使用preg_split在“，”和“和”上拆分字符串

I now split the sting op , only like this:

$a_string = preg_split('/[,]/', $sting);

I also want to split the sting on " and " but i can't find the right regex.

preg_split('/(?:,| and )/', $sting);

You can also just do:

$arr = preg_split('/,| and /', $str);

as | (alteration) has a very low precedence and binds last.