mysqli_stmt_affected_rows

(PHP 5)

mysqli_stmt_affected_rows

mysqli_stmt->affected_rows - Возвращает общее количество строк, которые изменены, удалены или добавлены последним SQL запросом.

Процедурный стиль вызова:

int mysqli_stmt_affected_rows ( mysqli_stmt stmt )

Объектно-ориентированный стиль вызова (свойство):

class mysqli_stmt {
int affected_rows
}

mysqli_stmt_affected_rows() returns the number of rows affected by INSERT, UPDATE, or DELETE query. Если последний запрос ошибочный, функция возвращает -1.

The mysqli_stmt_affected_rows() function only works with queries which update a table. In order to return the number of rows from a SELECT query, use the mysqli_stmt_num_rows() function instead.

Возвращаемые значения

An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records where updated for an UPDATE/DELETE statement, no rows matched the WHERE clause in the query or that no query has yet been executed. -1 indicates that the query has returned an error.

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

Примеры

Пример 1. Объектно-ориентированный стиль вызова

$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* create temp table */
$mysqli->query("CREATE TEMPORARY TABLE myCountry LIKE Country");

$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";

/* prepare statement */
if ($stmt = $mysqli->prepare($query)) {

    /* Bind variable for placeholder */
    $code = 'A%';
    $stmt->bind_param("s", $code);
    
    /* execute statement */
    $stmt->execute();

    printf("rows inserted: %d\n", $stmt->affected_rows);

    /* close statement */
    $stmt->close();
}

/* close connection */
$mysqli->close();

Пример 2. Процедурный стиль вызова

$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* create temp table */
mysqli_query($link, "CREATE TEMPORARY TABLE myCountry LIKE Country");

$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";

/* prepare statement */
if ($stmt = mysqli_prepare($link, $query)) {

    /* Bind variable for placeholder */
    $code = 'A%';
    mysqli_stmt_bind_param($stmt, "s", $code);
    
    /* execute statement */
    mysqli_stmt_execute($stmt);

    printf("rows inserted: %d\n", mysqli_stmt_affected_rows($stmt));

    /* close statement */
    mysqli_stmt_close($stmt);
}

/* close connection */
mysqli_close($link);

Результат выполнения данного примера:

rows inserted: 17

Смотрите также: mysqli_stmt_num_rows() и mysqli_prepare().

Все функции mysql
Описание на ru2.php.net
Описание на php.ru