查找字符串中与多个数组键匹配的所有单词

Question

I have an array like array("red","blue","azure"...) and i have a string that might contain some of the words. The task is to get array of all the matching colors from the given string.

String example: "Red fox met a blue whale". It should output ["red","blue"]

Give me a starting point to go on with.

Thanks, Martti

Answer 1

str_word_count() with a format argument of 1 or 2, then an array_intersect().... but watch out for case-sensitivity, force it all to lower case first

$matchWords = array("red","blue","azure");
$sentence = "Red fox met a blue whale";

$result = array_intersect(
    $matchWords,
    str_word_count(strtolower($sentence), 1)
);

var_dump($result);

Demo