mysql_insert_id

(PHP 4, PHP 5, PECL mysql:1.0)

mysql_insert_id — Get the ID generated from the previous INSERT operation

Popis

int mysql_insert_id ([ resource $link_identifier ] )

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

Parametre

link_identifier: Pripojenie k MySQL. Ak link identifier nie je zadaný, predpokladá sa posledné spojenie otvorené s mysql_connect(). Ak také spojenie nie je nájdené, pokúsi sa jedno vytvoriť ako keby bolo volané mysql_connect() bez argumentov. Ak sa náhodou nájde pripojenie, alebo je vytvorené, je vygenerované varovanie úrovne E_WARNING.

Vrátené hodnoty

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

Príklady

Example#1 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());
?>

Poznámky

Caution

mysql_insert_id() converts 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, the value returned by mysql_insert_id() will be incorrect. Instead, use the internal MySQL SQL function LAST_INSERT_ID() in an SQL query.

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

Tiež pozri