mysqli_stmt::fetch

    mysqli_stmt_fetch

    (PHP 5, PHP 7, PHP 8)

    mysqli_stmt::fetch -- mysqli_stmt_fetch — Fetch results from a prepared statement into the bound variables

    说明

    面向对象风格

    publicmysqli_stmt::fetch(): ?bool

    过程化风格

    mysqli_stmt_fetch(mysqli_stmt$statement): ?bool

    Fetch the result from a prepared statement into the variables bound by mysqli_stmt_bind_result().

    注意:

    Note that all columns must be bound by the application before calling mysqli_stmt_fetch().

    注意:

    Data are transferred unbuffered without calling mysqli_stmt_store_result() which can decrease performance (but reduces memory cost).

    参数

    statement

    仅以过程化样式：由 mysqli_stmt_init() 返回的 mysqli_stmt 对象。

    返回值

    返回值
    ValueDescription
    trueSuccess. Data has been fetched
    falseError occurred
    nullNo more rows/data exists or data truncation occurred

    错误／异常

    If mysqli error reporting is enabled (MYSQLI_REPORT_ERROR) and the requested operation fails, a warning is generated. If, in addition, the mode is set to MYSQLI_REPORT_STRICT, a mysqli_sql_exception is thrown instead.

    示例

    示例 #1 面向对象风格

    <?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 Name, CountryCode FROM City ORDER by ID DESC LIMIT 150,5";

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


    $stmt->execute();


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


    while ($stmt->fetch()) {
    printf ("%s (%s)\n", $name, $code);
    }


    $stmt->close();
    }


    $mysqli->close();
    ?>

    示例 #2 过程化风格

    <?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 Name, CountryCode FROM City ORDER by ID DESC LIMIT 150,5";

    if (    $stmt = mysqli_prepare($link, $query)) {


    mysqli_stmt_execute($stmt);


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


    while (mysqli_stmt_fetch($stmt)) {
    printf ("%s (%s)\n", $name, $code);
    }


    mysqli_stmt_close($stmt);
    }


    mysqli_close($link);
    ?>

    以上示例会输出：

    Rockford (USA) Tallahassee (USA) Salinas (USA) Santa Clarita (USA) Springfield (USA)

    参见

    To Top