Optimum way

**Boris ©avc** · Jul 17 '05, 01:42 AM

Re: Optimum way

"Boris ©avc" <boris.savc@odi s-info.com> wrote in message
news:7sXDb.75$% x4.7391@news.si ol.net...[color=blue]
> What would be the optimum code for replacing string "xxx" with "yyyyyyy"[/color]
in[color=blue]
> a file? (maybe with str_replace function?)
>
> Thanks,
> Boris Savc
>
>[/color]

but from point where I can find text "START" to point where I can find text
"STOP" only!

Thanks to you all,
Boris Savc

**Pedro Graca** · Jul 17 '05, 01:42 AM

Re: Optimum way

Boris ©avc wrote:[color=blue]
> "Boris ©avc" <boris.savc@odi s-info.com> wrote in message[color=green]
>> What would be the optimum code for replacing string "xxx" with "yyyyyyy"
>> in a file? (maybe with str_replace function?)[/color][/color]
[color=blue]
> but from point where I can find text "START" to point where I can find text
> "STOP" only![/color]

I might do that using

PHP: strpos - Manual

http://www.php.net/strpos

Find the position of the first occurrence of a substring in a string

PHP: substr - Manual

http://www.php.net/substr

Return part of a string

PHP: str_replace - Manual

http://www.php.net/str_replace

Replace all occurrences of the search string with the replacement string

<?php
// find the first "START" in $contents
$start = strpos($content s, 'START');
if ($start !== false) {
// find first "STOP" *after* the start
$stop = strpos($content s, 'STOP', $start);
if ($stop !== false) {
$partial_conten ts = substr($content s, $start, $stop-$start);
$partial_conten ts = str_replace('xx x', 'yyyyyyy', $partial_conten ts);
$contents = substr($content s, 0, $start)
. $partial_conten ts
. substr($content s, $stop);
}
}
// done! $contents changed
?>
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

**Boris Savc** · Jul 17 '05, 01:42 AM

Re: Optimum way

"Pedro Graca" <hexkid@hotpop. com> wrote in message
news:brpjg4$5vh 3r$1@ID-203069.news.uni-berlin.de...[color=blue]
> Boris ©avc wrote:[color=green]
> > "Boris ©avc" <boris.savc@odi s-info.com> wrote in message[color=darkred]
> >> What would be the optimum code for replacing string "xxx" with[/color][/color][/color]
"yyyyyyy"[color=blue][color=green][color=darkred]
> >> in a file? (maybe with str_replace function?)[/color][/color]
>[color=green]
> > but from point where I can find text "START" to point where I can find[/color][/color]
text[color=blue][color=green]
> > "STOP" only![/color]
>
> I might do that using
> http://www.php.net/strpos
> http://www.php.net/substr
> http://www.php.net/str_replace
>
>
> <?php
> // find the first "START" in $contents
> $start = strpos($content s, 'START');
> if ($start !== false) {
> // find first "STOP" *after* the start
> $stop = strpos($content s, 'STOP', $start);
> if ($stop !== false) {
> $partial_conten ts = substr($content s, $start, $stop-$start);
> $partial_conten ts = str_replace('xx x', 'yyyyyyy', $partial_conten ts);
> $contents = substr($content s, 0, $start)
> . $partial_conten ts
> . substr($content s, $stop);
> }
> }
> // done! $contents changed
> ?>
> --
> --= my mail box only accepts =--
> --= Content-Type: text/plain =--
> --= Size below 10001 bytes =--[/color]

Thanks a million times. Great pointers. Have you got maybe some idea how to
find "TEXT 9999" (9999 are random numeric fields) with "TEXT 99 TEXT 99"?

Regards,
Boris Savc

**Pedro Graca** · Jul 17 '05, 01:42 AM

Re: Optimum way

Boris Savc wrote:[color=blue]
> Have you got maybe some idea how to
> find "TEXT 9999" (9999 are random numeric fields) with "TEXT 99 TEXT 99"?[/color]

????

Try regexps:

PHP: PCRE - Manual

http://www.php.net/PCRE

Regular Expressions (Perl-Compatible)

When you start using them you might find "The regex coach" [1] a very
good tool.

[1] http://www.weitz.de/regex-coach/
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

**Rahul Anand** · Jul 17 '05, 01:43 AM

Re: Optimum way

Hi Boris Savc,

Using PCRE function preg_replace the required search and replace can
be implemented by following code:

[SNIP]

$contents = "sdkfnajk nsdnfkafk nsdkf a START jsdfnjkan ndk fnkkfg
xxxkmkxlklxkkxx xx STOP nsdfhvklahdfkh ansbnfj ajdfh xxx fSTOP sdjfh
sdkfj jasdfkl START dsf xxxxxxx h kljsdfh STOP dskfjl; kj;xxx xxxxx";

echo preg_replace("/(START.*xxx.*ST OP)/Ue","str_replac e('xxx','yyyy', '$1')",$content s);

[/SNIP]

This code will replcae all xxx between START & STOP with yyyy.

-- Rahul

"Boris ©avc" <boris.savc@odi s-info.com> wrote in message news:<zPXDb.79$ %x4.7427@news.s iol.net>...[color=blue]
> "Boris ©avc" <boris.savc@odi s-info.com> wrote in message
> news:7sXDb.75$% x4.7391@news.si ol.net...[color=green]
> > What would be the optimum code for replacing string "xxx" with "yyyyyyy"[/color]
> in[color=green]
> > a file? (maybe with str_replace function?)
> >
> > Thanks,
> > Boris Savc
> >
> >[/color]
>
> but from point where I can find text "START" to point where I can find text
> "STOP" only!
>
> Thanks to you all,
> Boris Savc[/color]

**Boris ©avc** · Jul 17 '05, 01:43 AM

Re: Optimum way

"Pedro Graca" <hexkid@hotpop. com> wrote in message
news:brpphu$653 t1$1@ID-203069.news.uni-berlin.de...[color=blue]
> Boris Savc wrote:[color=green]
> > Have you got maybe some idea how to
> > find "TEXT 9999" (9999 are random numeric fields) with "TEXT 99 TEXT[/color][/color]
99"?[color=blue]
>
> ????
>
> Try regexps:
> http://www.php.net/PCRE
>
> When you start using them you might find "The regex coach" [1] a very
> good tool.
>
> [1] http://www.weitz.de/regex-coach/
> --
> --= my mail box only accepts =--
> --= Content-Type: text/plain =--
> --= Size below 10001 bytes =--[/color]

I can find TEXT 9999 and change it to some TEXT but how about changing it to
TEXT1 99 and TEXT2 99, where 99 and 99 are the digits from original
expression. Any ideas?

Thanks,
Boris Savc

**Pedro Graca** · Jul 17 '05, 01:43 AM

Re: Optimum way

Boris ©avc wrote:[color=blue]
> I can find TEXT 9999 and change it to some TEXT but how about changing it to
> TEXT1 99 and TEXT2 99, where 99 and 99 are the digits from original
> expression. Any ideas?[/color]

Regexps are your friends :)

<?php
$x = 'abc TEXT 5496 def TEXT 0901 ghi';
$y = preg_replace('/TEXT (\d{2})(\d{2})/', 'TEXT1 $1 TEXT2 $2', $x);
echo $x, ' -- ', $y, "\n";
?>
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

**Boris Savc** · Jul 17 '05, 01:43 AM

Re: Optimum way

"Pedro Graca" <hexkid@hotpop. com> wrote in message
news:brrspk$6o8 r9$1@ID-203069.news.uni-berlin.de...[color=blue]
> Boris ©avc wrote:[color=green]
> > I can find TEXT 9999 and change it to some TEXT but how about changing[/color][/color]
it to[color=blue][color=green]
> > TEXT1 99 and TEXT2 99, where 99 and 99 are the digits from original
> > expression. Any ideas?[/color]
>
> Regexps are your friends :)
>
> <?php
> $x = 'abc TEXT 5496 def TEXT 0901 ghi';
> $y = preg_replace('/TEXT (\d{2})(\d{2})/', 'TEXT1 $1 TEXT2 $2', $x);
> echo $x, ' -- ', $y, "\n";
> ?>
> --
> --= my mail box only accepts =--
> --= Content-Type: text/plain =--
> --= Size below 10001 bytes =--[/color]

Thanks again Pedro!

You have really all the answers. Your tip for Regex Coach was great also.
I'm using it all the time. Hope I'll learn my regexps :-) But still one more
question: If I want to do the same with characters let's say XTEXTY change
with XTEXT TEXT TEXT Y how to do that? (\w finds it, but how to do a
replacement?)

Regards,
Boris Savc

**Pedro Graca** · Jul 17 '05, 01:43 AM

Re: Optimum way

Boris Savc wrote:[color=blue]
> But still one more
> question: If I want to do the same with characters let's say XTEXTY change
> with XTEXT TEXT TEXT Y how to do that? (\w finds it, but how to do a
> replacement?)[/color]

This one I'll let you figure out by yourself :-)

Parenthesis in the pattern _grab_ their contents into $1, $2, ...
and you can use these references in the substitution part

preg_replace('/
TEXT # match literal TEXT
(\d\d) # match two digits and grab into $1
(\d\d) # match two digits and grab into $2
/x', ## specify extended syntax for regexp

'TEXT $1 TEXT $2', # replace with TEXT (space)
# whatever was grabbed into $1
# (space) TEXT (space)
# and whatever was grabbed into $2
'TEXT8764');

Happy regexing :-)
--
--= my mail box only accepts =--
--= Content-Type: text/plain =--
--= Size below 10001 bytes =--

**Boris ©avc** · Jul 17 '05, 01:43 AM

Re: Optimum way

"Boris Savc" <boris.savc@odi s-info.com> wrote in message
news:8kfEb.107$ %x4.10059@news. siol.net...[color=blue]
>
> "Pedro Graca" <hexkid@hotpop. com> wrote in message
> news:brrspk$6o8 r9$1@ID-203069.news.uni-berlin.de...[color=green]
> > Boris ©avc wrote:[color=darkred]
> > > I can find TEXT 9999 and change it to some TEXT but how about changing[/color][/color]
> it to[color=green][color=darkred]
> > > TEXT1 99 and TEXT2 99, where 99 and 99 are the digits from original
> > > expression. Any ideas?[/color]
> >
> > Regexps are your friends :)
> >
> > <?php
> > $x = 'abc TEXT 5496 def TEXT 0901 ghi';
> > $y = preg_replace('/TEXT (\d{2})(\d{2})/', 'TEXT1 $1 TEXT2 $2', $x);
> > echo $x, ' -- ', $y, "\n";
> > ?>
> > --
> > --= my mail box only accepts =--
> > --= Content-Type: text/plain =--
> > --= Size below 10001 bytes =--[/color]
>
> Thanks again Pedro!
>
> You have really all the answers. Your tip for Regex Coach was great also.
> I'm using it all the time. Hope I'll learn my regexps :-) But still one[/color]
more[color=blue]
> question: If I want to do the same with characters let's say XTEXTY change
> with XTEXT TEXT TEXT Y how to do that? (\w finds it, but how to do a
> replacement?)
>
> Regards,
> Boris Savc
>
>[/color]

Sorry. Found it. It's the same way like with numbers.

Thanks and have a great day,
Boris

Optimum way

Optimum way

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