Control Structure Error

Here is the code that I am trying to use: //code start function search_terms($title) { $array = explode (" ", $title); for($i=0,$n=count($array); $i<$n; $i++) { $returned_string = $returned_string . $array[$i] . " OR "; } return $returned_string } //code end I want it to turn the string of words stored in $title into an array ($array), then use the for structure to insert the string " OR " in between each word, and then finally return the string ($returned_string) for DB purposes.