I need some help with regulars...
how can I check if $var contains only "----" (minus) no metter how many??
Thanx...
point
how can I check if $var contains only "----" (minus) no metter how many??
Thanx...
point
-
-
Re: regular expression help..
On Thu, 28 Aug 2003 15:50:49 +0200
"point" <point@caanNOSP AMproduction.co m> wrote:
[color=blue]
> I need some help with regulars...
>
> how can I check if $var contains only "----" (minus) no metter how
> many??
>
> Thanx...
>
> point[/color]
Don't cross post, it's considered bad form.
/^-+$/
Begining of the line (^), followed by minus (-) one or more times (+)
followed by end of line ($)
There are some very good online tutorial for regexs; try here
Matt
--
Quispiam Power Computing | "There are two major products that come out
Pendle Hill, Australia | of Berkeley: LSD and UNIX. We don't believe
+61 2 9631 7719 | this to be a coincidence. "
www.quispiam.com | - Jeremy S. Anderson
-
Re: regular expression help..
On Thu, 28 Aug 2003 15:50:49 +0200 in
<message-id:bil19u01kqn@ enews1.newsguy. com>
"point" <point@caanNOSP AMproduction.co m> wrote:
[color=blue]
> I need some help with regulars...
>
> how can I check if $var contains only "----" (minus) no metter how
> many??
>
> Thanx...
>
> point
>
>[/color]
if (preg_match('/^([-]+)$/', $var)) {
echo "All's good\n";
} else {
echo "Oops.. illegal chars!\n";
}
HTH =)
Regards,
Ian
--
Ian.H [Design & Development]
digiServ Network - Web solutions
www.digiserv.net | irc.digiserv.ne t | forum.digiserv. net
Programming, Web design, development & hosting.
Comment
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Re: regular expression help..
On Thu, 28 Aug 2003 14:48:25 GMT, "Ian.H [dS]" <ian@WINDOZEdig iserv.net> wrote:
[color=blue]
>preg_match('/^([-]+)$/', $var)[/color]
Just a tip - don't capture unless you actually want to use the subexpressions,
and there's no point having a character class of a single character.
/^-+$/ is enough here.
--
Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)
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Re: regular expression help..
On Thu, 28 Aug 2003 16:27:42 +0100 in
<message-id:2n7skvkk5rop m0gp5l25vsiqblr n8qebs3@4ax.com >
Andy Hassall <andy@andyh.co. uk> wrote:
[color=blue]
> On Thu, 28 Aug 2003 14:48:25 GMT, "Ian.H [dS]"
> <ian@WINDOZEdig iserv.net> wrote:
>[color=green]
> >preg_match('/^([-]+)$/', $var)[/color]
>
> Just a tip - don't capture unless you actually want to use the
> subexpressions,
> and there's no point having a character class of a single character.
>
> /^-+$/ is enough here.[/color]
Thanks Andy.. after I replied and re-synced the groups.. I noticed the
reply without the match / group chars.. I guess it's one of those things
where "I used it before.. it works..." and I haven't really got around
to try and improve it.
Good tip and noted.. especially as I use lots of regex for various
projects =)
Regards,
Ian
--
Ian.H [Design & Development]
digiServ Network - Web solutions
www.digiserv.net | irc.digiserv.ne t | forum.digiserv. net
Programming, Web design, development & hosting.
Comment
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Re: regular expression help..
point wrote:[color=blue]
>
> I need some help with regulars...
>
> how can I check if $var contains only "----" (minus) no metter how many??[/color]
Just as a point of interest, I compared the following 3 regular expressions:
/^-+$/, /[^-]/, /^([-]+)$/
I was going to suggest !preg_match("/[^-]/",$val), then realized it wouldn't
return false on an empty string, but I threw it in anyway. The code I used
follows the comparions. In just about ever case /^-+/ won. No surprised there,
just thought I find out how much different they are. I reordered the regex
array 3 times to make sure the array position wasn't biasing the results.
------
/^-+$/ AVG: 4.4089375120221 E-05 seconds (363 sampled)
/[^-]/ AVG: 4.4289953219965 E-05 seconds (322 sampled)
/^([-]+)$/ AVG: 4.4381050836472 E-05 seconds (315 sampled)
-----------------------------------------3--
/^-+$/ AVG: 4.7261700218106 E-05 seconds (324 sampled)
/[^-]/ AVG: 5.3900497155554 E-05 seconds (353 sampled)
/^([-]+)$/ AVG: 5.3713196202328 E-05 seconds (323 sampled)
--233333333333333 33333-------
/^-+$/ AVG: 4.3738299402697 E-05 seconds (290 sampled)
/[^-]/ AVG: 4.3901622804821 E-05 seconds (351 sampled)
/^([-]+)$/ AVG: 4.5026909342051 E-05 seconds (359 sampled)
--3------------------------------------------
/^-+$/ AVG: 4.3636065157915 E-05 seconds (349 sampled)
/[^-]/ AVG: 4.4002504405861 E-05 seconds (334 sampled)
/^([-]+)$/ AVG: 4.4881733434057 E-05 seconds (317 sampled)
TESTINGTESTINGT ESTING
/^-+$/ AVG: 4.2770132922486 E-05 seconds (298 sampled)
/[^-]/ AVG: 4.4013239057577 E-05 seconds (367 sampled)
/^([-]+)$/ AVG: 4.2876200889474 E-05 seconds (335 sampled)
REORDER ARRAY
------
/^([-]+)$/ AVG: 4.5152124530541 E-05 seconds (334 sampled)
/^-+$/ AVG: 4.4505271685899 E-05 seconds (338 sampled)
/[^-]/ AVG: 4.5173778766539 E-05 seconds (328 sampled)
-----------------------------------------3--
/^([-]+)$/ AVG: 5.4088808734965 E-05 seconds (322 sampled)
/^-+$/ AVG: 4.7325738364301 E-05 seconds (341 sampled)
/[^-]/ AVG: 5.387234051079E-05 seconds (337 sampled)
--233333333333333 33333-------
/^([-]+)$/ AVG: 4.4645499606867 E-05 seconds (331 sampled)
/^-+$/ AVG: 4.3906505752659 E-05 seconds (318 sampled)
/[^-]/ AVG: 4.4383894004713 E-05 seconds (351 sampled)
--3------------------------------------------
/^([-]+)$/ AVG: 4.4498060430799 E-05 seconds (336 sampled)
/^-+$/ AVG: 4.3501577726225 E-05 seconds (328 sampled)
/[^-]/ AVG: 4.3935364200955 E-05 seconds (336 sampled)
TESTINGTESTINGT ESTING
/^([-]+)$/ AVG: 4.281405290943E-05 seconds (326 sampled)
/^-+$/ AVG: 4.2799590290457 E-05 seconds (345 sampled)
/[^-]/ AVG: 4.3385659307694 E-05 seconds (329 sampled)
REORDER ARRAY
------
/[^-]/ AVG: 4.403849682176E-05 seconds (332 sampled)
/^([-]+)$/ AVG: 4.4901682613106 E-05 seconds (329 sampled)
/^-+$/ AVG: 4.3864447107006 E-05 seconds (339 sampled)
-----------------------------------------3--
/[^-]/ AVG: 5.405314904047E-05 seconds (339 sampled)
/^([-]+)$/ AVG: 5.3905426187718 E-05 seconds (329 sampled)
/^-+$/ AVG: 4.7486948679729 E-05 seconds (332 sampled)
--233333333333333 33333-------
/[^-]/ AVG: 4.3712762685922 E-05 seconds (325 sampled)
/^([-]+)$/ AVG: 4.420560948989E-05 seconds (323 sampled)
/^-+$/ AVG: 4.3457881970839 E-05 seconds (352 sampled)
--3------------------------------------------
/[^-]/ AVG: 4.452014041889E-05 seconds (329 sampled)
/^([-]+)$/ AVG: 4.4954001013912 E-05 seconds (335 sampled)
/^-+$/ AVG: 4.4005612532298 E-05 seconds (336 sampled)
TESTINGTESTINGT ESTING
/[^-]/ AVG: 4.2576365675663 E-05 seconds (326 sampled)
/^([-]+)$/ AVG: 4.18363008818E-05 seconds (329 sampled)
/^-+$/ AVG: 4.1880469391311 E-05 seconds (345 sampled)
---------------- START CODE
<plaintext>
<?php
$str = array("------", "-----------------------------------------3--",
"--233333333333333 33333-------",
"--3------------------------------------------", "TESTINGTESTING TESTING");
function getmicrotime(){
list($usec, $sec) = explode(" ",microtime ());
return ((float)$usec + (float)$sec);
}
foreach($str as $strsample) {
$res = array(array("/[^-]/",0,0), array("/^([-]+)$/",0,0), array("/^-+$/",0,0));
for($i=0;$i<100 0;++$i) {
$rnd = rand(0,2);
$time_start = getmicrotime();
preg_match($res[$rnd][0], $strsample);
$time_end = getmicrotime();
$res[$rnd][1]++;
$res[$rnd][2] += ($time_end - $time_start);
}
echo "\n\n ".$strsample."\ n\n";
foreach($res as $val) {
echo " ".$val[0];
for($i=strlen($ val[0]);$i<10;++$i) {
echo " ";
}
echo("\tAVG: ".($val[2] / $val[1])." seconds (".$val[1]." sampled)\n");
}
}
?>
---------------- END CODE
Shawn
--
Shawn Wilson
shawn@glassgian t.com
Comment
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Re: regular expression help..
Shawn Wilson wrote:
[color=blue]
> Just as a point of interest, I compared the following 3 regular expressions:[/color]
<snip>
Wow. I reread my post and am embarrassed by the number of spelling and grammar
mistakes. In case anyone is wondering, English is my first language.
Shawn
--
Shawn Wilson
shawn@glassgian t.com
Comment
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Re: regular expression help..
I forgott to say: Thanx guys :)))
"point" <point@caanNOSP AMproduction.co m> wrote in message
news:bil19u01kq n@enews1.newsgu y.com...[color=blue]
> I need some help with regulars...
>
> how can I check if $var contains only "----" (minus) no metter how many??
>
> Thanx...
>
> point
>
>[/color]
Comment
Comment