RE: [PHP] substr?

Good day. Of course it will always return true... look at your logic. I believe you meant for each test to be an equality test, not an inequality test. ============================ Darren Gamble Planner, Regional Services Shaw Cablesystems GP 630 - 3rd Avenue SW Calgary, Alberta, Canada T2P 4L4 (403) 781-4948 > -----Original Message----- > From: Chris Knipe [mailto:savage@savage.za.org] > Sent: Monday, June 17, 2002 12:30 PM > To: php-general@lists.php.net > Subject: Re: [PHP] substr? > > > Thanks, > > I don't know *what* I was thinking.... The if statement still > returns false > though... > > // Validate cell if we have one. > if (!$_POST['NumC'] == "") { > if ((substr($_POST['NumC'], 0, 3) != "082") OR > (substr($_POST['NumC'], > 0, 3) != "072") OR > (substr($_POST['NumC'], 0, 3) != "083") OR > (substr($_POST['NumC'], > 0, 3) != "073") OR > (substr($_POST['NumC'], 0, 3) != "084")) { > > Any number passes. For example, if I have 123 as the first > three chars, it > passes... I fail to see how it manages this?? > > > > ----- Original Message ----- > From: "Lazor, Ed" <ELazor@providence.org> > To: "'Chris Knipe'" <savage@savage.za.org>; > <php-general@lists.php.net> > Sent: Monday, June 17, 2002 7:24 PM > Subject: RE: [PHP] substr? > > > > > > > > > -----Original Message----- > > > Is this right? It seems to me that substr is working in reverse? > > > > Reverse... that's what the -7 specifies. > > > > substr($string, 0, -7) > > > > is > > > > 123 > > > > You could also do > > > > substr($string, 0, 3) > > > > to get the same thing. > > > > > > > > > > $string = "1234567890"; // Always numerical, always 10 chars. > > > if (!substr($string, 0, -7) == "083") { > > > echo "not 083\n"; > > > } else { > > > // Exists here. > > > echo "is 083\n"; > > > } > > > > > > Due to the reverse if, shouldn't it exit not 083? I'd just like > > > to get some clarity on this, allot of my work depends on > > > validating these > > > numbers *correctly*.... Basically, I want to see if the > first three > > > characters is 072, 073, 082, 083, or 084. If not, the > $string must be > > > discarded. > > > > > > I've also tried if(substr($string, 0, -7) != "083"), but that > > > also doesn't > > > work.... ereg(*) also doesn't seem to be able to search for > > > patterns only on > > > the beginning of a string, so even if I wanted to use a ereg > > > expression, I'd > > > have to cut the first 3 chars from the string with substr first? > > > > > > How can / should I validate these numbers? > > > > > > > > > > > > > > > > > > -- > > > PHP General Mailing List (http://www.php.net/) > > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > > ************************************************************** > ************** > > This message is intended for the sole use of the individual > and entity to > > whom it is addressed, and may contain information that is > privileged, > > confidential and exempt from disclosure under applicable > law. If you are > > not the intended addressee, nor authorized to receive for > the intended > > addressee, you are hereby notified that you may not use, > copy, disclose or > > distribute to anyone the message or any information contained in the > > message. If you have received this message in error, > please immediately > > advise the sender by reply email and delete the message. > Thank you very > > much. > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php >