PHP 7.2.9 Released

mysqli_stmt::get_result

mysqli_stmt_get_result

(PHP 5 >= 5.3.0, PHP 7)

mysqli_stmt::get_result -- mysqli_stmt_get_resultObtiene un conjunto de resultados de una sentencia preparada

Descripción

Estilo orientado a objetos

mysqli_result mysqli_stmt::get_result ( void )

Estilo por procedimientos

mysqli_result mysqli_stmt_get_result ( mysqli_stmt $stmt )

Es llamada para devolver un conjunto de resultados de una consulta de sentencia preparada.

Parámetros

stmt

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

Valores devueltos

Devuelve un conjunto de resultados para consultas SELECT select, o FALSE para otras consultas DML o en caso de fallo. La función mysqli_errno() se puede emplear para distinguir entre dos tipos de fallo.

MySQL Native Driver Only

Disponible sólo con mysqlnd.

Ejemplos

Ejemplo #1 Estilo orientado a objetos

<?php 

$mysqli 
= new mysqli("127.0.0.1""usuario""contraseña""world"); 

if(
$mysqli->connect_error)
{
    die(
"$mysqli->connect_errno$mysqli->connect_error");
}

$consulta "SELECT Name, Population, Continent FROM Country WHERE Continent=? ORDER BY Name LIMIT 1";

$sentencia $mysqli->stmt_init();
if(!
$sentencia->prepare($consulta))
{
    print 
"Falló la preparación de la sentencia\n";
}
else
{
    
$sentencia->bind_param("s"$continente);

    
$array_continentes = array('Europe','Africa','Asia','North America');

    foreach(
$array_continentes as $continente)
    {
        
$sentencia->execute();
        
$resultado $sentencia->get_result();
        while (
$fila $resultado->fetch_array(MYSQLI_NUM))
        {
            foreach (
$fila as $f)
            {
                print 
"$f ";
            }
            print 
"\n";
        }
    }
}

$sentencia->close();
$mysqli->close();
?>

Ejemplo #2 Estilo por procedimientos

<?php 

$enlace 
mysqli_connect("127.0.0.1""usuario""contraseña""world"); 

if (!
$enlace)
{
    
$error mysqli_connect_error();
    
$errno mysqli_connect_errno();
    print 
"$errno$error\n";
    exit();
}

$consulta "SELECT Name, Population, Continent FROM Country WHERE Continent=? ORDER BY Name LIMIT 1";

$sentencia mysqli_stmt_init($enlace);
if(!
mysqli_stmt_prepare($sentencia$consulta))
{
    print 
"Falló la preparación de la sentencia\n";
}
else
{
    
mysqli_stmt_bind_param($stmt"s"$continente);

    
$array_continentes = array('Europe','Africa','Asia','North America');

    foreach(
$array_continentes as $continente)
    {
        
mysqli_stmt_execute($sentencia);
        
$resultado mysqli_stmt_get_result($sentencia);
        while (
$fila mysqli_fetch_array($resultadoMYSQLI_NUM))
        {
            foreach (
$fila as $f)
            {
                print 
"$f ";
            }
            print 
"\n";
        }
    }
}
mysqli_stmt_close($sentencia);
mysqli_close($enlace);
?>

El resultado de los ejemplos sería:

Albania 3401200 Europe 
Algeria 31471000 Africa 
Afghanistan 22720000 Asia 
Anguilla 8000 North America 

Ver también

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User Contributed Notes 5 notes

up
37
Anonymous
4 years ago
I went through a lot of trouble on a server where mysqlnd wasn't available, and had a lot of headaches.

If you don't have mysqlnd installed/loaded whatever, you will get an undefined reference when trying to call "mysqli_stmt_get_result()".

I wrote my own mysqli_stmt_get_result() and a mysqli_result_fetch_array() to go with it.

<?php
class iimysqli_result
{
    public
$stmt, $nCols;
}   

function
iimysqli_stmt_get_result($stmt)
{
   
/**    EXPLANATION:
     * We are creating a fake "result" structure to enable us to have
     * source-level equivalent syntax to a query executed via
     * mysqli_query().
     *
     *    $stmt = mysqli_prepare($conn, "");
     *    mysqli_bind_param($stmt, "types", ...);
     *
     *    $param1 = 0;
     *    $param2 = 'foo';
     *    $param3 = 'bar';
     *    mysqli_execute($stmt);
     *    $result _mysqli_stmt_get_result($stmt);
     *        [ $arr = _mysqli_result_fetch_array($result);
     *            || $assoc = _mysqli_result_fetch_assoc($result); ]
     *    mysqli_stmt_close($stmt);
     *    mysqli_close($conn);
     *
     * At the source level, there is no difference between this and mysqlnd.
     **/
   
$metadata = mysqli_stmt_result_metadata($stmt);
   
$ret = new iimysqli_result;
    if (!
$ret) return NULL;

   
$ret->nCols = mysqli_num_fields($metadata);
   
$ret->stmt = $stmt;

   
mysqli_free_result($metadata);
    return
$ret;
}

function
iimysqli_result_fetch_array(&$result)
{
   
$ret = array();
   
$code = "return mysqli_stmt_bind_result(\$result->stmt ";

    for (
$i=0; $i<$result->nCols; $i++)
    {
       
$ret[$i] = NULL;
       
$code .= ", \$ret['" .$i ."']";
    };

   
$code .= ");";
    if (!eval(
$code)) { return NULL; };

   
// This should advance the "$stmt" cursor.
   
if (!mysqli_stmt_fetch($result->stmt)) { return NULL; };

   
// Return the array we built.
   
return $ret;
}
?>

Hope this helps someone.
up
28
jari dot wiklund at gmail dot com
6 years ago
Please note that this method requires the mysqlnd driver. Othervise you will get this error: Call to undefined method mysqli_stmt::get_result()
up
1
Anon
1 month ago
Please OH PLEASE.
I have been trying to get a result set from this function, and I had 0 luck completely, for nearly 3 hours!

If you ARE using mysqli_stmt_get_results() to get a result set, in conjuction with mysqli_stmt_store_results in order to retrieve the number of rows returned, you are going to have some major trouble!

PHP Documentation states that to retrieve the number of rows returned by a prepared select sql statement, one should call the following statements respectively:

mysqli_stmt_execute($stmt);
mysqli_stmt_store_result($stmt);
$num_rows = mysqli_stmt_num_rows($stmt);

THIS IS A MAJOR DEATH TRAP, IF YOU ARE USING mysqli_stmt_get_result() in conjunction!!!! Results of doing so vary depending which statements you call first, but in the end, you will NOT get the desired result.

In conclusion, please, PLEASE, NEVER use mysqli_stmt_store_result(), then mysqli_ AND mysqli_stmt_get_result() at the the same time. This is a MAJOR death trap.

SOLUTION:
If you are trying to get a result set, and you need the number of rows returned at the same time, use the following statements respectively instead:

$result_set = mysqli_stmt_get_results($stmt);
$num_rows = mysqli_num_rows($result_set);

Reflecting on my actions, this solution may seem fairly obvious. However, to someone new using PHP (like me) or someone who is not fully comfortable with prepared statements, it's very easy to get lost by using Google and learn on your own.

Summary:
NEVER use mysqli_stmt_store_result($stmt) & mysqli_stmt_num_rows($stmt) in conjunction with mysqli_stmt_get_result($stmt). You will regret it!! I have been stuck on this for hours, and Google offered me no answer!
up
0
jeffspicer at gmail dot com
1 month ago
To prevent others from hours of screaming trying to figure out why this does not work when you have the native driver enabled.  It is because you need to make sure you enable both native drives mysqlnd and nd_mysqli on your server if you wish to use this functionality.

Otherwise just enabling the mysqlnd native driver does include the mysqli_stmt_get_result function as this apparently resides in the nd_mysqli native driver.  Unfortunately, most documentation only ever talks about the mysqlnd native driver.

Once you enable both native drivers this function works as documented.
up
0
Haravikk
1 year ago
For those interested, this function seems to always produce a stored result, making it equivalent to mysqli::store_result(), rather than fetching on demand as in the case of mysqli::use_result().

This is important as it means that you cannot control the nature of the result as you would normally by calling mysqli_stmt::store_result() prior to fetching, as I had personally expected.

So, if you want to emulate the behaviour of mysqli::use_result() you will still need to use mysqli_stmt::bind_param() and mysqli_stmt::fetch().
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