Copyright 1997-2012 the PHP Documentation Group.
mysqli::$insert_id
mysqli_insert_id
Returns the auto generated id used in the last query
Description
Object oriented style
mixed mysqli->insert_id ;Procedural style
mixed mysqli_insert_id(mysqli link);
The
mysqli_insert_id
function returns the ID generated by a query on a table with a
column having the AUTO_INCREMENT attribute. If the last query
wasn't an INSERT or UPDATE statement or if the modified
table does not have a column with the AUTO_INCREMENT attribute,
this function will return zero.
Performing an INSERT or UPDATE statement using the
LAST_INSERT_ID() function will also modify the value returned
by the
mysqli_insert_id
function.
Parameters
link
Procedural style only: A link identifier returned by
mysqli_connect
or
mysqli_init
Return Values
The value of the AUTO_INCREMENT field that
was updated by the previous query. Returns zero if there was no
previous query on the connection or if the query did not update
an AUTO_INCREMENT value.
If the number is greater than maximal int value,
mysqli_insert_id
will return a string.
Examples
Example 3.55. $mysqli->insert_id example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("CREATE TABLE myCity LIKE City");
$query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)";
$mysqli->query($query);
printf ("New Record has id %d.\n", $mysqli->insert_id);
/* drop table */
$mysqli->query("DROP TABLE myCity");
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
mysqli_query($link, "CREATE TABLE myCity LIKE City");
$query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)";
mysqli_query($link, $query);
printf ("New Record has id %d.\n", mysqli_insert_id($link));
/* drop table */
mysqli_query($link, "DROP TABLE myCity");
/* close connection */
mysqli_close($link);
?>
The above examples will output:
New Record has id 1.

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