Re[2]: [PHP] One more time about regexes
Hello Adam,
You did understand me exactly and perfectly).
Ordering arrays is a good idea but I don't know how to do that
exactly.
For instance, there's a cypher called Polybius square. You write in
the alphabet in a grid like this:
1 a b c d e
2 f g h i j
3 k l m n o
4 p q r s t
5 u v w x y
6 z
There is a way where i/j are equal to make a 5 by 5 square but for me
it's equal since I'm working with a 33-letter Russian alphabet, so no
way to make it a perfect square.
Anyway, a letter has two coordinates and is represented by a two-digit
number. For example, E is 15, K is 21, Z is 61 and so on.
So we have a word, say, PHP. It will look like this: 412341.
What does preg_replace do? Exactly, it's searching 41, then 12, then
23, and so on.
I tried to make a loop:
$length=mb_strlen($str);
for ($i=0; $i$length; $i+=2) {
$pair=mb_substr($str, $i, 2);
$pair=preg_replace($numbers, $letters, $str);
}
It already smells something not good, but anyway.
If I do that, I have one more problem: say, we have a phrase PHP is
the best. So we crypt it and get:
412341 2444 452315 12154445
Then the parser begins: 41=p, 23=h, 41=p, (attention!) \s2=
I marked a whitespace as \s so you see what happens.
I might split the string by spaces but I can't imagine what a user
inputs: it might be a dash, for example...
Sorry for such a long message but I'm really annoyed with this
preg_replace's behavior. And it's not the only one task to
accomplish...
Thanks a lot!
--
With best regards from Ukraine,
Andre
Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon @
jabber.org
Yahoo! messenger: andre.polykanine; ICQ: 191749952
Twitter: m_elensule
- Original message -
From: Adam Richardson simples...@gmail.com
To: php-general@lists.php.net php-general@lists.php.net
Date: Thursday, May 27, 2010, 7:56:28 AM
Subject: [PHP] One more time about regexes
On Wed, May 26, 2010 at 11:10 PM, Nilesh Govindarajan li...@itech7.comwrote:
-- Forwarded message --
From: Nilesh Govindarajan li...@itech7.com
Date: Thu, May 27, 2010 at 8:40 AM
Subject: Re: [PHP] One more time about regexes
To: Andre Polykanine an...@oire.org
On Thu, May 27, 2010 at 3:33 AM, Andre Polykanine an...@oire.org wrote:
Hello everyone,
Sorry, but I'm asking one more time (since it's really annoying me and
I need to apply some really dirty hacks):
Is there a way making preg_replace() pass through the regex one single
time searching from left to right and not to erase what it has already
done?
I can give you a real task I'm accomplishing but the tasks requiring
that tend to multiply...
Thanks a lot!
--
With best regards from Ukraine,
Andre
Http://oire.org/ - The Fantasy blogs of Oire
Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon @
jabber.org
Yahoo! messenger: andre.polykanine; ICQ: 191749952
Twitter: http://twitter.com/m_elensule
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
If you don't want to replace the stuff it has searched then use preg_match
!
--
Nilesh Govindarajan
Facebook: nilesh.gr
Twitter: nileshgr
Website: www.itech7.com
--
Nilesh Govindarajan
Facebook: nilesh.gr
Twitter: nileshgr
Website: www.itech7.com
--
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To unsubscribe, visit: http://www.php.net/unsub.php
If I'm understanding correctly, Andre, you want to perform a replace
operation, but you're observing that there's an element of recursion
happening (e.g., you replace one item with its replacement, and then the new
replacement is also replaced.)
To my knowledge, this won't happen with a standard preg_replace():
$string = 'Bil Tom Phil';
$pattern = '//';
$replacement = 'amp;';
// outputs Bil amp; Tom amp; Phil
echo preg_replace($pattern, $replacement, $string);
However, if you're using arrays to pass in the patterns and replacements,
then one array item could later be replaced by another (see comment and
example on this page by info at gratisrijden dot nl):
http://php.net/manual/en/function.preg-replace.php
If that's the case, you have to carefully structure the order of the array
items so-as to preclude one replacement having the opportunity to override a
subsequent replacement.
Sorry if I misunderstood. You might want to create a simple example of code
showing what you're working through.
Adam
--
Nephtali: PHP web framework that functions beautifully
http://nephtaliproject.com
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
RE: Re[2]: [PHP] One more time about regexes
-Original Message-
From: Andre Polykanine [mailto:an...@oire.org]
Sent: 27 May 2010 09:14
To: Adam Richardson
Cc: php-general@lists.php.net
Subject: Re[2]: [PHP] One more time about regexes
Hello Adam,
You did understand me exactly and perfectly).
Ordering arrays is a good idea but I don't know how to do that
exactly.
For instance, there's a cypher called Polybius square. You write in
the alphabet in a grid like this:
1 a b c d e
2 f g h i j
3 k l m n o
4 p q r s t
5 u v w x y
6 z
There is a way where i/j are equal to make a 5 by 5 square but for
me
it's equal since I'm working with a 33-letter Russian alphabet, so
no
way to make it a perfect square.
Anyway, a letter has two coordinates and is represented by a two-
digit
number. For example, E is 15, K is 21, Z is 61 and so on.
So we have a word, say, PHP. It will look like this: 412341.
Well, as you're wanting to replace pairs of digits, I'd search for exactly that
-- but I think I'd use the e flag to employ a programmed replacement, thus:
$str = 4123415 - 2444 452315 12154445!;
$replaced = preg_replace({(\d\d)}e, polybius_decode('\\1'), $str);
echo $replaced;
function polybius_decode($pair) {
static $polybius = array(
'11'='a', 'b', 'c', 'd', 'e',
'21'='f', 'g', 'h', 'i', 'j',
'31'='k', 'l', 'm', 'n', 'o',
'41'='p', 'q', 'r', 's', 't',
'51'='u', 'v', 'w', 'x', 'y',
'61'='z'
);
return isset($polybius[$pair]) ? $polybius[$pair] : $pair;
}
Seems to work: php5 - is the best!. :)
Cheers!
Mike
--
Mike Ford,
Electronic Information Developer, Libraries and Learning Innovation,
Leeds Metropolitan University, C507, Civic Quarter Campus,
Woodhouse Lane, LEEDS, LS1 3HE, United Kingdom
Email: m.f...@leedsmet.ac.uk
Tel: +44 113 812 4730
To view the terms under which this email is distributed, please go to
http://disclaimer.leedsmet.ac.uk/email.htm
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Re: Re[2]: [PHP] One more time about regexes
On Thu, May 27, 2010 at 4:13 AM, Andre Polykanine an...@oire.org wrote:
Hello Adam,
You did understand me exactly and perfectly).
Ordering arrays is a good idea but I don't know how to do that
exactly.
For instance, there's a cypher called Polybius square. You write in
the alphabet in a grid like this:
1 a b c d e
2 f g h i j
3 k l m n o
4 p q r s t
5 u v w x y
6 z
There is a way where i/j are equal to make a 5 by 5 square but for me
it's equal since I'm working with a 33-letter Russian alphabet, so no
way to make it a perfect square.
Anyway, a letter has two coordinates and is represented by a two-digit
number. For example, E is 15, K is 21, Z is 61 and so on.
So we have a word, say, PHP. It will look like this: 412341.
What does preg_replace do? Exactly, it's searching 41, then 12, then
23, and so on.
I tried to make a loop:
$length=mb_strlen($str);
for ($i=0; $i$length; $i+=2) {
$pair=mb_substr($str, $i, 2);
$pair=preg_replace($numbers, $letters, $str);
}
It already smells something not good, but anyway.
If I do that, I have one more problem: say, we have a phrase PHP is
the best. So we crypt it and get:
412341 2444 452315 12154445
Then the parser begins: 41=p, 23=h, 41=p, (attention!) \s2=
I marked a whitespace as \s so you see what happens.
I might split the string by spaces but I can't imagine what a user
inputs: it might be a dash, for example...
Sorry for such a long message but I'm really annoyed with this
preg_replace's behavior. And it's not the only one task to
accomplish...
Thanks a lot!
--
With best regards from Ukraine,
Andre
Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon @
jabber.org
Yahoo! messenger: andre.polykanine; ICQ: 191749952
Twitter: m_elensule
- Original message -
From: Adam Richardson simples...@gmail.com
To: php-general@lists.php.net php-general@lists.php.net
Date: Thursday, May 27, 2010, 7:56:28 AM
Subject: [PHP] One more time about regexes
On Wed, May 26, 2010 at 11:10 PM, Nilesh Govindarajan li...@itech7.com
wrote:
-- Forwarded message --
From: Nilesh Govindarajan li...@itech7.com
Date: Thu, May 27, 2010 at 8:40 AM
Subject: Re: [PHP] One more time about regexes
To: Andre Polykanine an...@oire.org
On Thu, May 27, 2010 at 3:33 AM, Andre Polykanine an...@oire.org
wrote:
Hello everyone,
Sorry, but I'm asking one more time (since it's really annoying me and
I need to apply some really dirty hacks):
Is there a way making preg_replace() pass through the regex one single
time searching from left to right and not to erase what it has already
done?
I can give you a real task I'm accomplishing but the tasks requiring
that tend to multiply...
Thanks a lot!
--
With best regards from Ukraine,
Andre
Http://oire.org/ - The Fantasy blogs of Oire
Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon
@
jabber.org
Yahoo! messenger: andre.polykanine; ICQ: 191749952
Twitter: http://twitter.com/m_elensule
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
If you don't want to replace the stuff it has searched then use
preg_match
!
--
Nilesh Govindarajan
Facebook: nilesh.gr
Twitter: nileshgr
Website: www.itech7.com
--
Nilesh Govindarajan
Facebook: nilesh.gr
Twitter: nileshgr
Website: www.itech7.com
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
If I'm understanding correctly, Andre, you want to perform a replace
operation, but you're observing that there's an element of recursion
happening (e.g., you replace one item with its replacement, and then the
new
replacement is also replaced.)
To my knowledge, this won't happen with a standard preg_replace():
$string = 'Bil Tom Phil';
$pattern = '//';
$replacement = 'amp;';
// outputs Bil amp; Tom amp; Phil
echo preg_replace($pattern, $replacement, $string);
However, if you're using arrays to pass in the patterns and replacements,
then one array item could later be replaced by another (see comment and
example on this page by info at gratisrijden dot nl):
http://php.net/manual/en/function.preg-replace.php
If that's the case, you have to carefully structure the order of the array
items so-as to preclude one replacement having the opportunity to override
a
subsequent replacement.
Sorry if I misunderstood. You might want to create a simple example of
code
showing what you're working through.
Adam
--
Nephtali: PHP web framework that functions beautifully
http://nephtaliproject.com
Andre,
I'd try something like this:
?php
/**
* Description of PolybiusSquare
*
* @author Adam Richardson, creator of the Nephtali Web Framework
*/
class PolybiusSquare {
public $square_values;
/**
* Creates PolybiusSquare instance for encoding and decoding
[PHP] One more time about regexes
Hello everyone, Sorry, but I'm asking one more time (since it's really annoying me and I need to apply some really dirty hacks): Is there a way making preg_replace() pass through the regex one single time searching from left to right and not to erase what it has already done? I can give you a real task I'm accomplishing but the tasks requiring that tend to multiply... Thanks a lot! -- With best regards from Ukraine, Andre Http://oire.org/ - The Fantasy blogs of Oire Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon @ jabber.org Yahoo! messenger: andre.polykanine; ICQ: 191749952 Twitter: http://twitter.com/m_elensule -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Fwd: [PHP] One more time about regexes
-- Forwarded message -- From: Nilesh Govindarajan li...@itech7.com Date: Thu, May 27, 2010 at 8:40 AM Subject: Re: [PHP] One more time about regexes To: Andre Polykanine an...@oire.org On Thu, May 27, 2010 at 3:33 AM, Andre Polykanine an...@oire.org wrote: Hello everyone, Sorry, but I'm asking one more time (since it's really annoying me and I need to apply some really dirty hacks): Is there a way making preg_replace() pass through the regex one single time searching from left to right and not to erase what it has already done? I can give you a real task I'm accomplishing but the tasks requiring that tend to multiply... Thanks a lot! -- With best regards from Ukraine, Andre Http://oire.org/ - The Fantasy blogs of Oire Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon @ jabber.org Yahoo! messenger: andre.polykanine; ICQ: 191749952 Twitter: http://twitter.com/m_elensule -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php If you don't want to replace the stuff it has searched then use preg_match ! -- Nilesh Govindarajan Facebook: nilesh.gr Twitter: nileshgr Website: www.itech7.com -- Nilesh Govindarajan Facebook: nilesh.gr Twitter: nileshgr Website: www.itech7.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] One more time about regexes
On Wed, May 26, 2010 at 11:10 PM, Nilesh Govindarajan li...@itech7.comwrote: -- Forwarded message -- From: Nilesh Govindarajan li...@itech7.com Date: Thu, May 27, 2010 at 8:40 AM Subject: Re: [PHP] One more time about regexes To: Andre Polykanine an...@oire.org On Thu, May 27, 2010 at 3:33 AM, Andre Polykanine an...@oire.org wrote: Hello everyone, Sorry, but I'm asking one more time (since it's really annoying me and I need to apply some really dirty hacks): Is there a way making preg_replace() pass through the regex one single time searching from left to right and not to erase what it has already done? I can give you a real task I'm accomplishing but the tasks requiring that tend to multiply... Thanks a lot! -- With best regards from Ukraine, Andre Http://oire.org/ - The Fantasy blogs of Oire Skype: Francophile; WlmMSN: arthaelon @ yandex.ru; Jabber: arthaelon @ jabber.org Yahoo! messenger: andre.polykanine; ICQ: 191749952 Twitter: http://twitter.com/m_elensule -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php If you don't want to replace the stuff it has searched then use preg_match ! -- Nilesh Govindarajan Facebook: nilesh.gr Twitter: nileshgr Website: www.itech7.com -- Nilesh Govindarajan Facebook: nilesh.gr Twitter: nileshgr Website: www.itech7.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php If I'm understanding correctly, Andre, you want to perform a replace operation, but you're observing that there's an element of recursion happening (e.g., you replace one item with its replacement, and then the new replacement is also replaced.) To my knowledge, this won't happen with a standard preg_replace(): $string = 'Bil Tom Phil'; $pattern = '//'; $replacement = 'amp;'; // outputs Bil amp; Tom amp; Phil echo preg_replace($pattern, $replacement, $string); However, if you're using arrays to pass in the patterns and replacements, then one array item could later be replaced by another (see comment and example on this page by info at gratisrijden dot nl): http://php.net/manual/en/function.preg-replace.php If that's the case, you have to carefully structure the order of the array items so-as to preclude one replacement having the opportunity to override a subsequent replacement. Sorry if I misunderstood. You might want to create a simple example of code showing what you're working through. Adam -- Nephtali: PHP web framework that functions beautifully http://nephtaliproject.com
