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"
<[EMAIL PROTECTED]> 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
>> [EMAIL PROTECTED]
>> 800-994-6364
>> www.webintellects.com
>> --------------------------------------------
>>
>>
>
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