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# PDO::lastInsertId [PHP PDO Reference](#) PDO::lastInsertId — Returns the ID of the last inserted row or the value of a sequence (PHP 5 >= 5.1.0, PECL pdo >= 0.1.0) * * * ## Description ### Syntax string PDO::lastInsertId ([ string $name = NULL ] ) Returns the ID of the last inserted row, or the last value from a sequence object, depending on the underlying driver. For example, PDO_PGSQL() requires the name parameter to be specified for the sequence object. **Note:** This method may not return a meaningful or consistent result across different PDO drivers, because the underlying database may not support the concept of auto-incrementing fields or sequences. * * * ## Parameters **name** The name of the sequence object from which the ID should be returned. * * * ## Return Value If the sequence name parameter is not specified, PDO::lastInsertId() returns a string representing the row ID of the last row inserted into the database. If the sequence name parameter is specified, PDO::lastInsertId() returns a string representing the last value retrieved from the specified sequence object. If the current PDO driver does not support this capability, PDO::lastInsertId() triggers an IM001 SQLSTATE. [PHP PDO Reference](#)