Podręcznik PHP
Poprzedni |  | Następny

# mysqli_affected_rows

(PHP 5)

mysqli_affected_rows

(no version information, might be only in CVS)

mysqli->affected_rows -- Gets the number of affected rows in a previous MySQL operation

## Opis

Procedural style:

int mysqli_affected_rows ( mysqli link )

Object oriented style (property):

class mysqli {
int affected_rows
}

Returns the number of rows affected by the last `INSERT`, `UPDATE`, `REPLACE` or `DELETE` query.

This function only works with queries which modify a table. In order to return the number of rows from a `SELECT` query, use the mysqli_num_rows() function instead.

## Parametry

`link`

  Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

## Zwracane wartości

An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records where 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.

> Notatka: If the number of affected rows is greater than maximal int value, the number of affected rows will be returned as a string.

## Przykłady

Przykład 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();
}
/* 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();
?>`

Przykład 2. 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);
?>`

Powyższy przykład wyświetli:

    Affected rows (INSERT): 984
    Affected rows (UPDATE): 168
    Affected rows (DELETE): 815
    Affected rows (SELECT): 169

## Patrz także

mysqli_num_rows()
mysqli_info()

Poprzedni | Spis treści | Następny
Ulepszone rozszerzenie MySQL | Początek rozdziału | mysqli_autocommit