mysqli_stmt::store_result

    mysqli_stmt_store_result

    (PHP 5, PHP 7, PHP 8)

    mysqli_stmt::store_result -- mysqli_stmt_store_result — Speichert eine Ergebnismenge in einem internen Puffer

    Beschreibung

    Objektorientierter Stil

    public mysqli_stmt::store_result(): bool

    Prozeduraler Stil

    mysqli_stmt_store_result(mysqli_stmt $statement): bool

    Diese Funktion sollte nur aufgerufen werden, wenn die Abfrage eine gültige Ergebnismenge zurückgibt (z. B. SELECT, SHOW, DESCRIBE, EXPLAIN) und die komplette Ergebnismenge gepuffert werden muss. Jeder nachfolgende Aufruf von mysqli_stmt_fetch() liefert dann Daten aus dem Puffer.

    Hinweis:

    Es ist unnötig, mysqli_stmt_store_result() für andere Abfragen aufzurufen. Aber in keinem Fall schadet es oder benötigt merklich Laufzeit. Ob eine Abfrage eine Ergebnismenge zurückgibt, kann festgestellt werden, indem das Ergebnis von mysqli_stmt_result_metadata() auf false geprüft wird.

    Parameter-Liste

    statement

    Nur bei prozeduralem Aufruf: ein von mysqli_stmt_init() zurückgegebenes mysqli_stmt-Objekt.

    Rückgabewerte

    Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben.

    Fehler/Exceptions

    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.

    Beispiele

    Beispiel #1 Objektorientierter Stil

    <?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 LIMIT 20";
    $stmt = $mysqli->prepare($query);
    $stmt->execute();

    /* Das Ergebnis im internen Puffer speichern */
    $stmt->store_result();

    printf("Die Anzahl der Datensätze: %d.\n", $stmt->num_rows);

    Beispiel #2 Prozeduraler Stil

    <?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 LIMIT 20";
    $stmt = mysqli_prepare($link, $query);
    mysqli_stmt_execute($stmt);

    /* Das Ergebnis im internen Puffer speichern */
    mysqli_stmt_store_result($stmt);

    printf("Die Anzahl der Datensätze: %d.\n", mysqli_stmt_num_rows($stmt));

    Die obigen Bespiele erzeugen folgende Ausgabe:

    Die Anzahl der Datensätze: 20.

    Siehe auch

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    User Contributed Notes 4 notes

    up
    14
    kitlum AT ukr DOT net
    10 years ago
    Lost some hours to find out how to save multirows result of mysqli_stmt to array, when get_result prohibited.
    Idea, which works is using store_result
    $stmt=$this->mysqli->prepare("SELECT surname, name, user_id, last_m_own, last_m_str, role FROM users WHERE referer_id=(?)");
    $stmt->bind_param('i',$referer_id);
    $stmt->execute();
    $stmt->store_result();
    $stmt->bind_result($ans['surname'], $ans['name'], $ans['user_id'], $ans['last_m_own'], $ans['last_m_str'], $ans['role']);
    $j=$stmt->num_rows;
    for ($i=0;$i<$j;$i++){
    $stmt->data_seek($i);
    $stmt->fetch();
    foreach ($ans as $key=>$value){
    $result[$i][$key]=$value;
    }
    }
    Hope will helpful for such newbies as me
    up
    8
    pcc at pccglobal dot com
    15 years ago
    When using prepare to prepare a statement to retrieve LOBs the method order matters.
    Also, method 'store_result()' must be called and be called in correct order.
    Failure to observe this causes PHP/MySQLi to crash or return an erroneous value.
    The proper procedure order is: prepare -> execute -> store_result -> bind -> fetch
    The following applies to a Windows SBS server running IIS/6.0 + PHP 5.2.1
    MySQL server version 5.0.26-community-nt, client version 5.0.51a

    <?php
    $database     = "test" ;
    $table = "test" ;
    $column = "flongblob" ;
    $mysqli = new mysqli("localhost", "root", "<secret_password>", $database);
    // Proper procedure order: prepare -> execute -> store_result -> bind -> fetch
    $stmt = $mysqli->prepare("SELECT `$column` FROM `$table`") ;
    $stmt->execute();
    $stmt->store_result();
    // Fetch a record. Bind the result to a variable called 'value' and fetch.
    $stmt->bind_result($value) ;
    $res = $stmt->fetch() ;
    if(    $res)
    {
    // strlen($value) should have LOB length, not 1 or zero.
    echo "$column data length is " . strlen($value) . " bytes.\n" ;
    }
    else
    {
    echo ((    false !== $res) ? "End of data" : $stmt->error) . "\n" ;
    break ;
    }
    // Fetch another record.
    $res = $stmt->fetch() ;
    if(    $res)
    {
    // strlen($value) should have LOB length, not 1 or zero.
    echo "$column data length is " . strlen($value) . " bytes.\n" ;
    }
    else
    {
    echo ((    false !== $res) ? "End of data" : $stmt->error) . "\n" ;
    break ;
    }
    $stmt->close() ;
    $mysqli->close() ;
    exit ;
    ?>

    The above example should output:
    flongblob data length is 932353 bytes.
    flongblob data length is 867300 bytes.

    If wrong procedure order MySQLi crashes or outputs:
    flongblob data length is 0 bytes.
    flongblob data length is 867300 bytes.
    up
    2
    UCFirefly (at) yahoo.com
    19 years ago
    fetch_fields() does not seem to be compatible with prepared statements like those used here. Makes things difficult if you're using a wildcard. I guess that's better for security in some obscure way.
    up
    0
    Typer85 at gmail dot com
    18 years ago
    In response to the note below me for the claim that mysqli_fetch_fields is not compatible with prepared statements.

    This is untrue, it is but you have to do a little extra work. I would recommend you use a wrapper function of some sort to take care of the dirty business for you but the basic idea is the same.

    Let's assume you have a prepared statement like so. I am going to use the procedural way for simplicity but the same idea can be done using the object oriented way:

    <?php

    // Connect Blah Blah Blah.

    $connectionLink = mysqli_connect( .... );

    // Query Blab Blah Blah.

    $query = "Select `Id` From `Table` Where `Id` = ?";

    // Prepare Query.

    $prepareObject = mysqli_prepare( $connectionLink , $query );

    // Bind Query.

    mysqli_stmt_bind_param( $prepareObject , 'i' , 1 );

    // Execute Query.

    mysqli_stmt_execute( $prepareObject );

    ?>

    Now all the above is fine and dandy to anyone familiar with using prepared statements, but if I want to use mysqli_fetch_fields or any other function that fetches meta information about a result set but does not work on prepared statements?

    Enter the special function mysqli_stmt_result_metadata. It can be used as follows, assume the following code segment immediatley follows that of the above code segment.

    <?php

    $metaData     = mysqli_stmt_result_metadata( $prepareObject );

    // I Can Now Call mysqli_fetch_fields using the variable
    // $metaData as an argument.

    $fieldInfo = mysqli_fetch_fields( $metaData );

    // Or Even This.

    $fieldInfo = mysqli_num_fields( $metaData );

    ?>

    Take a look at the Manual entry for mysqli_stmt_result_metatdata function for full details on how to expose it with prepared statements.

    Good Luck,
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