Php/docs/mysqli.affected-rows
mysqli::$affected_rows
mysqli_affected_rows
(PHP 5, PHP 7)
mysqli::$affected_rows -- mysqli_affected_rows — Gets the number of affected rows in a previous MySQL operation
Description
Object oriented style
int $mysqli->affected_rows
;
Procedural style
mysqli_affected_rows
( mysqli $link
) : int
Returns the number of rows affected by the last INSERT
,
UPDATE
, REPLACE
or
DELETE
query.
For SELECT statements mysqli_affected_rows() works like mysqli_num_rows().
Parameters
link
- Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()
Return Values
An integer greater than zero indicates the number of rows affected or
retrieved.
Zero indicates that no records were updated for an UPDATE statement, no
rows matched the WHERE
clause in the query or that no
query has yet been executed. -1 indicates that the query returned an
error.
Note:
If the number of affected rows is greater than the maximum integer value(
PHP_INT_MAX
), the number of affected rows will be returned as a string.
Examples
Example #1 $mysqli->affected_rows
example
Object oriented style
<?php$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* check connection */if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit();}/* Insert rows */$mysqli->query("CREATE TABLE Language SELECT * from CountryLanguage");printf("Affected rows (INSERT): %d\n", $mysqli->affected_rows);$mysqli->query("ALTER TABLE Language ADD Status int default 0");/* update rows */$mysqli->query("UPDATE Language SET Status=1 WHERE Percentage > 50");printf("Affected rows (UPDATE): %d\n", $mysqli->affected_rows);/* delete rows */$mysqli->query("DELETE FROM Language WHERE Percentage < 50");printf("Affected rows (DELETE): %d\n", $mysqli->affected_rows);/* select all rows */$result = $mysqli->query("SELECT CountryCode FROM Language");printf("Affected rows (SELECT): %d\n", $mysqli->affected_rows);$result->close();/* Delete table Language */$mysqli->query("DROP TABLE Language");/* close connection */$mysqli->close();?>
Procedural style
<?php$link = mysqli_connect("localhost", "my_user", "my_password", "world");if (!$link) { printf("Can't connect to localhost. Error: %s\n", mysqli_connect_error()); exit();}/* Insert rows */mysqli_query($link, "CREATE TABLE Language SELECT * from CountryLanguage");printf("Affected rows (INSERT): %d\n", mysqli_affected_rows($link));mysqli_query($link, "ALTER TABLE Language ADD Status int default 0");/* update rows */mysqli_query($link, "UPDATE Language SET Status=1 WHERE Percentage > 50");printf("Affected rows (UPDATE): %d\n", mysqli_affected_rows($link));/* delete rows */mysqli_query($link, "DELETE FROM Language WHERE Percentage < 50");printf("Affected rows (DELETE): %d\n", mysqli_affected_rows($link));/* select all rows */$result = mysqli_query($link, "SELECT CountryCode FROM Language");printf("Affected rows (SELECT): %d\n", mysqli_affected_rows($link));mysqli_free_result($result);/* Delete table Language */mysqli_query($link, "DROP TABLE Language");/* close connection */mysqli_close($link);?>
The above examples will output:
Affected rows (INSERT): 984 Affected rows (UPDATE): 168 Affected rows (DELETE): 815 Affected rows (SELECT): 169
See Also
- mysqli_num_rows() - Gets the number of rows in a result
- mysqli_info() - Retrieves information about the most recently executed query