[PHP] Re: Match anything between two " that is not a " except if it is escaped...
A good habit is to use the hex equivalent character for any character that has a
special meaning in pregex expressions. e.g.,
space = \x20
"/" = \x2f
"." = \x2e
double quotes = \x3d
etc.
Then you won't have this type of problem and you won't have to use stuff like
this:
This is for double quotes:
'/"[^"]*(?:.[^"]*)*"/'
this is for single:
'/\'[^\']*(?:.[^\']*)*\'/'
It's almost impossible to debug this nonsense.
Also, use delimiters that do not occur in your pattern. I almost never use "/";
and instead like "%". I assume you know the delimiters can be almost any
character.
mathieu leddet wrote:
Hi everyone,
I am struggling with regular expression trying to match strings
delimited by double quotes, but taking into consideration that \" is not
a string ending character.
---8<---
-
$in = 'this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"';
// pattern for catching strings between "
$pattern = '#"([^"]*)"#';
// surround matching string with HTML span code to highlight
$replacement = '"${1}"';
// perform the reg exp replacement
$out = preg_replace($pattern, $replacement, $in);
---8<---
-
$out contains :
this is a string : "Hi everyone my name is \"Mathieu\"!"
Here is a second string : "PHP is just perfect"
This behaviour is normal considering my pattern (anything between two "
that is not a ").
But I don't know how to get this :
this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"
I would like my pattern to express : Anything between two " that is not
a " except if it is escaped.
Thanks for reading me, any help in return is welcome !
--
Mathieu
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Re: [PHP] Re: Match anything between two " that is not a " except if it is escaped...
On Fri, 2008-01-18 at 12:28 +0200, Nikolay Ananiev wrote: > This is for double quotes: > '/"[^"]*(?:.[^"]*)*"/' > > this is for single: > '/\'[^\']*(?:.[^\']*)*\'/' > > i took these from the smarty compiler class. Has anyone started a commonly used PCRE Regexp library? It could be a simple wiki page or something (we had one on our old site that was getting quite large - but that is now gone - sigh) Anyway, is anyone up for that? These things come up pretty often, and having a library of common ones would save us all a lot of effort in these types of threads. Something like: Purpose: regex : Author : Thoughts? We could use http://fsiu.uwc.ac.za/index.php?module=wiki&action=view_page&name=RegularExpressionMethods for it. --Paul All Email originating from UWC is covered by disclaimer http://www.uwc.ac.za/portal/public/portal_services/disclaimer.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: Match anything between two " that is not a " except if it is escaped...
This is for double quotes:
'/"[^"]*(?:.[^"]*)*"/'
this is for single:
'/\'[^\']*(?:.[^\']*)*\'/'
i took these from the smarty compiler class.
"mathieu leddet" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
Hi everyone,
I am struggling with regular expression trying to match strings
delimited by double quotes, but taking into consideration that \" is not
a string ending character.
---8<---
-
$in = 'this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"';
// pattern for catching strings between "
$pattern = '#"([^"]*)"#';
// surround matching string with HTML span code to highlight
$replacement = '"${1}"';
// perform the reg exp replacement
$out = preg_replace($pattern, $replacement, $in);
---8<---
-
$out contains :
this is a string : "Hi everyone my name is \"Mathieu\"!"
Here is a second string : "PHP is just perfect"
This behaviour is normal considering my pattern (anything between two "
that is not a ").
But I don't know how to get this :
this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"
I would like my pattern to express : Anything between two " that is not
a " except if it is escaped.
Thanks for reading me, any help in return is welcome !
--
Mathieu
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
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Re: [PHP] Re: Match anything between two " that is not a " except if it is escaped...
Max Antonov schreef:
mathieu leddet writes:
Hi everyone,
I am struggling with regular expression trying to match strings
delimited by double quotes, but taking into consideration that \" is not
a string ending character.
..
// pattern for catching strings between "
$pattern = '#"([^"]*)"#';
.
$out contains : this is a string : "Hi everyone my name is
\"Mathieu\"!"
Here is a second string : "PHP is just perfect"
.
--
Mathieu
If I right understand you scope. (yes, my English is bad)
better than our russian.
You hope to get result such as:
this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"
I try to fix you regular expression.
$pattern = '#"(.*?)(?<=[^])"#is';
attend to this: (?<=[^])
attend? don't understand what you mean BUT you have given the OP the
answer by changing his regexp to include a [negative] look behind assertion
for the backslash. :-)
when PHP compile this string - inside it looks like (?<=[^\\])
when regular expression compile inside pcre library it looks like
#"(.*?)(?<=[^\])"#is
this part: (?<=[^\])" is mean folow:
double quote, which not have leading backslash.
see folow:
[EMAIL PROTECTED]:~$ cat preg.php
"${1}"';
// perform the reg exp replacement
$out = preg_replace($pattern, $replacement, $in);
echo $out,"\n\n";
[EMAIL PROTECTED]:~$ php preg.php
this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"
Is this rigth?
--
Max Anotnov (idler at instanceof dot ru)
--
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[PHP] Re: Match anything between two " that is not a " except if it is escaped...
mathieu leddet writes:
Hi everyone,
I am struggling with regular expression trying to match strings
delimited by double quotes, but taking into consideration that \" is not
a string ending character.
..
// pattern for catching strings between "
$pattern = '#"([^"]*)"#';
.
$out contains :
this is a string : "Hi everyone my name is \"Mathieu\"!"
Here is a second string : "PHP is just perfect"
.
--
Mathieu
If I right understand you scope. (yes, my English is bad)
You hope to get result such as:
this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"
I try to fix you regular expression.
$pattern = '#"(.*?)(?<=[^])"#is';
attend to this: (?<=[^])
when PHP compile this string - inside it looks like (?<=[^\\])
when regular expression compile inside pcre library it looks like
#"(.*?)(?<=[^\])"#is
this part: (?<=[^\])" is mean folow:
double quote, which not have leading backslash.
see folow:
[EMAIL PROTECTED]:~$ cat preg.php
"${1}"';
// perform the reg exp replacement
$out = preg_replace($pattern, $replacement, $in);
echo $out,"\n\n";
[EMAIL PROTECTED]:~$ php preg.php
this is a string : "Hi everyone my name is \"Mathieu\"!" Here is
a second string : "PHP is just perfect"
Is this rigth?
--
Max Anotnov (idler at instanceof dot ru)
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