Returns the auto generated ID of the last insert query that successfully executed on this connection

# db2_last_insert_id

(PECL ibm_db2 >= 1.7.1)

db2_last_insert_id — Returns the auto generated ID of the last insert query that successfully executed on this connection

### 说明

function db2_last_insert_id(resource `$resource`): ?string

Returns the auto generated ID of the last insert query that successfully executed on this connection.

The result of this function is not affected by any of the following:

- A single row INSERT statement with a VALUES clause for a table without an identity column.
- A multiple row INSERT statement with a VALUES clause.
- An INSERT statement with a fullselect.
- A ROLLBACK TO SAVEPOINT statement.

### 参数

`resource`
  A valid connection resource as returned from db2_connect() or db2_pconnect(). The value of this parameter cannot be a statement resource or result set resource.

### 返回值

Returns the auto generated ID of last insert query that successfully executed on this connection.

### 示例

示例 #1 A db2_last_insert_id() example

The following example shows how to return the auto generated ID of last insert query that successfully executed on this connection.

    <?php

    $database = "SAMPLE";
    $user = "db2inst1";
    $password = "ibmdb2";

    $conn = db2_connect($database, $user, $password);
    if($conn) {
        $createTable = "CREATE TABLE lastInsertID
          (id integer GENERATED BY DEFAULT AS IDENTITY, name varchar(20))";
        $insertTable = "INSERT INTO lastInsertID (name) VALUES ('Temp Name')";

        $stmt = @db2_exec($conn, $createTable);

        /* Checking for single row inserted. */
        $stmt = db2_exec($conn, $insertTable);
        $ret =  db2_last_insert_id($conn);
        if($ret) {
            echo "Last Insert ID is : " . $ret . "\n";
        } else {
            echo "No Last insert ID.\n";
        }

        db2_close($conn);
    }
    else {
        echo "Connection failed.";
    }
    ?>

以上示例会输出：

    Last Insert ID is : 1

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