PHP - Find if any of the keywords in an array exist in a string

Question

Basically, I have an array of keywords, and a piece of text. I am wondering what would be the best way to find out if any of those keywords are present in the text, bearing in m

Answer 1

Assuming the formatting and only that you care if any (not which) of the keywords exist, you could try something like:

$keywords = array( "dog", "cat" );

// get a valid regex
$test = "(\b".implode( "\b)|(\b", $keywords )."\b)";

if( preg_match( $test, "there is a dog chasing a cat down the road" ) )
    print "keyword hit";