MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysql_insert_id
Get the ID generated in the last query
This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:
mysqli_insert_id
|
PDO::lastInsertId
|
int mysql_insert_id(resource link_identifier= =NULL);
Retrieves the ID generated for an AUTO_INCREMENT column by the previous query (usually INSERT).
link_identifier
The MySQL 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
had been called with no arguments. If no connection is
found or established, an E_WARNING
level error is generated.
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 MySQL connection was
established.
Example 6.38 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()); ?>
mysql_insert_id
will convert the return type of the native MySQL 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 MySQL SQL function LAST_INSERT_ID()
in an SQL query. For more information about PHP's maximum
integer values, please see the
integer
documentation.
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.
The value of the MySQL SQL function
LAST_INSERT_ID()
always contains the most
recently generated AUTO_INCREMENT value, and is not reset
between queries.
mysql_query
|
mysql_info
|