Why allow both constructor and static create() access?

[NinoSkopac]

You could make the constructor private or protected in next major version release, or simply remove the static method and just use constructor (no need for a factory method in such a simple class)

[rkrx]

The original idea for having an instance of this class was, that the compile-step is only done once. So if the pattern in reused a lot, there is a little less overhead to each pattern-match.
If you don't need a reusable matcher, you might be better of using a simple regular expression using preg_match.