ in a string?" "; $arr = Preg_split ("/([a-za-z0-9]+)/", $str, 0, Preg_split_no_empty | Preg_split_delim_capture);  
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