mysqli最快的方式只发布一个结果

Question

I wonder if it's possible to do the following script without so much params and strings... I think there is much that can be removed... Maybe with only one query?

Thank you!

<?php
include("sqlvar.php");

$connection = new mysqli($host, $user, $pw, $db);
$marginidb = $connection->query("SELECT valore FROM DATIVENDITA WHERE parametro = 'margine'");
while($margine = $marginidb->fetch_object()) {
        $valoremargine = $margine->valore;
}
$connection->close();

echo $valoremargine;

$connection = new mysqli($host, $user, $pw, $db);
$ivadb = $connection->query("SELECT valore FROM DATIVENDITA WHERE parametro = 'iva'");
while($iva = $ivadb->fetch_object()) {
        $valoreiva = $iva->valore;
}
$connection->close();

echo $valoreiva;
?>

Answer 1

<?php
include("sqlvar.php");

$connection = new mysqli($host, $user, $pw, $db);

$marginidb = $connection->query("SELECT valore FROM DATIVENDITA WHERE parametro = 'margine' limit 1");
$margine = $marginidb->fetch_object();
echo $margine->valore;

$ivadb = $connection->query("SELECT valore FROM DATIVENDITA WHERE parametro = 'iva' limit 1");
$iva = $ivadb->fetch_object();
echo $iva->valore;

$connection->close();

?>

Answer 2

Here is what I think you're asking for:

<?php
include("sqlvar.php");
$result = array();
$connection = new mysqli($host, $user, $pw, $db);
$marginidb = $connection->query("SELECT valore FROM DATIVENDITA WHERE parametro = 'margine' OR parametro = 'iva'");
while($margine = $marginidb->fetch_object()) {
        array_push($result, $margine->valore);
}
$connection->close();
print_r($result);
?>

What this does is stores the results as an array so to access the first result you would use $result[0] and the second would be $result[1] . You could loop thro these results using a foreach loop.