regular expression help..

On Thu, 28 Aug 2003 15:50:49 +0200 "point" <point@caanNOSPAMproduction.com> wrote: > I need some help with regulars... > > how can I check if $var contains only "----" (minus) no metter how > many?? > > Thanx... > > point Don't cross post, it's considered bad form. /^-+$/ 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 http://sitescooper.org/tao_regexps.html 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

On Thu, 28 Aug 2003 15:50:49 +0200 in <message-id:bil19u01kqn@enews1.newsguy.com> "point" <point@caanNOSPAMproduction.com> wrote: > I need some help with regulars... > > how can I check if $var contains only "----" (minus) no metter how > many?? > > Thanx... > > point > > if (preg_match('/^([-]+)$/', $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.net | forum.digiserv.net Programming, Web design, development & hosting.

On Thu, 28 Aug 2003 14:48:25 GMT, "Ian.H [dS]" <ian@WINDOZEdigiserv.net> wrote: >preg_match('/^([-]+)$/', $var) Just a tip - don't capture unless you actually want to use the subexpressions, and there's no point having a character class of a single character. /^-+$/ 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)

On Thu, 28 Aug 2003 16:27:42 +0100 in <message-id:2n7skvkk5ropm0gp5l25vsiqblrn8qebs3@4ax.com> Andy Hassall <andy@andyh.co.uk> wrote: > On Thu, 28 Aug 2003 14:48:25 GMT, "Ian.H [dS]" > <ian@WINDOZEdigiserv.net> wrote: > > >preg_match('/^([-]+)$/', $var) > > Just a tip - don't capture unless you actually want to use the > subexpressions, > and there's no point having a character class of a single character. > > /^-+$/ is enough here. 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.net | forum.digiserv.net Programming, Web design, development & hosting.

point wrote: > > I need some help with regulars... > > how can I check if $var contains only "----" (minus) no metter how many?? Just as a point of interest, I compared the following 3 regular expressions: /^-+$/, /[^-]/, /^([-]+)$/ I was going to suggest !preg_match("/[^-]/",$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. ------ /^-+$/ AVG: 4.4089375120221E-05 seconds (363 sampled) /[^-]/ AVG: 4.4289953219965E-05 seconds (322 sampled) /^([-]+)$/ AVG: 4.4381050836472E-05 seconds (315 sampled) -----------------------------------------3-- /^-+$/ AVG: 4.7261700218106E-05 seconds (324 sampled) /[^-]/ AVG: 5.3900497155554E-05 seconds (353 sampled) /^([-]+)$/ AVG: 5.3713196202328E-05 seconds (323 sampled) --23333333333333333333------- /^-+$/ AVG: 4.3738299402697E-05 seconds (290 sampled) /[^-]/ AVG: 4.3901622804821E-05 seconds (351 sampled) /^([-]+)$/ AVG: 4.5026909342051E-05 seconds (359 sampled) --3------------------------------------------ /^-+$/ AVG: 4.3636065157915E-05 seconds (349 sampled) /[^-]/ AVG: 4.4002504405861E-05 seconds (334 sampled) /^([-]+)$/ AVG: 4.4881733434057E-05 seconds (317 sampled) TESTINGTESTINGTESTING /^-+$/ AVG: 4.2770132922486E-05 seconds (298 sampled) /[^-]/ AVG: 4.4013239057577E-05 seconds (367 sampled) /^([-]+)$/ AVG: 4.2876200889474E-05 seconds (335 sampled) REORDER ARRAY ------ /^([-]+)$/ AVG: 4.5152124530541E-05 seconds (334 sampled) /^-+$/ AVG: 4.4505271685899E-05 seconds (338 sampled) /[^-]/ AVG: 4.5173778766539E-05 seconds (328 sampled) -----------------------------------------3-- /^([-]+)$/ AVG: 5.4088808734965E-05 seconds (322 sampled) /^-+$/ AVG: 4.7325738364301E-05 seconds (341 sampled) /[^-]/ AVG: 5.387234051079E-05 seconds (337 sampled) --23333333333333333333------- /^([-]+)$/ AVG: 4.4645499606867E-05 seconds (331 sampled) /^-+$/ AVG: 4.3906505752659E-05 seconds (318 sampled) /[^-]/ AVG: 4.4383894004713E-05 seconds (351 sampled) --3------------------------------------------ /^([-]+)$/ AVG: 4.4498060430799E-05 seconds (336 sampled) /^-+$/ AVG: 4.3501577726225E-05 seconds (328 sampled) /[^-]/ AVG: 4.3935364200955E-05 seconds (336 sampled) TESTINGTESTINGTESTING /^([-]+)$/ AVG: 4.281405290943E-05 seconds (326 sampled) /^-+$/ AVG: 4.2799590290457E-05 seconds (345 sampled) /[^-]/ AVG: 4.3385659307694E-05 seconds (329 sampled) REORDER ARRAY ------ /[^-]/ AVG: 4.403849682176E-05 seconds (332 sampled) /^([-]+)$/ AVG: 4.4901682613106E-05 seconds (329 sampled) /^-+$/ AVG: 4.3864447107006E-05 seconds (339 sampled) -----------------------------------------3-- /[^-]/ AVG: 5.405314904047E-05 seconds (339 sampled) /^([-]+)$/ AVG: 5.3905426187718E-05 seconds (329 sampled) /^-+$/ AVG: 4.7486948679729E-05 seconds (332 sampled) --23333333333333333333------- /[^-]/ AVG: 4.3712762685922E-05 seconds (325 sampled) /^([-]+)$/ AVG: 4.420560948989E-05 seconds (323 sampled) /^-+$/ AVG: 4.3457881970839E-05 seconds (352 sampled) --3------------------------------------------ /[^-]/ AVG: 4.452014041889E-05 seconds (329 sampled) /^([-]+)$/ AVG: 4.4954001013912E-05 seconds (335 sampled) /^-+$/ AVG: 4.4005612532298E-05 seconds (336 sampled) TESTINGTESTINGTESTING /[^-]/ AVG: 4.2576365675663E-05 seconds (326 sampled) /^([-]+)$/ AVG: 4.18363008818E-05 seconds (329 sampled) /^-+$/ AVG: 4.1880469391311E-05 seconds (345 sampled) ---------------- START CODE <plaintext> <?php $str = array("------", "-----------------------------------------3--", "--23333333333333333333-------", "--3------------------------------------------", "TESTINGTESTINGTESTING"); function getmicrotime(){ list($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;$i<1000;++$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@glassgiant.com http://www.glassgiant.com

Shawn Wilson wrote: > Just as a point of interest, I compared the following 3 regular expressions: <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@glassgiant.com http://www.glassgiant.com

I forgott to say: Thanx guys :))) "point" <point@caanNOSPAMproduction.com> wrote in message news:bil19u01kqn@enews1.newsguy.com... > I need some help with regulars... > > how can I check if $var contains only "----" (minus) no metter how many?? > > Thanx... > > point > >

Similiar Articles:

Password Strength Regular Expression - comp.lang.javascript ...
Hi I just need a regular expression for the condition that the password has to be a ... No special characters allowed. > > Can someone please help me out with a ...

regsub (and regular expressions in general) trouble. - comp.lang ...
> >Could anyone help me with this? I think the regular expression is >going to become much more interesting! I suspect that's fairly easy. If I can make the assumption ...

list of regex special characters - comp.lang.python
... list of special character in python regular expressions that need to be escaped if you want their literal meaning. I searched and can not find the list. Any help ...

Using regular expressions to split a string - comp.lang.javascript ...
Using regular expressions, is it possible to ... Token Type bug - help? - comp.text.pdf Splitting PDF based on Text String - comp.text.pdf Using regular expressions to split ...

Validate form for 4-digit integer - comp.lang.javascript ...
Any help would be much appreciated. > Use a regular expression to validate the format of a string. Here is an example: function checkpostcode(form) { var min = 4 ...

unknown regexp options - comp.lang.ruby
... with the file location that ruby was picking up and processing as a > regular expression. ... without TEMP file?? - comp ... unknown regexp options - comp.lang.ruby Help to ...

RegExp pattern to escape ALL special characters (but exclude ...
grep help with control chars - comp.unix.solaris RegExp pattern to escape ALL ... all the accented or special characters ... repeated characters using our regular expression ...

regex for word in parentheses ? - comp.lang.tcl
> > Can you help me? Thank you, > > Thibaud % set string {string is "hello ... How to have word boundaries in regular expressions in mawk? - comp ... regex for word in ...

Replacing a backslash with a forward slash in Javascript - comp ...
... 134/g,"/"); \134 is the octal representation of a backslash as a regular expression. ... Help to 'pretty'; replace WITHIN file without TEMP file?? - comp ... Replacing ...

Split a price String Object into dollars and cents String Objects ...
I appreciate any effort to help me. Thank you for your time and consideration. ... solution if anyone is curious: The period/dot is a special character in Regular Expressions ...

Regular-Expressions.info - Regex Tutorial, Examples and Reference ...
You will learn quite a lot, even if you have already been using regular expressions for some time. This will help you to understand quickly why a particular regex does ...

Regular Expressions Reference - Basic Syntax
Easily create and understand regular expressions today. Compose and analyze regex patterns with RegexBuddy's easy-to-grasp regex blocks and intuitive regex tree ...

7/15/2012 12:17:46 PM