Re: Is there a special character I here? (Regular Expressions)

I am starting on php, coming from Perl. One thing I really like on the way we can use regex in Perl is the shorthand: \w --> [a-zA_Z0-9_] \W --> [^a-zA_Z0-9_] \d --> [0-9] \D --> [^0-9] \s --> white space characters ... Is this shorthand handled in php? Thanks, Guilherme On 8/16/01 5:17 PM, in article Pine.BSF.4.10.10108170003580.9813-100000@localhost, "Philip Olson" <philip@cornado.com> wrote: > It's probably a good idea to learn a bit about regular > expressions. > > In short, PHP gives us two types of regular expressions > to play with, POSIX and PCRE. For more information : > > PCRE : http://php.net/manual/en/ref.pcre.php > POSIX : http://php.net/manual/en/ref.regex.php > > The following is an example rich tutorial : > > http://www.phpbuilder.org/columns/dario19990616.php3 > > It uses ereg, which is POSIX : > > ereg() : http://php.net/manual/en/function.ereg.php > > Your question is "How can I make sure a string contains > ONLY alpha-numeric characters?" That could look like : > > $string = 'examPle123'; > > if (eregi("^[a-z0-9]+$",$string)) { > > echo 'String is alpha-numeric'; > } else { > echo 'String is NOT alpha-numeric'; > } > > Which in english says : > > if the string : > - begins with // ^ > - contains one to an unlimited number of // + > - ends with // $ > the following characters : > a-z // all lowercase letters > A-Z // comes from i in eregi (case insensitive) > 0-9 // all numbers > then this is TRUE. > > Let's say we wanted to make sure the length was between > 3-11 characters, tinkering with the regex the following > works : > > if (eregi("^[a-z0-9]{3,11}$",$string)) { > > echo 'Is alpha-numeric and 3-11 characters in length'; > } else { > echo 'Is NOT alpha-numeric and/or 3-11 characters in length'; > } > > Allowing spaces in $string is easy as : [a-z0-9 ] > > Also, some good variable and string functions exist : > > variables : http://php.net/manual/en/ref.var.php > strings : http://php.net/manual/en/ref.strings.php > > Regards, > Philip Olson > > > On Thu, 16 Aug 2001, Brandon Orther wrote: > >> Hello, >> >> I am looking for a way to check a string if it has anything other than >> Numbers or Letters. Does anyone know how to do this? >> Thank you, >> >> -------------------------------------------- >> Brandon Orther >> WebIntellects Design/Development Manager >> brandon@webintellects.com >> 800-994-6364 >> www.webintellects.com >> -------------------------------------------- >> >> >