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What this means "(\w|-)+@\w"? [message #174784]

Thu, 07 July 2011 13:58

zhang yun
Messages: 3
Registered: July 2011

Karma:

Junior Member

Hi,there
I have some problems in regular expression, here is code :
function is_email($e_name)
{
$arr = array("ac","com","net","org","edu","gov","mil","ac\.cn",
"com\.cn","edu\.cn","net\.cn","org\.cn");
$str = implode("|",$arr);
$reg ='/^[0-9a-zA-z](\w|-)+@\w+\.('.$str.')$/';
//echo $reg;
if(preg_match($reg,strtolower($e_name)))
return strtolower($e_name);
else
return false;
}

I don't know the exactly meaning of "(\w|-)+@\w", could you help me
figure out its meaning? I'm new to posix standard.

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[Message index]

		What this means "(\w\|-)+@\w"? By: zhang yun on Thu, 07 July 2011 13:58
		Re: What this means "(\w\|-)+@\w"? By: Michael Fesser on Thu, 07 July 2011 15:39
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Thu, 07 July 2011 18:23
		Re: What this means "(\w\|-)+@\w"? By: Michael Fesser on Thu, 07 July 2011 19:12
		Re: What this means "(\w\|-)+@\w"? By: Thomas 'PointedEars' on Thu, 07 July 2011 19:12
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Fri, 08 July 2011 06:05
		Re: What this means "(\w\|-)+@\w"? By: alvaro.NOSPAMTHANX on Fri, 08 July 2011 06:42
		Re: What this means "(\w\|-)+@\w"? By: Sandman on Tue, 02 August 2011 08:06
		Re: What this means "(\w\|-)+@\w"? By: alvaro.NOSPAMTHANX on Tue, 02 August 2011 09:50
		Re: What this means "(\w\|-)+@\w"? By: Peter H. Coffin on Tue, 02 August 2011 12:56
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Tue, 02 August 2011 20:53
		Re: What this means "(\w\|-)+@\w"? By: Peter H. Coffin on Wed, 03 August 2011 13:32
		Re: What this means "(\w\|-)+@\w"? By: alvaro.NOSPAMTHANX on Wed, 03 August 2011 08:55
		Re: What this means "(\w\|-)+@\w"? By: Peter H. Coffin on Wed, 03 August 2011 13:46
		Re: What this means "(\w\|-)+@\w"? By: Sandman on Tue, 02 August 2011 22:21
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Wed, 03 August 2011 07:45
		Re: What this means "(\w\|-)+@\w"? By: Sandman on Wed, 03 August 2011 08:02
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Fri, 05 August 2011 00:05

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		What this means "(\w\|-)+@\w"? By: zhang yun on Thu, 07 July 2011 13:58
		Re: What this means "(\w\|-)+@\w"? By: Michael Fesser on Thu, 07 July 2011 15:39
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Thu, 07 July 2011 18:23
		Re: What this means "(\w\|-)+@\w"? By: Michael Fesser on Thu, 07 July 2011 19:12
		Re: What this means "(\w\|-)+@\w"? By: Thomas 'PointedEars' on Thu, 07 July 2011 19:12
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Fri, 08 July 2011 06:05
		Re: What this means "(\w\|-)+@\w"? By: alvaro.NOSPAMTHANX on Fri, 08 July 2011 06:42
		Re: What this means "(\w\|-)+@\w"? By: Sandman on Tue, 02 August 2011 08:06
		Re: What this means "(\w\|-)+@\w"? By: alvaro.NOSPAMTHANX on Tue, 02 August 2011 09:50
		Re: What this means "(\w\|-)+@\w"? By: Peter H. Coffin on Tue, 02 August 2011 12:56
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Tue, 02 August 2011 20:53
		Re: What this means "(\w\|-)+@\w"? By: Peter H. Coffin on Wed, 03 August 2011 13:32
		Re: What this means "(\w\|-)+@\w"? By: alvaro.NOSPAMTHANX on Wed, 03 August 2011 08:55
		Re: What this means "(\w\|-)+@\w"? By: Peter H. Coffin on Wed, 03 August 2011 13:46
		Re: What this means "(\w\|-)+@\w"? By: Sandman on Tue, 02 August 2011 22:21
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Wed, 03 August 2011 07:45
		Re: What this means "(\w\|-)+@\w"? By: Sandman on Wed, 03 August 2011 08:02
		Re: What this means "(\w\|-)+@\w"? By: Eli the Bearded on Fri, 05 August 2011 00:05