PHP SQL builder class: Build and execute MySQL queries from parameters

This is simple class that I use to get user friendly insert/update SQL. 
Instead of 
INSERT INTO (field, field, field, field) VALUES(value, value, value value);

/*
Example:

$SQLbuilder = new SQLbuilder();
$SQLbuilder->setTableName('SQLbuilder');
$SQLbuilder->addField('creator_first_name', 'Goran');
$SQLbuilder->addField('creator_last_name', 'Jordanoski');
$SQLbuilder->addField('creator_email', 'berezitski@gmail.com');
$SQLbuilder->addField('creator_linkedin', 'http://www.linkedin.com/in/berezitski');
$SQLbuilder->addField('creator_occupation', 'outsourcing');
$SQLbuilder->addField('date_entered', 'NOW()', 'not_quoted');

$query = $SQLbuilder->getSQL();