(PHP 4 >= 4.2.0, PHP 5, PHP 7)
mb_split — Split multibyte string using regular expression
$pattern
   , string $string
   [, int $limit = -1
  ] ) : array
   Split a multibyte
   string using regular expression
   pattern and returns the result as an
   array.
  
patternThe regular expression pattern.
stringThe string being split.
limitlimit is specified, 
       it will be split in limit elements as
       maximum.
      
     
   The result as an array,  or FALSE on failure.
  
Note:
The character encoding specified by mb_regex_encoding() will be used as the character encoding for this function by default.