(PHP 5, PHP 7, PHP 8)
mysqli::$insert_id -- mysqli_insert_id — Returns the value generated for an AUTO_INCREMENT column by the last query
Object-oriented style
Procedural style
Returns the ID generated by an INSERT or
UPDATE query on a table with a column having the
AUTO_INCREMENT attribute. In the case of a multiple-row
INSERT statement, it returns the first automatically
generated value that was successfully inserted.
Performing an INSERT or UPDATE
statement using the LAST_INSERT_ID()
MySQL function will also modify the value returned by mysqli_insert_id().
If LAST_INSERT_ID(expr) was used to generate the value of
AUTO_INCREMENT, it returns the value of the last expr
instead of the generated AUTO_INCREMENT value.
Returns 0 if the previous statement did not change an
AUTO_INCREMENT value. mysqli_insert_id() must be
called immediately after the statement that generated the value.
mysqlProcedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()
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.
Only statements issued using the current connection affect the return value. The value is not affected by statements issued using other connections or clients.
Note:
If the number is greater than the maximum int value, it will be returned as a string.
Example #1 $mysqli->insert_id example
Object-oriented style
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
$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");Procedural style
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
mysqli_query($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");The above examples will output:
New record has ID 1.