<code><?php
$pattern = '/[;,]/';
$string = "something here ; and there, oh,that's all!";
echo '<pre>', print_r( preg_split( $pattern, $string ), 1 ), '
';
Обновленный ответ на обновленный вопрос:
<code><?php
$pattern = '/[\x{ff0c},]/u';
//$string = "something here ; and there, oh,that's all!";
$string = 'hei,nihao,a ';
echo '<pre>', print_r( preg_split( $pattern, $string ), 1 ), '
';