PHP Code:

$string = "This is the world that we live in.";
$keyword = "world";
if(stristr($item_string , $keyword )) echo"$keyword detected"; 


How can we do that for multiple keywords without creating a loop?

Without a loop, you will simply have to check each keyword individually. I would suggest dropping the entire functionality to a function so it can quickly be re-used.

Thanks Kyrnt.

I was hoping php had a function that would do this!

Oh Well!

use a regular expression

PHP Code:

if (preg_match("[word1|word2]","this has  word1 or word2 in it")) {
    echo "Detected";
    } else {
    echo "Not Detected";
} 


this will show "Detected" if one or the other (or both) words in the pattern are matched.