Another way would be if ($vaidateStr == preg_replace("/[^a-z0-9\-]/i", "", $vaidateStr)) { /true, or valid... } the "i" after the last / makes it case insensitive. So it should match upper and lower alpha characters. > Ah yes, I also forgot the uppercase chars > > if ($vaidateStr == preg_replace("/[^a-zA-Z0-9\-]/", "", $vaidateStr)) { > /true, or valid... > } > > BTW also as Eric says, the carrot (^) inside the square brackets means > "anything but" (negation), thus how this works.. > > Ben > > On Wed, Jul 20, 2011 at 9:38 PM, Eric Cope > wrote: > > Here is the regular expression: > > /^[a-zA-Z0-9\-]+$/ > > the ^ requires the pattern match at the beginning of the string. > The + requires at least one of these characters, but no upper limit. > You can use * if you don't need the lower limit of 1. > $ requires the patten match all the way to the end of the string. > The dash requires escaping, hence the back slash. > > http://www.regular-expressions.info/anchors.html > > Thanks, > Eric > > On Wed, Jul 20, 2011 at 8:34 PM, keith smith > wrote: > > > Hi, > > I have an input string that should only be lower or upper > alphas, numbers and can contain a hyphen. > > I'm trying to figure out how to get PHP preg_match to verify the > input string only contains these chars. > > I tried some thing like this and it always returns true if I > have one or more of the specified chars, even if I have a char > that is not specified. > > I need a true for any string that contains Alphas and/or numbers > and/or one or more hyphens. I need it to return if the string > contains anything else. > > preg_match("/[a-z0-9\+\-]/", $vaidateStr) > > I do not need to use preg_match, I'm looking for a simple solution. > > Any pointers are much appreciated. > > ------------------------ > Keith Smith > > > --------------------------------------------------- > PLUG-discuss mailing list - > PLUG-discuss@lists.plug.phoenix.az.us > > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > > > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > > > > > -- > --- > Ben > > /print ''.join(map(lambda x: chr(x), ( (ord('a')-(3*5)), > int(math.sqrt(math.pi*76)*5+2), int(math.ceil(math.e)*28), > int(math.floor(math.e)*35), long(abs(4%3*35+3)*2))))/ > > > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss