mysqli_stmt::data_seek

    mysqli_stmt_data_seek

    (PHP 5, PHP 7, PHP 8)

    mysqli_stmt::data_seek -- mysqli_stmt_data_seek — Adjusts the result pointer to an arbitrary row in the buffered result

    Açıklama

    Nesne yönelimli kullanım

    public mysqli_stmt::data_seek(int $offset): void

    Yordamsal kullanım

    mysqli_stmt_data_seek(mysqli_stmt $statement, int $offset): void

    This function moves the result set pointer of the buffered result set to an arbitrary row specified by the offset parameter.

    This function works only on the buffered internal result set. mysqli_stmt_store_result() must be called prior to mysqli_stmt_data_seek().

    Bağımsız Değişkenler

    deyim

    Sadece yordamsal tarz: mysqli_stmt_init() işlevinden dönen bir mysqli_stmt nesnesi.

    offset

    Must be between zero and the total number of rows minus one (0.. mysqli_stmt_num_rows() - 1).

    Dönen Değerler

    Hiçbir değer dönmez.

    Örnekler

    Örnek 1 Nesne yönelimli kullanım

    <?php

    mysqli_report    (MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
    $mysqli = new mysqli("localhost", "my_user", "my_password", "world");

    $query = "SELECT Name, CountryCode FROM City ORDER BY Name";
    $stmt = $mysqli->prepare($query);
    $stmt->execute();

    $stmt->bind_result($name, $code);

    $stmt->store_result();

    /* seek to row no. 400 */
    $stmt->data_seek(399);

    $stmt->fetch();

    printf("City: %s Countrycode: %s\n", $name, $code);

    Örnek 2 Yordamsal kullanım

    <?php

    mysqli_report    (MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
    $link = mysqli_connect("localhost", "my_user", "my_password", "world");

    $query = "SELECT Name, CountryCode FROM City ORDER BY Name";
    $stmt = mysqli_prepare($link, $query);

    mysqli_stmt_execute($stmt);

    mysqli_stmt_bind_result($stmt, $name, $code);

    mysqli_stmt_store_result($stmt);

    /* seek to row no. 400 */
    mysqli_stmt_data_seek($stmt, 399);

    mysqli_stmt_fetch($stmt);

    printf("City: %s Countrycode: %s\n", $name, $code);

    Yukarıdaki örneklerin çıktısı:

    City: Benin City  Countrycode: NGA

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    User Contributed Notes 1 note

    up
    1
    phpnet at stuffonmylaptop dot com
    12 years ago
    Although the documentation says you must provide a number between 0 and count - 1, you can actually supply a negative number, which appears to be cast to positive (such as in abs()).

    For example:

    <?php
    $db     = new mysqli('localhost', 'test', 'password', 'schema');
    $db->multi_query("
    SELECT * FROM
    (
    SELECT 1 as 'position'
    UNION SELECT 2 as 'position'
    UNION SELECT 3 as 'position'
    UNION SELECT 4 as 'position'
    UNION SELECT 5 as 'position'
    ) as rows"    );

    $result = $db->store_result();

    for (    $i = 0; $i < $result->num_rows; $i++)
    {
    $offset = $i;
    $result->data_seek($offset);
    var_dump("Seek offset is: {$offset}", $result->fetch_object());
    }

    for (    $i = 0; $i < $result->num_rows; $i++)
    {
    $offset = -$i;
    $result->data_seek($offset);
    var_dump("Seek offset is: {$offset}", $result->fetch_object());
    }
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