how to scan through a string of character with PHP

[eluser]ebot[/eluser]
hello all i need help, i will like any one to help on how to scan through a text or string of characters with code igniter and compare to a word store in the database.
thanks for the help

[eluser]alanphil[/eluser]
I would recommend that you read about the Database class in the user guide. Lots of good examples on how to do this. You don't provide enough information on what exactly you are trying to do, but one possible solution might use the following:

$this->db->like();

Or you might want to use a Regular Expression? Provide more detail about your problem and the forum can provide a better answer.

Alan