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File extension -- a period and then only letters and numbers


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Old May 18th, 2009, 10:53 PM
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File extension -- a period and then only letters and numbers
Hello, I am trying to validate a file extension with regex.

This is what I have
Code:
"^.\w\w*$"


But the problem is if you type two or more letters/numbers with no period it will match. Its suppsoed to have the period in front :/
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Old May 19th, 2009, 12:29 AM
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Like how \w matches a letter, number, or underscore, a . matches any character. It's a "metacharacter".

If you want to use its literal meaning then stick a backslash in front.
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Old May 19th, 2009, 01:09 AM
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oh cool thanks
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