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I have a regex for file name validation. Here it is:
/^[0-9a-zA-Z\^\&\'\@\{\}\[\]\,\$\=\!\-\#\(\)\.\%\+\~\_; ]+$/
How do I change it to check for file name not to start with . symbol. Thanks for help.
A negative lookahead will be the easiest solution:
Alternatively, you can match the first character with an extra character class:
Btw, inside a character class nearly all special characters loose their function and will not need to be escaped.