Run MySQL INSERT Query multiple times (insert values into multiple tables)

Question

basically, I have 3 tables; users and projects, then I have \'users_projects\' to allow the one-to-many formation. When a user adds a project, I need the project information st

Answer 1

You seem to be trying to execute mysql_query() only once. You have two queries, so it needs to be used twice, once on each query:

$sql = "INSERT INTO projects (projectid, projectname, projectdeadline, projectdetails) VALUES
   ('{$projectid}','{$projectname}','{$projectdeadline}','{$projectdetails}')";
$result = mysql_query($sql, $connection)
    or die("MySQL Error: ".mysql_error());

$sql =  "INSERT INTO usersprojects (userid, projectid) VALUES
   ('{$userid}','{$projectid}')";
$result = mysql_query($sql, $connection)
    or die("MySQL Error: ".mysql_error());

Alternatively, you could use mysqli_multi_query(), but that might require a significant rewrite of your code to use the mysqli interface.