Regular Expression to check the user input pattern

Question

My users enter some numbers in a textbox. The numbers format is 09XXXXXXXXX. The numbers are separated by Comma. like 09121234567,09351234568. I use the Regular Expression below to check the user input.

^(09\d{9},?)+

Everything is ok but the problem is that if I enter 0912123456709351234568 it still matches this regexp. I want the user to enter at least one number without comma but if the numbers are more than one then it should be separated by comma. What is the right regexp?

Answer 1

Try this pattern below,

^(09\d{9})(,09\d{9})*$