mysqli::use_result

    mysqli_use_result

    (PHP 5, PHP 7, PHP 8)

    mysqli::use_result -- mysqli_use_result — Initiate a result set retrieval

    Açıklama

    Nesne yönelimli kullanım

    publicmysqli::use_result(): mysqli_result|false

    Yordamsal kullanım

    mysqli_use_result(mysqli$mysql): mysqli_result|false

    Used to initiate the retrieval of a result set from the last query executed using the mysqli_real_query() function on the database connection.

    Either this or the mysqli_store_result() function must be called before the results of a query can be retrieved, and one or the other must be called to prevent the next query on that database connection from failing.

    Bilginize:

    The mysqli_use_result() function does not transfer the entire result set from the database and hence cannot be used functions such as mysqli_data_seek() to move to a particular row within the set. To use this functionality, the result set must be stored using mysqli_store_result(). One should not use mysqli_use_result() if a lot of processing on the client side is performed, since this will tie up the server and prevent other threads from updating any tables from which the data is being fetched.

    Bağımsız Değişkenler

    Bu işlevin bağımsız değişkeni yoktur.

    Dönen Değerler

    Returns an unbuffered result object or false if an error occurred.

    Hatalar/İstisnalar

    Eğer mysqli hata bildirimi etkinse (MYSQLI_REPORT_ERROR) ve istenen işlem başarısız olursa bir uyarı üretilir. Ek olarak, kip MYSQLI_REPORT_STRICT ise bunun yerine mysqli_sql_exception istisnası oluşur.

    Örnekler

    Örnek 1 mysqli::use_result() example

    Nesne yönelimli kullanım

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


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

    $query = "SELECT CURRENT_USER();";
    $query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";


    if ($mysqli->multi_query($query)) {
    do {

    if ($result = $mysqli->use_result()) {
    while (    $row = $result->fetch_row()) {
    printf("%s\n", $row[0]);
    }
    $result->close();
    }

    if ($mysqli->more_results()) {
    printf("-----------------\n");
    }
    } while (    $mysqli->next_result());
    }


    $mysqli->close();
    ?>

    Yordamsal kullanım

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


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

    $query = "SELECT CURRENT_USER();";
    $query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";


    if (mysqli_multi_query($link, $query)) {
    do {

    if ($result = mysqli_use_result($link)) {
    while (    $row = mysqli_fetch_row($result)) {
    printf("%s\n", $row[0]);
    }
    mysqli_free_result($result);
    }

    if (mysqli_more_results($link)) {
    printf("-----------------\n");
    }
    } while (    mysqli_next_result($link));
    }


    mysqli_close($link);
    ?>

    Yukarıdaki örneklerin çıktısı:

    my_user@localhost ----------------- Amersfoort Maastricht Dordrecht Leiden Haarlemmermeer

    Ayrıca Bakınız

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