Is there a way to do an “INSERT…ON DUPLICATE KEY UPDATE” in Zend Framework 1.5?

I worked for Zend and specifically worked on Zend_Db quite a bit.

No, there is no API support for the ON DUPLICATE KEY UPDATE syntax. For this case, you must simply use query() and form the complete SQL statement yourself.

I do not recommend interpolating values into the SQL as harvejs shows. Use query parameters.

Edit: You can avoid repeating the parameters by using VALUES() expressions.

$sql = "INSERT INTO sometable (id, col2, col3) VALUES (:id, :col2, :col3)
  ON DUPLICATE KEY UPDATE col2 = VALUES(col2), col3 = VALUES(col3)";

$values = array("id"=>1, "col2"=>327, "col3"=>"active");