Question

我正在创建一个PHP / MSQL应用程序，它基本上是一个在线测验，用户将在内部为一个实例启动测验，从db-table中检索30个问题并存储在会话中。我的数据库表有 qid，question，op1，op2，op3，op4，ans，category 作为列（因为每个问题应该有4个选项和一个答案）。我想检索存储在特定类别表中的所有（对于实例30）问题，并使用一些将它们保存在会话变量中作为二维/三维关联数组循环说while（）/ for（）等。

我写的脚本是，

session_start();
require 'connection.php';
$sql = "SELECT * FROM questions WHERE category='$category'";
$result = mysql_query($sql) or die(mysql_error());
$found=mysql_num_rows($result) or die(mysql_error());
if ($found!=0) {
    $i="1";
    $sql= "SELECT * FROM questions WHERE category='$category'";
    $result = mysql_query($sql) or die(mysql_error());
    while ($que= mysql_fetch_assoc($result) && $i<=$found) {
        $_SESSION["$i"]= array(
                                "question"=>$que['question'],
                                "op1"=>$que['op1'],
                                "op2"=>$que['op2'],
                                "op3"=>$que['op3'],
                                "op4"=>$que['op4'],
                                "ans"=>$que['ans']
                                );
                  $i++;
                 }
        echo $_SESSION["$i"]; // echo-ing some session variable
}
mysql_close($dbc);

我还使用下面给出的脚本来提前做同样的事情，但没有成功 -

session_start();
    require 'connection.php';
    $sql = "SELECT * FROM questions WHERE category='$category'";
    $result = mysql_query($sql) or die(mysql_error());
    $found=mysql_num_rows($result) or die(mysql_error());
    if ($found!=0) {
        $i="1";
        $result1 = mysql_query($sql) or die(mysql_error());
        $_SESSION['que'][][]=array();
        while ($que= mysql_fetch_assoc($result1) && $i<=$found) {
                $_SESSION['que'][$i]['question']=$que['question'];
                $_SESSION['que'][$i]['op1']=$que['op1'];
                $_SESSION['que'][$i]['op2']=$que['op2'];
                $_SESSION['que'][$i]['op3']=$que['op3'];
                $_SESSION['que'][$i]['op4']=$que['op4'];
                $_SESSION['que'][$i]['ans']=$que['ans'];
            $i++;
            }
            }
    mysql_close($dbc);

最后我可以使用以下代码执行此操作 -

session_start();
        require 'connection.php';
        $sql = "SELECT * FROM questions WHERE category='$category'";
        $result = mysql_query($sql) or die(mysql_error());
        $found=mysql_num_rows($result) or die(mysql_error());
        if ($found!=0) {
            $i="1";
            $result1 = mysql_query($sql) or die(mysql_error());
            while ($que= mysql_fetch_assoc($result1) && $i<=$found) {
                    $str="que".$i;
                    $_SESSION[$str]['qno']=$i;
                    $_SESSION[$str]['question']=$que['question'];
                    $_SESSION[$str]['op1']=$que['op1'];
                    $_SESSION[$str]['op2']=$que['op2'];
                    $_SESSION[$str]['op3']=$que['op3'];
                    $_SESSION[$str]['op4']=$que['op4'];
                    $_SESSION[$str]['ans']=$que['ans'];
                    $_SESSION[$str]['opt']="0";
                $i++;
                }
                }
        mysql_close($dbc);

Answer 1

试试这个。

require 'connection.php';
session_start();
$sql = "SELECT * FROM questions WHERE category='$category'";
$result = mysql_query($sql) or die(mysql_error());
$found=mysql_num_rows($result) or die(mysql_error());
if ($found!=0) {
$i=1;
$sql= "SELECT * FROM questions WHERE category='$category'";
$result = mysql_query($sql) or die(mysql_error());
while ($que= mysql_fetch_assoc($result) && $i<=$found) {
    $_SESSION[$i]= array(
                            "question"=>$que['question'],
                            "op1"=>$que['op1'],
                            "op2"=>$que['op2'],
                            "op3"=>$que['op3'],
                            "op4"=>$que['op4'],
                            "ans"=>$que['ans']
                            );
    }
    print_r($_SESSION[$i]);
    $i++;
}
mysql_close($dbc);

从表中检索特定行并将每行存储为会话中的关联数组

1 个答案: