mysqli_stmt::prepare

    mysqli_stmt_prepare

    (PHP 5, PHP 7, PHP 8)

    mysqli_stmt::prepare -- mysqli_stmt_prepare — Prepares an SQL statement for execution

    Açıklama

    Nesne yönelimli kullanım

    publicmysqli_stmt::prepare(string$query): bool

    Yordamsal kullanım

    mysqli_stmt_prepare(mysqli_stmt$statement, string$query): bool

    Prepares a statement for execution. The query must consist of a single SQL statement.

    The statement template can contain zero or more question mark (?) parameter markers⁠—also called placeholders. The parameter markers must be bound to application variables using mysqli_stmt_bind_param() before executing the statement.

    Bilginize:

    In the case where a statement is passed to mysqli_stmt_prepare() that is longer than max_allowed_packet of the server, the returned error codes are different depending on whether you are using MySQL Native Driver (mysqlnd) or MySQL Client Library (libmysqlclient). The behavior is as follows:

    • mysqlnd on Linux returns an error code of 1153. The error message means got a packet bigger than max_allowed_packet bytes.

    • mysqlnd on Windows returns an error code 2006. This error message means server has gone away.

    • libmysqlclient on all platforms returns an error code 2006. This error message means server has gone away.

    Bağımsız Değişkenler

    deyim

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

    query

    The query, as a string. It must consist of a single SQL statement.

    The SQL statement may contain zero or more parameter markers represented by question mark (?) characters at the appropriate positions.

    Bilginize:

    The markers are legal only in certain places in SQL statements. For example, they are permitted in the VALUES() list of an INSERT statement (to specify column values for a row), or in a comparison with a column in a WHERE clause to specify a comparison value. However, they are not permitted for identifiers (such as table or column names).

    Dönen Değerler

    Başarı durumunda true, başarısızlık durumunda false döner.

    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_stmt::prepare() example

    Nesne yönelimli kullanım

    <?php

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

    $city = "Amersfoort";


    $stmt = $mysqli->stmt_init();
    $stmt->prepare("SELECT District FROM City WHERE Name=?");


    $stmt->bind_param("s", $city);


    $stmt->execute();


    $stmt->bind_result($district);


    $stmt->fetch();

    printf("%s is in district %s\n", $city, $district);

    Yordamsal kullanım

    <?php

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

    $city = "Amersfoort";


    $stmt = mysqli_stmt_init($link);
    mysqli_stmt_prepare($stmt, "SELECT District FROM City WHERE Name=?");


    mysqli_stmt_bind_param($stmt, "s", $city);


    mysqli_stmt_execute($stmt);


    mysqli_stmt_bind_result($stmt, $district);


    mysqli_stmt_fetch($stmt);

    printf("%s is in district %s\n", $city, $district);

    Yukarıdaki örneklerin çıktısı:

    Amersfoort is in district Utrecht

    Ayrıca Bakınız

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