Re: Replace in a string with regex

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On Wed, Jul 22, 2009 at 9:07 AM, rszeus<rszeus@xxxxxxxxx> wrote:
> Hi. It Works to remove the _1 but it doesn't replace '7a45gfdi6icpan1jtb1j99o925' for 'test'
>
> Thank you
>
> -----Mensagem original-----
> De: Eddie Drapkin [mailto:oorza2k5@xxxxxxxxx]
> Enviada: quarta-feira, 22 de Julho de 2009 13:11
> Para: rszeus
> Cc: php-general@xxxxxxxxxxxxx
> Assunto: Re:  Replace in a string with regex
>
> On Wed, Jul 22, 2009 at 8:02 AM, rszeus<rszeus@xxxxxxxxx> wrote:
>> Hello,
>>
>> I’m tryng to make some replacements on a string.
>>
>> Everything goês fine until the regular expression.
>>
>>
>>
>> $file = "screens/temp/7a45gfdi6icpan1jtb1j99o925_1_main.jpg";
>>
>> echo $a =  str_replace(array(7a45gfdi6icpan1jtb1j99o925,
>> 'temp/',’_([0-9])’), array(“test”,"",””), $file)
>>
>>
>>
>> The idea is to remove /temp and the last _1 from the file name..but i’m only
>> getting this:
>>
>> screens/test_1_main.jpg
>>
>>
>>
>> I want it to be: screens/test_main.jpg
>>
>>
>>
>> Thank you
>>
>>
>>
>>
>
> If you're trying to do a regular expression based search and replace,
> you probably ought to use preg_replace instead of str_replace, as
> str_replace doesn't parse regular expressions.
>
> Try this one out, I think I got what you wanted to do:
>
> <?php
>
> $file = "screens/temp/7a45gfdi6icpan1jtb1j99o925_1_main.jpg";
>
> echo preg_replace('#(screens/)temp/(.+?)_1(_main\.jpg)#', '$1$2$3', $file);
>
>

In the second parameter, $2 is the string you'd want to replace to
test so change '$1$2$3' to '$1test$3'.

It seems like you're having trouble with regular expressions, may I
suggest you read up on them?

http://www.regular-expressions.info/ is a pretty great free resource,
as ridiculous as the design is.

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