php - Regex - space and non-capturing group

Question

I have this kind of string :

Blabla1 Blaabla2<br />  Blaabla3 Blaabla4

I'm trying to explode each word where there is a " " or " " with preg_split .

What I exepect :

Blabla1
Blabla2 <br />
Blaabla3
Blaabla4

I tried with this regex (?:(<br\s))|\s but don't manage to exlude "/>"

http://regexr.com/3aqs0

Thanks !

Are you wanting to retain the  ? Your expected output shows it retained ... — hwnd
– hwnd, Commented Apr 15, 2015 at 17:17
It would probably be clearer if you converted all the   to spaces, and then did the split on spaces. You don't need to do everything in one single regex. — Andy Lester
– Andy Lester, Commented Apr 15, 2015 at 17:45

hwnd · Accepted Answer · 2015-04-15 17:34:26Z

3

One way you could do this:

$str = 'Blabla1 Blaabla2<br />  Blaabla3 Blaabla4';
$results = preg_split('~(?:<br[^>]*>\s*\K|\s+)~', $str);
print_r($results);

Output

Array
(
    [0] => Blabla1
    [1] => Blaabla2<br />  
    [2] => Blaabla3
    [3] => Blaabla4
)

edited Apr 15, 2015 at 17:34

answered Apr 15, 2015 at 17:25

hwnd

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5 Comments

Zagloo Over a year ago

it works nice thx !! but can you explain all please for my information :) . It interest me !

hwnd Over a year ago

Are you just wanting to split on whitespace not inside HTML? And note this will split the   if there is a space preceding it as well. I am not clear what exactly you're trying to achieve here.

Zagloo Over a year ago

In fact, I'm using a text EDITOR (CKEDITOR). When I save the textarea in DataBase, I need to keep all tags ( , , , ). Then when I reload the page with my text Editor I need to split each word with his associated tags because my text editor is coupled with a audio player (Jwplayer) which underline each word in function of time avanced...

Zagloo Over a year ago

Other question, If in my string I have two or more consecutive ? like $str = 'Blabla1 Blaabla2 Blaabla3 Blaabla4'; How to do ?

hwnd Over a year ago

You could do (?:(?:<br[^>]*>\s*)+\K|\s+)

Community · Accepted Answer · 2017-05-23 11:57:03Z

1

If there is not more HTML, it's okay to use RegEx. Otherwise there are many better ways.

Use <br(\s\/)?>\K|\s:

$matches = preg_split('/<br(\s\/)?>\K|\s/',$string);

This will also work for   (which is correct HTML too)

Consider the flag PREG_SPLIT_NO_EMPTY, because there are going to be empty elements using your example string:

preg_split('/<br(\s\/)?>\K|\s/',$string,null,PREG_SPLIT_NO_EMPTY);

Update: To keep the  , you need to reset the match using \K. There is a good example on this in the language reference:

\K can be used to reset the match start since PHP 5.2.4. For example, the pattern foo\Kbar matches "foobar", but reports that it has matched "bar". The use of \K does not interfere with the setting of captured substrings. For example, when the pattern (foo)\Kbar matches "foobar", the first substring is still set to "foo".

edited May 23, 2017 at 11:57

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answered Apr 15, 2015 at 17:15

Marc

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5 Comments

engvrdr Over a year ago

Also he can use PREG_SPLIT_NO_EMPTY for avoiding empty elements, like preg_split('/(?:(<br\s\/>))|\s/',$string,null,PREG_SPLIT_NO_EMPTY);

Marc Over a year ago

Correct, forgot the flags :) I will add this

Zagloo Over a year ago

almost perfect :) ... How to keep the after blabla2 ?

Zagloo Over a year ago

@Marc Works Nice ! :) And now, If in my string I have two or more consecutive ? like $str = 'Blabla1 Blaabla2 Blaabla3 Blaabla4'; How to do ?

Zagloo Over a year ago

find solution here : stackoverflow.com/questions/29671967/… . Thanks for all !

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