PHP 5.3: mysqli_multi_query and “commands out of sync” errors

问题

When I use mysqli_multi_query() with a mass INSERT query, then after the query has run do another query using mysqli_query('SELECT...'), I get "commands out of sync" errors. Does anyone know why this happens?

回答1:

You've to call mysqli_use_result (or mysqli_store_result) after a mysqli_multi_query() call.

Lower level documentation about this error: http://dev.mysql.com/doc/refman/5.1/en/commands-out-of-sync.html

回答2:

Use mysqli_next_result($db) , after freeing the result set if any . This alone would fix the out of sync issues.

来源：https://stackoverflow.com/questions/3927068/php-5-3-mysqli-multi-query-and-commands-out-of-sync-errors