searching a database with multiple keywords

[mix_master_mike]

I have a keyword search through articles on my website. If the user enters multiple keywords, what is the best way to search through the database? Should I seperate the keywords into two seperate searches?

Right now I'm using something like this:

$query = "select * from articles where content like '%".$string."%'";

But this obviously fails when the user enters multiple keywords.

Thanks!

[nemonoman]

$query = "
SELECT *
FROM articles
WHERE content LIKE '%".$string1."%'"
OR content LIKE '%".$string2."%'"
OR content LIKE '%".$string3."%'"
OR content LIKE '%".$string4."%'";

[mix_master_mike]

thank you sir :p