mysqli_result::fetch_column

    mysqli_fetch_column

    (PHP 8 >= 8.1.0)

    mysqli_result::fetch_column -- mysqli_fetch_column — Fetch a single column from the next row of a result set

    Descripción

    Estilo orientado a objetos

    publicmysqli_result::fetch_column(int$column = 0): null|int|float|string|false

    Estilo por procedimientos

    mysqli_fetch_column(mysqli_result$result, int$column = 0): null|int|float|string|false

    Fetches one row of data from the result set and returns the 0-indexed column. Each subsequent call to this function will return the value from the next row within the result set, or false if there are no more rows.

    Nota: Esta función define campos NULOS al valor null de PHP.

    Parámetros

    result

    Sólo estilo por procedimientos: Un conjunto de identificadores de resultados devuelto por mysqli_query(), mysqli_store_result() o mysqli_use_result().

    column

    0-indexed number of the column you wish to retrieve from the row. If no value is supplied, the first column will be returned.

    Valores devueltos

    Returns a single column from the next row of a result set or false if there are no more rows.

    Advertencia

    There is no way to return another column from the same row if you use this function to retrieve data.

    Ejemplos

    Ejemplo #1 mysqli_result::fetch_column() example

    Estilo orientado a objetos

    <?php

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

    $query = "SELECT CountryCode, Name FROM City ORDER BY ID DESC LIMIT 5";

    $result = $mysqli->query($query);


    while ($Name = $result->fetch_column(1)) {
    printf("%s\n", $Name);
    }

    Estilo por procedimientos

    <?php

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

    $query = "SELECT CountryCode, Name FROM City ORDER BY ID DESC LIMIT 5";

    $result = mysqli_query($mysqli, $query);


    while ($Name = mysqli_fetch_column($result, 1)) {
    printf("%s\n", $Name);
    }

    El resultado de los ejemplos sería algo similar a:

    Rafah Nablus Jabaliya Hebron Khan Yunis

    Ver también

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