How to search array of string in another string in PHP?

Question

Firstly, I want to inform that, what I need is the reverse of in_array PHP function.

I need to search all items of array in the string if any of them found, function will return true otherwise return false.

I need the fastest solution to this problem, off course this can be succeeded by iterating the array and using the strpos function.

Any suggestions are welcome.

Example Data:

$string = 'Alice goes to school every day';

$searchWords = array('basket','school','tree');

returns true

$string = 'Alice goes to school every day';

$searchWords = array('basket','cat','tree');

returns false

Answer 1

You should try with a preg_match:

if (preg_match('/' . implode('|', $searchWords) . '/', $string)) return true;

After some comments here a properly escaped solution:

function contains($string, Array $search, $caseInsensitive = false) {
    $exp = '/'
        . implode('|', array_map('preg_quote', $search))
        . ($caseInsensitive ? '/i' : '/');
    return preg_match($exp, $string) ? true : false;
}