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Re: CTYPE THREAD RESOLVED [message #182688 is a reply to message #182681] Wed, 28 August 2013 12:49 Go to previous messageGo to previous message
bill is currently offline  bill
Messages: 310
Registered: October 2010
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Senior Member
On 2013-08-26 3:19 PM, The Natural Philosopher wrote:
> On 26/08/13 19:07, Fiver wrote:
>> On 2013-08-25 21:35, Twayne wrote:
>>> If anyone is interested, here's the code I ended up with. It still
>>> needs to validate alphabetic & numeric array positions but that should
>>> be reasonably simple to add by checking the array positions for alpha or
>>> digit characters.
>>>
>>> Thanks for all the help!
....

>>> }
>>> IF(strlen($zip) === 7) {
>>> echo "Zip appears to be Canadian . <br />";
>>> }
>>> // ================== NOW LOOK TO SEE IF IT'S ALPHA-NUMERIC
>>>
>>> // ================ LET'S ASSIGN IT TO AN ARRAY
>>> echo ' <pre>';
>>> print_r(str_split($zip,1));
>>> echo '</pre>';
>>>
>>> // ================= check space is where it belongs
>>> if($zip[3] === " ") {
>>> echo "<br />Space in correct place<br />";
>>> }
>>>
>>> $sUser = $zip;
>>> $aValid = array(' ');
>>> if(!ctype_alnum(str_replace($aValid, '', $sUser))) {
>>> echo "Username has a problem";
>>> echo 'Your Postal Code is NOT properly formatted.';
>>> }
>>> else {
>>> echo "Postal code is properly formatted as ALPHA NUMERIC with ONE SPACE
>>> as the 4th character";
>>> }
>> For the US zip codes:
>>
>> is_numeric() is not the correct function to use here. "+.1e1" and
>> "0xCAB" are both numeric strings and would pass as US zip codes.
>> Better solution:
>>
>> if (strlen($zip) == 5 && ctype_digit($zip)) {
>> echo "looks like a US zip code\n";
>> }
>>
>> Better yet: check for known bad zip codes as well
>>
>> ... && $zip != "00000" && $zip != "99999" && I don't know, some more
>>
>> For the Canadian zip codes:
>>
>> Your code has a comment "let's assign it to an array", and you also
>> wrote that you still needed to validate the array positions, but you
>> never do create an array (except for the unnecessary one in $aValid,
>> which should probably be a string).
>>
>> Anyway, you're right that you still need to check the characters to the
>> right and left of the space, or strings like "x " and " 3 "
>> would be seen as valid zip codes. Here's one way to do it:
>>
>> if (strlen($zip) == 7
>> && $zip[3] == " "
>> && ctype_alpha($zip[0] . $zip[2] . $zip[5])
>> && ctype_digit($zip[1] . $zip[4] . $zip[6]))
>> {
>> echo "looks like a Canadian zip code\n";
>> }
>>
>> Note the two closing parens after $zip[6] ;)
>>
>>
>> regards,
>> 5er
>>
>>
>> PS: No regexes were killed or injured in the production of this message.
>>
>
> Now key in SW1A 1AA as a postcode and see what it does with it.
>
> there is a world beyond north America.
>

I hear ya; Things will only get checked if len=7 and that's 8, so ... .
It's finally coming together for me I think.

Thanks,

Twayne`

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