devknob Posted July 27, 2007 Share Posted July 27, 2007 after countless searches im down to this preg_match("[abcdefghijklmnopqrstuvwxyz0123456789_-]", $variable I dont care about anything, other than the only characters allowed are the ones listed above a-z, 0-9, - or _ no spaces, no @. Can someone please post a response and explain what im doing wrong here Quote Link to comment Share on other sites More sharing options...
Wildbug Posted July 27, 2007 Share Posted July 27, 2007 You can use ranges.... but you need to use anchors if you want the preg_match to fail if other characters are present. Also you're not using delimiters (technically you are, but.... not what you mean). preg_match('/^[\w\d-]+$/',$var); \w = A-Za-z_ \d = 0-9 - = - ^ = beginning of string $ = end of string + = one or more (it'll fail on an empty string) Quote Link to comment Share on other sites More sharing options...
Wildbug Posted July 27, 2007 Share Posted July 27, 2007 Oh, you don't need the "\d" at all because "\w" matches "A-Za-z0-9_". Sorry, slipped. Quote Link to comment Share on other sites More sharing options...
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