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From: Jim Lucas on 22 Jun 2010 13:57
Shreyas Agasthya wrote:
> Then, when does one use ereg_replace as against preg_replace? I read from
> one the forums that preg_* is faster and ereg_* is if not faster but
> simpler.

BUT, all the ereg_* has been depricated. DO NOT USE THEM if you want your code
to work in the future. :)

>
> Is that it?
>
> Regards,
> Shreyas
>
>
>
> On Tue, Jun 22, 2010 at 9:58 PM, Richard Quadling <rquadling(a)gmail.com>wrote:
>
>> "A "word" character is any letter or digit or the underscore
>> character, that is, any character which can be part of a Perl "word".
>> The definition of letters and digits is controlled by PCRE's character
>> tables, and may vary if locale-specific matching is taking place. For
>> example, in the "fr" (French) locale, some character codes greater
>> than 128 are used for accented letters, and these are matched by \w."
>>
>> The above becomes ...
>>
>> _A _word_ character is any letter or digit or the underscore
>> character_ that is_ any character which can be part of a Perl _word__
>> The definition of letters and digits is controlled by PCRE_s character
>> tables_ and may vary if locale_specific matching is taking place_ For
>> example_ in the _fr_ _French_ locale_ some character codes greater
>> than 128 are used for accented letters_ and these are matched by _w__
>>
>> --
>> -----
>> Richard Quadling
>> "Standing on the shoulders of some very clever giants!"
>> EE : http://www.experts-exchange.com/M_248814.html
>> EE4Free : http://www.experts-exchange.com/becomeAnExpert.jsp
>> Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
>> ZOPA : http://uk.zopa.com/member/RQuadling
>>
>> --
>> PHP General Mailing List (http://www.php.net/)
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>
>>
>
>


--
Jim Lucas

A: Maybe because some people are too annoyed by top-posting.
Q: Why do I not get an answer to my question(s)?
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
From: Rick Dwyer on 22 Jun 2010 16:52


On Jun 22, 2010, at 1:41 PM, Ashley Sheridan wrote:
>
> It is clean, but as Richard mentioned, it won't handle strings
> outside of the traditional 128 ASCII range, so accented characters
> and the like will be converted to an underscore. Also, spaces might
> become an issue.
>
> However, if you are happy that your input won't go beyond the a-z0-9
> range, then it should do what you need.

No, actually I'm fairly confident characters outside the 128 range are
what are causing me problems now.

So I will try Richard's method.

Thanks to all.

--Rick

From: Rick Dwyer on 22 Jun 2010 20:03
Hello again list.

My code for stripping characters is below. I'm hoping to get feedback
as to how rock solid it will provide the desired output under any
circumstance:

My output must look like this (no quotes):

"This-is-my-string-with-lots-of-junk-characters-in-it"

The code with string looks like this:

$old_string = 'ééééThis is my & $string -- with ƒ
lots˙˙˙of junk characters in it¡™£¢∞§¶•ªºœ∑´®†
¥¨ˆøπ“‘ååååååß∂ƒ©˙∆˚¬…æ`````````__________';

$find = '/[^a-z0-9]/i';
$replace = ' ';

$new_string = preg_replace($find, $replace, $old_string);
$new_string = preg_replace("/ {2,}/", "-", $new_string);
$new_string = preg_replace("/ {1,}/", "-", $new_string);

$new_string = rtrim($new_string, "-");
$new_string = ltrim($new_string, "-");


echo $new_string;

Will the logic above capture and remove every non alpha numeric
character and place a SINGLE hyphen between the non contiguous alpha
numeric characters?

Thanks for the help on this.


--Rick


On Jun 22, 2010, at 4:52 PM, Rick Dwyer wrote:

>
>
> On Jun 22, 2010, at 1:41 PM, Ashley Sheridan wrote:
>>
>> It is clean, but as Richard mentioned, it won't handle strings
>> outside of the traditional 128 ASCII range, so accented characters
>> and the like will be converted to an underscore. Also, spaces might
>> become an issue.
>>
>> However, if you are happy that your input won't go beyond the a-
>> z0-9 range, then it should do what you need.
>
> No, actually I'm fairly confident characters outside the 128 range
> are what are causing me problems now.
>
> So I will try Richard's method.
>
> Thanks to all.
>
> --Rick
>

From: Ashley Sheridan on 22 Jun 2010 20:14
On Tue, 2010-06-22 at 20:03 -0400, Rick Dwyer wrote:

> Hello again list.
>
> My code for stripping characters is below. I'm hoping to get feedback
> as to how rock solid it will provide the desired output under any
> circumstance:
>
> My output must look like this (no quotes):
>
> "This-is-my-string-with-lots-of-junk-characters-in-it"
>
> The code with string looks like this:
>
> $old_string = 'ééééThis is my & $string -- with ƒ
> lots˙˙˙of junk characters in it¡™£¢∞§¶•ªºœ∑´®†
> ¥¨ˆøπ“‘ååååååß∂ƒ©˙∆˚¬…æ`````````__________';
>
> $find = '/[^a-z0-9]/i';
> $replace = ' ';
>
> $new_string = preg_replace($find, $replace, $old_string);
> $new_string = preg_replace("/ {2,}/", "-", $new_string);
> $new_string = preg_replace("/ {1,}/", "-", $new_string);
>
> $new_string = rtrim($new_string, "-");
> $new_string = ltrim($new_string, "-");
>
>
> echo $new_string;
>
> Will the logic above capture and remove every non alpha numeric
> character and place a SINGLE hyphen between the non contiguous alpha
> numeric characters?
>
> Thanks for the help on this.
>
>
> --Rick
>
>
> On Jun 22, 2010, at 4:52 PM, Rick Dwyer wrote:
>
> >
> >
> > On Jun 22, 2010, at 1:41 PM, Ashley Sheridan wrote:
> >>
> >> It is clean, but as Richard mentioned, it won't handle strings
> >> outside of the traditional 128 ASCII range, so accented characters
> >> and the like will be converted to an underscore. Also, spaces might
> >> become an issue.
> >>
> >> However, if you are happy that your input won't go beyond the a-
> >> z0-9 range, then it should do what you need.
> >
> > No, actually I'm fairly confident characters outside the 128 range
> > are what are causing me problems now.
> >
> > So I will try Richard's method.
> >
> > Thanks to all.
> >
> > --Rick
> >
>
>


You can remove the second line of code, as the third one is replacing
what line 2 does anyway.

Also, instead of a rtrim and ltrim, you can merge the two with a single
call to trim, which will work on both ends of the string at once.

Thanks,
Ash
http://www.ashleysheridan.co.uk


From: Rick Dwyer on 22 Jun 2010 20:21
Very good.
Thank you.

--Rick


On Jun 22, 2010, at 8:14 PM, Ashley Sheridan wrote:

> On Tue, 2010-06-22 at 20:03 -0400, Rick Dwyer wrote:
>>
>> Hello again list.
>>
>> My code for stripping characters is below. I'm hoping to get
>> feedback
>> as to how rock solid it will provide the desired output under any
>> circumstance:
>>
>> My output must look like this (no quotes):
>>
>> "This-is-my-string-with-lots-of-junk-characters-in-it"
>>
>> The code with string looks like this:
>>
>> $old_string = 'ééééThis is my & $string -- with ƒ
>> lots˙˙˙of junk characters in it¡™£¢∞§¶•ªºœ∑´®†
>> ¥¨ˆøπ“‘ååååååß∂ƒ©˙∆˚¬…
>> æ`````````__________';
>>
>> $find = '/[^a-z0-9]/i';
>> $replace = ' ';
>>
>> $new_string = preg_replace($find, $replace, $old_string);
>> $new_string = preg_replace("/ {2,}/", "-", $new_string);
>> $new_string = preg_replace("/ {1,}/", "-", $new_string);
>>
>> $new_string = rtrim($new_string, "-");
>> $new_string = ltrim($new_string, "-");
>>
>>
>> echo $new_string;
>>
>> Will the logic above capture and remove every non alpha numeric
>> character and place a SINGLE hyphen between the non contiguous alpha
>> numeric characters?
>>
>> Thanks for the help on this.
>>
>>
>> --Rick
>>
>>
>> On Jun 22, 2010, at 4:52 PM, Rick Dwyer wrote:
>>
>> >
>> >
>> > On Jun 22, 2010, at 1:41 PM, Ashley Sheridan wrote:
>> >>
>> >> It is clean, but as Richard mentioned, it won't handle strings
>> >> outside of the traditional 128 ASCII range, so accented characters
>> >> and the like will be converted to an underscore. Also, spaces
>> might
>> >> become an issue.
>> >>
>> >> However, if you are happy that your input won't go beyond the a-
>> >> z0-9 range, then it should do what you need.
>> >
>> > No, actually I'm fairly confident characters outside the 128 range
>> > are what are causing me problems now.
>> >
>> > So I will try Richard's method.
>> >
>> > Thanks to all.
>> >
>> > --Rick
>> >
>>
>>
>
> You can remove the second line of code, as the third one is
> replacing what line 2 does anyway.
>
> Also, instead of a rtrim and ltrim, you can merge the two with a
> single call to trim, which will work on both ends of the string at
> once.
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>

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