mysqli_stmt::store_result

    mysqli_stmt_store_result

    (PHP 5, PHP 7, PHP 8)

    mysqli_stmt::store_result -- mysqli_stmt_store_result — Almacena un conjunto de resultados en un búfer interno

    Descripción

    Estilo orientado a objetos

    public mysqli_stmt::store_result(): bool

    Estilo por procedimientos

    mysqli_stmt_store_result(mysqli_stmt $statement): bool

    Esta función debería ser llamada para consultas que produzcan un conjunto de resultados (por ejemplo, SELECT, SHOW, DESCRIBE, EXPLAIN) solo si el conjunto de resultados completo debe ser almacenado en búfer por PHP. Cada llamada sucesiva a mysqli_stmt_fetch() devolverá los datos almacenados en búfer.

    Nota:

    No es necesario llamar a mysqli_stmt_store_result() para otros tipos de consultas, pero si se hace, no hay problema y no causará ninguna pérdida notable de rendimiento en ningún caso. Puede detectarse en todos los casos si la consulta va a producir un conjunto de resultados observando si la función mysqli_stmt_result_metadata() devuelve false.

    Parámetros

    stmt

    Sólo estilo por procediminetos: Un identificador de declaraciones devuelto por mysqli_stmt_init().

    Valores devueltos

    Devuelve true en caso de éxito o false en caso de error.

    Errores/Excepciones

    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.

    Ejemplos

    Ejemplo #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 LIMIT 20";
    $stmt = $mysqli->prepare($query);
    $stmt->execute();

    /* Almacenar el resultado en un búfer interno */
    $stmt->store_result();

    printf("Número de filas: %d.\n", $stmt->num_rows);

    Ejemplo #2 Estilo por procedimientos

    <?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);

    /* Almacenar el resultado en un búfer interno */
    mysqli_stmt_store_result($stmt);

    printf("Número de filas: %d.\n", mysqli_stmt_num_rows($stmt));

    El resultado de los ejemplos sería:

    Número de filas: 20.

    Ver también

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    User Contributed Notes 5 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
    14 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
    4
    neromir at hotmail dot com
    16 years ago
    The wording above, in the initial description of the function, can be confusing (quoted below).

    "You must call mysqli_stmt_store_result() for every query that successfully produces a result set (SELECT, SHOW, DESCRIBE, EXPLAIN), and only if you want to buffer the complete result set by the client, so that the subsequent mysqli_stmt_fetch() call returns buffered data. "

    I had initially understood the part saying "and only if you want to buffer..." to mean that it was only necessary to call this function if you wanted to buffer the result set. This, however, is not the case, and the misunderstanding caused me quite a bit of grief.

    So, to clarify for anyone suffering from the same misunderstanding, you ALWAYS must call this function for every query that produces a result set (as listed in the parentheses of the quote above), as far as I can tell.
    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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