Using preg_replace() is there a simple regexp to strip everything from a
string except alpha and numeric chars (a-zA-Z0-9)?
$input = "$tring1!";
$pattern =
$input = preg_replace($pattern, "", $input);
result: "tring1" 5 9013
Bosconian wrote: Using preg_replace() is there a simple regexp to strip everything from a string except alpha and numeric chars (a-zA-Z0-9)?
$input = "$tring1!"; $pattern = $input = preg_replace($pattern, "", $input);
result: "tring1"
Chances are anything you will ever try to do with regexp's has been done,
and there may even be a shortcut for it. So at this page: http://www.php.net/manual/en/referen...ern.syntax.php
you would be able to find this:
$input = preg_replace('\W','',$input)
This will leave in underscores, but that is easily fixed:
$input = preg_replace('[\W_]','',$input)
Also try reading an introduction to regexp's in a Perl guide, you can likely
find something more of a tutorial there to get you started.
--
Kenneth Downs
Secure Data Software, Inc.
(Ken)nneth@(Sec)ure(Dat)a(.com)
"Kenneth Downs" <kn**************@see.sigblock> wrote in message
news:3i************@pluto.downsfam.net... Bosconian wrote:
Using preg_replace() is there a simple regexp to strip everything from a string except alpha and numeric chars (a-zA-Z0-9)?
$input = "$tring1!"; $pattern = $input = preg_replace($pattern, "", $input);
result: "tring1" Chances are anything you will ever try to do with regexp's has been done, and there may even be a shortcut for it. So at this page:
http://www.php.net/manual/en/referen...ern.syntax.php
you would be able to find this:
$input = preg_replace('\W','',$input)
This will leave in underscores, but that is easily fixed:
$input = preg_replace('[\W_]','',$input)
Also try reading an introduction to regexp's in a Perl guide, you can
likely find something more of a tutorial there to get you started.
-- Kenneth Downs Secure Data Software, Inc. (Ken)nneth@(Sec)ure(Dat)a(.com)
Ken,
I was able to use your example, but not without adding starting and ending
delimiters:
'/[\W_]/'
Nothing was stripped without them.
I will bone-up on my regexp syntax.
Many thanks.
Bosconian wrote: I was able to use your example, but not without adding starting and ending delimiters: '/[\W_]/'
You might find '/[\W_]+/' faster. Also, on the linked doc page it says
the \w and \W are locale specific; there might be accented characters
left behind. If you don't want that, use '/[^a-z0-9]+/i'.
--
Firefox Web Browser - Rediscover the web - http://getffox.com/
Thunderbird E-mail and Newsgroups - http://gettbird.com/
Bosconian wrote: "Kenneth Downs" <kn**************@see.sigblock> wrote in message news:3i************@pluto.downsfam.net... Bosconian wrote:
> Using preg_replace() is there a simple regexp to strip everything from > a string except alpha and numeric chars (a-zA-Z0-9)? > > $input = "$tring1!"; > $pattern = > $input = preg_replace($pattern, "", $input); > > result: "tring1"
Chances are anything you will ever try to do with regexp's has been done, and there may even be a shortcut for it. So at this page:
http://www.php.net/manual/en/referen...ern.syntax.php
you would be able to find this:
$input = preg_replace('\W','',$input)
This will leave in underscores, but that is easily fixed:
$input = preg_replace('[\W_]','',$input)
Also try reading an introduction to regexp's in a Perl guide, you can likely find something more of a tutorial there to get you started.
-- Kenneth Downs Secure Data Software, Inc. (Ken)nneth@(Sec)ure(Dat)a(.com)
Ken,
I was able to use your example, but not without adding starting and ending delimiters:
'/[\W_]/'
Nothing was stripped without them.
I will bone-up on my regexp syntax.
Many thanks.
I would love to say I left the delimiters out on purpose to improve your
skills, but it would be a lie. I just forgot.
Glad it helped.
--
Kenneth Downs
Secure Data Software, Inc.
(Ken)nneth@(Sec)ure(Dat)a(.com)
"Ewoud Dronkert" <fi*******@lastname.net.invalid> wrote in message
news:42*********************@dreader4.news.xs4all. nl... Bosconian wrote: I was able to use your example, but not without adding starting and
ending delimiters: '/[\W_]/'
You might find '/[\W_]+/' faster. Also, on the linked doc page it says the \w and \W are locale specific; there might be accented characters left behind. If you don't want that, use '/[^a-z0-9]+/i'.
-- Firefox Web Browser - Rediscover the web - http://getffox.com/ Thunderbird E-mail and Newsgroups - http://gettbird.com/
Even better. Thanks for the tip. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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