PHP Regex每组2个单词

Question

I've been wondering, is it possible to group every 2 words using regex? For 1 word i use this:

((?:\w'|\w|-)+)

This works great. But i need it for 2 (or even more words later on).

But if I use this one:

((?:\w'|\w|-)+) ((?:\w'|\w|-)+) it will make groups of 2 but not really how i want it. And when it encounters a special char it will start over.

Let me give you an example:

If I use it on this text: This is an . example text using & my / Regex expression

It will make groups of This is example text regex expression

and i want groups like this: This is is an an example example text text using using my my regex regex expression

It is okay if it resets after a . So that it won't match hello . guys together for example.

Is this even possible to accomplish? I've just started experimenting with RegEx so i don't quite know the possibilities with this.

If this isn't possible could you point me in a direction that I should take with my problem?

Thanks in advance!

Answer 1

try this

$samp = "This is an . example text using & my / Regex expression";

//removes anything other than alphabets
$samp = preg_replace('/[^A-Z ]/i', "", $samp);

//removes extra spaces
$samp = str_replace("  "," ",$samp);

//the following code splits the sentence into words
$jk = explode(" ",$samp);

$i = sizeof($jk);
$j = 0;

//this combines words in desired format
$array="";
for($j=0;$j<$i-1;$j++)
{
    $array[] = $jk[$j]." ".$jk[$j+1];
}

print_r($array);

Demo

EDIT

for your question

I've changed the regex like this: "/[^A-Z0-9-' ]/i" so it doesn't mess up words like 'you're' and '9-year-old' for example. But by doing this when there is a seperate - or ' in my text, it will treat those as a seperate words. I know why it does this but is it preventable?

change the regex like this

preg_replace('/[^A-Z0-9 ]+[^A-Z0-9\'-]/i', "", $samp)

Demo