我需要一个正则表达式来匹配所有单个单词和每两个单词

Question

Im using PHP preg_match_all function and I need it to return an array of every single word AND every pair of words, including those single words, for example:

preg_match_all('/the regex/','Stackoverflow is awesome',$matches);

The $matches array should contain:

('Stackoverflow' , 'is' , 'awesome' , 'Stackoverflow is' , 'is awesome')

I've tried with this regex but not getting the expected results:

[a-z]+\s?[a-z]*

Answer 1

I don't think you can achieve that with just regular expressions. I would say, use explode and construct the array yourself.

$string = 'Stackoverflow is awesome';
$parts = explode(' ', $string);
for ($i = 1; $i < count($parts); $i++) {
    $parts[] = $parts[$i - 1] . ' ' . $parts[$i];
}