Capturing substrings with preg_match_all()

[ngmr80]

Hi,

I'm experiencing a problem when trying to capture substrings with
preg_match_all() from strings like

"set('Hello','World')"

using the following Regular Expression (PERL syntax):

"/^set\((?:'([^']+)'(?(?!\)),))+\)$/"

The resulting matches array looks like this:

Array
(
[0] =Array
(
[0] =set('Hello','World')
)

[1] =Array
(
[0] =World
)

)

I wonder why "Hello" is not in the matches array. Did I do something
wrong in my Regular Expression?

Thanks in advance.
Ingmar

[gosha bine]

On 05.06.2007 17:18 ngmr80 wrote:

Hi,

I'm experiencing a problem when trying to capture substrings with
preg_match_all() from strings like

"set('Hello','World')"

using the following Regular Expression (PERL syntax):

"/^set\((?:'([^']+)'(?(?!\)),))+\)$/"

The resulting matches array looks like this:

Array
(
[0] =Array
(
[0] =set('Hello','World')
)

[1] =Array
(
[0] =World
)

)

I wonder why "Hello" is not in the matches array. Did I do something
wrong in my Regular Expression?

Thanks in advance.
Ingmar

Hi Ingmar

grouping is not automatic, to capture N strings you must have N groups
in your expression or use preg_match_all, for example:

$re1 = '/set\( (.*?) \)/x';
$re2 = "/' (?: \\\\. | [^'] )* ' /x";

preg_match($re1, "set('Hello','Wo\'rld')", $m);
preg_match_all($re2, $m[1], $m);
print_r($m);


--
gosha bine

extended php parser ~ http://code.google.com/p/pihipi
blok ~ http://www.tagarga.com/blok