由空格分隔的正则表达式组单词

Question

I have a question concerning Regex and I hope to get some help. I have a bootstrap code containing several expressions like [col md-6 lg-2] or just [col md-6]. However the amount of columns is not fixed and I can have like [col x y z] or even more.

I'd like to achieve a match with groups like: Group 1: x Group 2: y Group 3: z ... and so on.

Some help would be much appreciated

best regards

Answer 1

You'll want to separate your group with preg_replace_callback then split the found string on spaces. Something like this should do it

$return = '';
preg_replace_callback('/\[col \K[^\]]+/', function($match){
    $GLOBALS['return'] = preg_split('/\s+/', $match[0], -1, PREG_SPLIT_NO_EMPTY);
}, '[col md-6 lg-2]');
print_r($return);

https://3v4l.org/koKFH

This \[col \K is looking for the literal string [col then the \K tells the regex to forget it matched that for the capturing. The [^\]]+ then captures everything until the next ]. We then use that found group in the callback to separate on whitespaces (\s).