php regex for string containing a "." and "-"

Hay all, i need help making a regex. Th开发者_JS百科e string must contain a "-" and must not contain a ".".

Can someone help me please.

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You don't need a regex for that:

if (strpos($string, '-') !== false && strpos($string, '.') === false)
    //do what you want...

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Don't know about php, but this should do it:

^[^.]*-[^.]*$

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no need regex for this, one method is to use strpos

strpos($mystr,"-" ) !== FALSE && strpos($mystr,"." ) === FALSE