Question

Supposing I am inserting a row into a table in MySql by php code, and my table has an ID which is not given but it is auto_increment – how can I retrieve the ID of the row I just inserted?
My query in php looks like this:

$query = "insert into " . $this->tabel . " values (false,";

And after this I am filling the query with the values given as parameters in my function.
However, I need to update an internal variable of my php class with the current ID. How can I obtain it?

Thank you

public function insert ($keyValueSet) {

    $query = "insert into " . $this->tabel . " values (false,";
    $connection = new mysqli(ADDRESS, USERNAME, PASSWORD, DB);
    $cols = $this->getTableDesc();
    // $query construction ......
    $result = $connection->query($query);
    echo "ID: " . mysql_insert_id ();
    if ($result != 1)
        echo "Exception";
    $connection->close();
}

The incremented field is the first field (where i say: values (false,) and MySql does auto-increment this field, as I saw in the database.

Answer 1

For the default mysql_connect()

$id = mysql_insert_id();

For procedural MySQLi e.g mysqli_connect()

$id = mysqli_insert_id();

For Object Oriented MySQLi e.g. $db = new mysqli()

$id = $db->insertid; // replace $db with your DB variable name