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无法找到这个问题的答案。我有一个 mysqli 循环语句。在那个循环中,我想运行另一个查询。我不能把这两个sql写在一起。那可能吗?我想,因为我使用 stmt 并将其设置为准备语句。所以我添加了另一个变量stmt2。单独运行它们,但像我写的那样运行它会给我“mysqli致命错误:调用非对象上的成员函数bind_param()”

伪代码:

loop_sql_Statement {
    loop_another_sql_statement(variable_from_firsT_select) {
       echo "$first_statement_variables    $second_statemenet_variables";
    }
}
                $sql = "select dyr_id, dyr_navn, type_navn, dyr_rase_id, dyr_fodt_aar, dyr_kommentar, dyr_opprettet, dyr_endret
                    from dyr_opphald, dyr, dyr_typer
                    where dyropphald_dyr_id = dyr_id
                    and dyr_type_id = type_id
                    and dyropphald_opphald_id = ?";

            $stmt = $mysqli->prepare($sql);
            $stmt->bind_param("i",
             $p_opphald_id);
            $stmt->execute(); 

            $stmt->bind_result($dyr_id, $dyr_navn, $type_navn, $dyr_rase_id, $dyr_fodt_aar, $dyr_kommentar, $dyr_opprettet, $dyr_endret);

            echo "<table>";
            while($stmt->fetch()) {
                echo "<tr><td>$dyr_navn</td><td>$type_navn</td><td>$dyr_rase_id</td><td>$dyr_fodt_aar</td><td>";

                $sql2 = "select ekstra_ledetekst, ekstradyr_ekstra_verdi from dyr_ekstrainfo, ekstrainfo where ekstradyr_ekstra_id = ekstra_id and ekstradyr_dyr_id = ?";
                try {

                    $stmt2 = $mysqli->prepare($sql2);
                    $stmt2->bind_param("i",
                     $dyr_id);
                    $stmt2->execute(); 

                    $stmt2->bind_result($ekstra_ledetekst, $ekstra_ledetekst);
                    echo "<td>";
                    while($stmt2->fetch()) {
                        echo "$ekstra_ledetekst => $ekstra_ledetekst<br>";
                    }
                }catch (Exception $e) {}
                echo "</td></tr>";
            }
            echo "</table>";

答案:

愚蠢的我,我不知道我必须有两个 mysqli 连接。所以解决方案是声明另一个mysqli连接。

$mysqli = new mysqli($start, $name, $pwd, $selected_db);
$mysqli2 = new mysqli($start, $name, $pwd, $selected_db);
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1 回答 1

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您应该能够做到这一点,尽管您必须启动第二个连接。

于 2014-01-15T23:46:20.803 回答