i realize a solution using strspn/strcspn was offered, but you asked for
eregi :)
anyway, i use ereg, but i think this should work
eregi("^[a-z0-9_\-]+$",$string)
notice that i had to escape the dash with a backslash
the plus sign forces atleast one character. you can use {x,y} in place of
the plus to force atleast x characters but no more than y characters.
mike
on 10/1/01 4:53 PM, Tim Ballantine at [EMAIL PROTECTED] wrote:
> Thankyou...
>
> I should have made it clearer that I did want to use only the legal
> characters to compare the string by.
>
> Tim
>
> "Rasmus Lerdorf" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>> Well, either you need to know the valid chars or the invalid ones. Make
>> up your mind and use strspn() or strcspn() appropriately.
>>
>> -Rasmus
>>
>> On Mon, 1 Oct 2001, Tim Ballantine wrote:
>>
>>> "Returns the length of the initial segment of str1 which does not
> contain
>>> any of the characters in str2."
>>>
>>> I realise that i could see if this matches with the length of the entire
>>> word, and is there a way to get it to compare the word by the legal
>>> characters, because the amount of illegal symbols, including different
>>> language symbols (french for example) will be too high for me to list.
>>>
>>> Tim
>>>
>>> "Rasmus Lerdorf" <[EMAIL PROTECTED]> wrote in message
>>> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>>>> Huh? You better read that documentation page again. You only need to
>>>> list the illegal symbols. And what do you mean by length?
>>>>
>>>> -Rasmus
>>>>
>>>> On Mon, 1 Oct 2001, Tim Ballantine wrote:
>>>>
>>>>> Is there anything which doesnt use length? And something like eregi,
>>> because
>>>>> it would be infeasible to list all of the symbols that a user could
> use,
>>> to
>>>>> compare a string by.
>>>>>
>>>>> Tim
>>>>>
>>>>> "Rasmus Lerdorf" <[EMAIL PROTECTED]> wrote in message
>>>>> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>>>>>> See php.net/strcspn
>>>>>>
>>>>>> On Mon, 1 Oct 2001, Tim Ballantine wrote:
>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> Could anyone tell me how to eregi a word, to see if it only
> contains
>>>>> either
>>>>>>> numbers, letters, the "_" and the "-", so that any other symbol
> with
>>>>> call it
>>>>>>> invalid. For example, theres the word "expressio_n" that will be
>>> valid,
>>>>> but
>>>>>>> the word "express%^$-n" will be invalid.
>>>>>>>
>>>>>>> Thankyou,
>>>>>>>
>>>>>>> Tim
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
-- mike cullerton
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