Can someone tell me what the syntax for a regex would be that would only allow the following characters:
- a-z (lower case only)
- 0-9
- period, dash, underscore
Additionally the string must start with only a lower case letter (a-z) and cannot contain any spaces or other characters than listed above.
Thank you in advance for the help,
Justin
You can do:
"^[a-z][-a-z0-9\._]*$"Here is the breakdown
^beginning of line[a-z]character class for lower values, to match the first letter[-a-z0-9\._]character class for the rest of the required value*zero or more for the last class$end of String