How do i create a php search engine which allows the user to input few words ?

[jd2007]

i created a search engine but it can only search one word... How do i create a php search engine which allows the user to input multiple words  ?

[xyn]

preg_match()

[jd2007]

how do i search for it on a database ?

[Wuhtzu]

"SELECT * FROM table WHERE field LIKE %$word1% or %$word2% or %$word3%"