检查字符串是否包含数组中的单词

I have a script below that detects for words in my word filter (an array), and determines whether a string is clean or not.

What I have below works well when the words are used with spacing. But ifiwritesomething without spaces, it doesn't detect.

How can I make it such that it searches the whole string instead of words? I tried removing the explode function but I got some errors...

$string = 'goodmorningnoobs';
$array = array("idiot","noob");
if(0 == count(array_intersect(array_map('strtolower', explode(' ', $string)), $array))){

echo"clean";

} else {

echo "unclean";

}

Can anyone help?

$clean = true;

foreach ( $array as $word ) {
    if ( stripos($string, $word) !== false ) {
        $clean = false;
        break;
    }
}

echo $clean ? 'clean' : 'unclean';

How about?

$hasWords = preg_match('/'. implode('|', $words) .'/', $string);

echo $hasWords ? 'unclean' : 'clean';