mysqli_insert_id
(PHP 5)
mysqli_insert_id
(no version information, might be only in CVS)
mysqli->insert_id -- Returns the auto generated id used in the last query
Description
Procedural style:
mixed
mysqli_insert_id ( mysqli link )
Object oriented style (property):
class
mysqli {
mixed insert_id
}
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.
注:
Performing an INSERT or UPDATE statement using the LAST_INSERT_ID()
function will also modify the value returned by the
mysqli_insert_id() function.
返回值
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.
注:
If the number is greater than maximal int value, mysqli_insert_id()
will return a string.
例
例子 1. 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();
?>
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例子 2. 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);
?>
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上例将输出：