Add an item to SQL and get auto incrementing id back immediately

I'm using the following code to add a entry to my SQL database.

$RQ1_string = "INSERT INTO automotive_RQ01_Information VALUES(NULL,'".$title."','".$description."')";
$RQ1_result = mysql_query($RQ1_string);

In the next line I need to use the value of the auto-incrementing ID开发者_开发问答(The NULL entry).

How can I get the ID from RQ1_result?

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You would use mysql_insert_id(). This can be assigned to a variable or outputted directly.

http://www.php.net/manual/en/function.mysql-insert-id.php