Submit a Pull Request Report a Bug

    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

    Descrição

    Estilo orientado a objetos

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

    Estilo procedural

    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().

    Parâmetros

    statement

    Somente no estilo procedural: Um objeto mysqli_stmt retornado por mysqli_stmt_init().

    offset

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

    Valor Retornado

    Nenhum valor é retornado.

    Exemplos

    Exemplo #1 Estilo orientado a objetos

    <?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);

    Exemplo #2 Estilo procedural

    <?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);

    Os exemplos acima produzirão:

    City: Benin City  Countrycode: NGA

    Veja Também

    ＋add a note

    User Contributed Notes 1 note

    up
    1
    phpnet at stuffonmylaptop dot com
    11 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());
    }
    ＋add a note
    To Top