PHP mysqli_insert_id() Function
Definition
The mysqli_insert_id() function returns the id (generated with AUTO_INCREMENT) used in the last query.
Syntax
Object oriented style
mixed $mysqli->insert_id;
Procedural style
mixed mysqli_insert_id ( mysqli $link )
Parameter
| Parameter | Is Required Description | |
|---|---|---|
| connection | Required. | MySQL connection to use |
Return
It returns an the value of AUTO_INCREMENT field updated by the last query.
It returns zero if there were no update or no AUTO_INCREMENT field.
Example
The Employee table has an auto-generated id field. The following code gets the id used in the last query.
<?php/*w w w . ja v a2s . c o m*/
$con=mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno($con)){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_query($con,"INSERT INTO Employee (name) VALUES('PHP')");
// Print auto-generated id
echo "New record has id: " . mysqli_insert_id($con);
mysqli_close($con);
?>
Example 2
<?php/*from w w w .j a v a2 s .c o m*/
$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 (name)VALUES ('New York')";
$mysqli->query($query);
printf ("New Record has id %d.\n", $mysqli->insert_id);
$mysqli->query("DROP TABLE myCity");
$mysqli->close();
?>