strpos - and multiple needles?

[Tim Roberts]

Re: strpos - and multiple needles?

My Pet Programmer <anthony@mypetp rogrammer.comwr ote:

>
>preg_match('/^([a-zA-Z]\:)(\\[^\\/:*?<>"|]*(?<![
>]))*(\.[a-zA-Z]{2,6})$/', $filename);
>
>That one should only match valid filenames.

There are two things here I don't understand. First, I don't understand
what you are trying to do with (?<![ ]). (I assume there was a space in
there that caused the line to wrap.) As I read it, that says "fail if the
last character of the previous match was a space", but since the pattern
before it matches all the characters in the pattern after it, I don't see
how it could ever take effect.

Second, I don't get what you are trying to do with (\.[a-zA-Z]{2,6}). Is
that supposed to be matching an extension? That fails for "test.c".

Also, that requires a drive letter. Was that your intent?
--
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.

[Anthony Levensalor]

Re: strpos - and multiple needles?

Tim Roberts said:

My Pet Programmer <anthony@mypetp rogrammer.comwr ote:

>preg_match('/^([a-zA-Z]\:)(\\[^\\/:*?<>"|]*(?<![
>]))*(\.[a-zA-Z]{2,6})$/', $filename);
>>
>That one should only match valid filenames.

>
There are two things here I don't understand. First, I don't understand
what you are trying to do with (?<![ ]). (I assume there was a space in
there that caused the line to wrap.) As I read it, that says "fail if the
last character of the previous match was a space", but since the pattern
before it matches all the characters in the pattern after it, I don't see
how it could ever take effect.
>
Second, I don't get what you are trying to do with (\.[a-zA-Z]{2,6}). Is
that supposed to be matching an extension? That fails for "test.c".
>
Also, that requires a drive letter. Was that your intent?

Actually, I made a mistake in posting that, grabbed a regExp from a
completely different RegEx scheme. I thought you were looking for a
windows workaround, and I completely spaced it and gave you one of their
..NET ones. Sorry about that.

This one is the one I meant to hand off.
preg_match('![^A-Z0-9_\.]!i',$filename)

If it matches, then the filename is no good, ok otherwise
Test cases:

lib.so - Ok
tbl_status - Ok
my file is cool.txt NOT Ok
\ this- isn't value NOT Ok
text.c - Ok
foo - Ok
superlong_with_ underscores.png - Ok
ILikeTrucks!.jp g NOT Ok

REALLY sorry about the mix-up.

~A!

--
Anthony Levensalor
anthony@mypetpr ogrammer.com

Only two things are infinite, the universe and human stupidity,
and I'm not sure about the former. - Albert Einstein

[Jerry Stuckle]

Re: strpos - and multiple needles?

Anthony Levensalor wrote:

Tim Roberts said:

>My Pet Programmer <anthony@mypetp rogrammer.comwr ote:

>>preg_match( '/^([a-zA-Z]\:)(\\[^\\/:*?<>"|]*(?<![
>>]))*(\.[a-zA-Z]{2,6})$/', $filename);
>>>
>>That one should only match valid filenames.

>>
>There are two things here I don't understand. First, I don't understand
>what you are trying to do with (?<![ ]). (I assume there was a space in
>there that caused the line to wrap.) As I read it, that says "fail if
>the
>last character of the previous match was a space", but since the pattern
>before it matches all the characters in the pattern after it, I don't see
>how it could ever take effect.
>>
>Second, I don't get what you are trying to do with (\.[a-zA-Z]{2,6}). Is
>that supposed to be matching an extension? That fails for "test.c".
>>
>Also, that requires a drive letter. Was that your intent?

Actually, I made a mistake in posting that, grabbed a regExp from a
completely different RegEx scheme. I thought you were looking for a
windows workaround, and I completely spaced it and gave you one of their
.NET ones. Sorry about that.
>
This one is the one I meant to hand off.
preg_match('![^A-Z0-9_\.]!i',$filename)
>
If it matches, then the filename is no good, ok otherwise
Test cases:
>
lib.so - Ok
tbl_status - Ok
my file is cool.txt NOT Ok
\ this- isn't value NOT Ok
text.c - Ok
foo - Ok
superlong_with_ underscores.png - Ok
ILikeTrucks!.jp g NOT Ok
>
REALLY sorry about the mix-up.
>
~A!
>

A space is also valid in Windows.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[Tim Roberts]

Re: strpos - and multiple needles?

Anthony Levensalor <anthony@mypetp rogrammer.comwr ote:

>
>If it matches, then the filename is no good, ok otherwise
>Test cases:
>
>lib.so - Ok
>tbl_status - Ok
>my file is cool.txt NOT Ok
>\ this- isn't value NOT Ok
>text.c - Ok
>foo - Ok
>superlong_with _underscores.pn g - Ok
>ILikeTrucks!.j pg NOT Ok

I guess this depends on your definition of "no good". Both "my file is
cool.txt" and "ILikeTrucks!.j pg" are valid file names on both Windows and
Unix.
--
Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.