`mysql_insert_id`

mysql_insert_id
Get the ID generated in the last query

Description

int mysql_insert_id(resource link_identifier= =NULL);

Retrieves the ID generated for an AUTO_INCREMENT column by the previous query (usually INSERT).

Parameters

link_identifier: The MariaDB connection. If the link identifier is not specified, the last link opened by mysql_connect is assumed. If no such link is found, it will try to create one as if mysql_connect was called with no arguments. If no connection is found or established, an E_WARNING level error is generated.

Return Values

The ID generated for an AUTO_INCREMENT column by the previous query on success, 0 if the previous query does not generate an AUTO_INCREMENT value, or FALSE if no MariaDB connection was established.

Examples

Example 20.52. mysql_insert_id example

<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
 die('Could not connect: ' . mysql_error());
}
mysql_select_db('mydb');
mysql_query('INSERT INTO mytable (product) values ('kossu')');
printf('Last inserted record has id %d\n', mysql_insert_id());
?>

Notes

Caution

mysql_insert_id will convert the return type of the native MariaDB C API function mysql_insert_id() to a type of long (named int in PHP). If your AUTO_INCREMENT column has a column type of BIGINT (64 bits) the conversion may result in an incorrect value. Instead, use the internal MariaDB SQL function LAST_INSERT_ID() in an SQL query. For more information about PHP's maximum integer values, please see the integer documentation.Note

Because mysql_insert_id acts on the last performed query, be sure to call mysql_insert_id immediately after the query that generates the value.Note

The value of the MariaDB SQL function LAST_INSERT_ID() always contains the most recently generated AUTO_INCREMENT value, and is not reset between queries.