| |
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| Viewing Topic: String check
for invalid
characters, Can
this code be
more e |
 Xecu |
|
Subject: "String check
for invalid
characters..."
Posted: @ 9:15 pm on Feb 27 2008 |
|
|
Member #: 599
Rank: user - (6)
Since: 02/27/08
Posts: 6
From: New York City
|
Hi guys, I am
very new to
php, and mySQL,
so please bare
with me.
I have created
a code from
some scrap
codes I found
on various
sites/ forums.
This is the
code, and it's
meant to check
passed strings
aka Username
and Password,
if there are
invalid
characters
being passed
from a form
after a Submit
button is
pressed.
Code:
$str =
$_POST['uname']
;
$str2 =
$_POST['pword']
;
$invalid_chars
=
".,/\`;[]-
*&^%$#@!~+(
)|{}<>?:
='";
for($a = 0; $a
<
strlen($str);
$a++) {
$char =
substr($str,
$a, 1);
if(strpos($inva
lid_chars,
$char) ===
false) {
error('Usernam
e error:
Username
contains
invalid
characters');
}
}
for($a = 0; $a
<
strlen($str2);
$a++) {
$char2
= substr($str2,
$a, 1);
if(strpos($inva
lid_chars,
$char2) ===
false) {
error('Passwor
d error:
Password
contains
invalid
characters');
}
}
Now the code
should work,
but it always
passes error.
Is there a
better way to
code an invalid
char check,
I've also tried
with an array,
but it had many
flaws, so I
decided to do
it like this.
Edited at 09:35:43 pm on 02/27/08
You see heaven,
before you see
hell. - Xecu |
Viewed: 9,919 Times |  |  |
| Xecu |
| Subject: "re: String
check for
invalid
charac..."
Posted: @ 10:15 pm on Feb 27 2008
|
|
|
Member #: 599
Rank: user - (6)
Since: 02/27/08
Posts: 6
From: New York City
|
Sorry to double
post, but I
solved the non
working part,
and I think
this is pretty
efficient.
Unless someone
can show me a
much better
way.
Code:
$str =
$_POST['uname
'];
$str2 =
$_POST['pword
'];
$valid_chars =
"12345678
90_abcdefghijkl
mnopqrstuvwxyzA
BCDEFGHIJKLMNOP
QRSTUVWXYZ&quo
t;;
for($a = 0; $a
<
strlen($str);
$a++) {
$char =
substr($str,
$a, 1);
if(strpos($vali
d_chars, $char)
=== false) {
error('Userna
me error:
Username
contains
invalid
characters');<
br />
}
}
for($a = 0; $a
<
strlen($str2);
$a++) {
$char2
= substr($str2,
$a, 1);
if(strpos($vali
d_chars,
$char2) ===
false) {
error('Passwo
rd error:
Password
contains
invalid
characters');<
br />
}
}
Hopefully this
helps new
people like
myself, with a
username and
password
invalid
character check
in their sign
up forms.
You see heaven,
before you see
hell. - Xecu |
|
Viewed: 9,907 Times | | |
| misterhaan |
| Subject: "re: String
check for
invalid
charac..."
Posted: @ 3:17 pm on Feb 28 2008
|
|
|
Member #: 5
Rank: Contributor - (214)
Since: 02/11/05
Posts: 149
From: chair
|
please note
that the above
post is likely
made up in its
entirety. |
|
Viewed: 9,889 Times | | |
| Xecu |
| Subject: "re: String
check for
invalid
charac..."
Posted: @ 5:49 pm on Feb 28 2008
|
|
|
Member #: 599
Rank: user - (6)
Since: 02/27/08
Posts: 6
From: New York City
|
Wow, see I are
noob to this
stuff, that
looks much more
efficient, and
hopefully after
I test it
faster as well.
Thanks again,
I'll let you
know how it
goes.
Edited at 05:52:26 pm on 02/28/08
You see heaven,
before you see
hell. - Xecu |
|
Viewed: 9,885 Times | | |
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