正则表达式检查数组是否包含一些单词

Question

I have an array of matching words:

$search = array("lorem","dolor","sit");

And an array to search in:

 $results= array(
       "Lorem ipsum dolor sit amet, consectetur",
       "Ut enim ad minim veniam, quis nostrud exercitation"
       "Duis aute irure dolor in reprehenderit in voluptate velit esse"
       "Excepteur sint occaecat cupidatat non proident"
    );

Is there a regex to return true where two of given words are matching?

Answer 1

You can generate a regex to search by this

$regex = '/(' . implode('|', $search) . ')/i';

which will be:

/(lorem|dolor|sit)/i

The /i makes it caseless.

You can then use the return value of preg_match_all() to see the number of matched words.