Incidentally it supports quite a bit more. Even the less powerful Perl Compatible Regular Expressions (PCRE), which are used by PHP, can also easily handle cont

Incidentally it supports quite a bit more. Even the less powerful Perl Compatible Regular Expressions (PCRE), which are used by PHP, can also easily handle context sensitive grammars (type 1): http://stackoverflow.com/questions/7434272/match-an-bn-cn-e-g-aaabbbccc-using-regular-expressions-pcre http://stackoverflow.com/questions/7434272/match-an-bn-cn-e-...