Dear ddrudik ,
Thanks for your kindly advise in advance !
To be honest , There are thousands of different patterns need to be stored in database,If I write functions,there are so many, so I must validate them by regular expression .
But I don't do well in regex , I need your great help , thannks ...
BTW, how to compare with one of a digit string ? such as 01234A6789 , compare with A , if (A > 5) ...this expression is valid ...