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[, ... ] */) { // SQL statement $sql = func_get_arg(0); // parameters, if any $parameters = array_slice(func_get_args(), 1); // try to connect to database static $handle; … ; } // execute SQL statement $results = $statement->execute($parameters); // return result set's rows, if any if ($results ! …

as far as I know, they would return the same result in this case, but the second query may execute faster because it compares the values directly while the first would supposedly do pattern-matching ( …

If you look at the code for query (I replaced the irrelevant parts with comments for the sake of shortness) function query(/* $sql [, ... ] */) { // SQL statement $sql = func_get_arg(0); … SQL statement. …

I think the professor was referring to the process of updating when he analogized this to a SELECT query and an INSERT query at the same time, because that's probably how you'd probably do an update m …

According to the docs: You can use the VALUES(col_name) function in the UPDATE clause to refer to column values from the INSERT portion of the INSERT ... ON DUPLICATE KEY UPDATE statement. In ot …

recall that, assuming the query is syntactically correct, query returns an array of the resulting rows (if any) or an empty array otherwise. try print_r'ing $comment to learn about the structure of th …