Question

我一直在尝试设置一种方法来获取我的下面的代码段2并将其转换为while循环。现在，代码段2必须被复制和粘贴4次才能获得正确的效果。如何增加指向变量的SQL查询？

我的问题是试图使这部分能够在循环中工作。所以它第一次使用查询9，然后查询10，然后查询11，依此类推。所以// WHILE LOOP在这里会有一个循环，整个事情运行5次，但改变了暴徒更新的内容。

            // Update the Mob Position
        $statement9 = $db->prepare($query9);
        $result9 = $statement9 -> execute(array(
        'mob_list_id' =>$id,
        'mob_1_x' =>$mob_number_y[0],
        'mob_1_y' =>$mob_number_y[0] - 32
        ));

代码段1

$query9 = "UPDATE mob_1
       SET mob_1_x = :mob_1_x, mob_1_y =:mob_1_y
       WHERE mob_list_id = :mob_list_id";

$query10 = "UPDATE mob_1
       SET mob_2_x = :mob_2_x, mob_2_y =:mob_2_y
       WHERE mob_list_id = :mob_list_id";

$query11 = "UPDATE mob_1
       SET mob_3_x = :mob_3_x, mob_3_y =:mob_3_y
       WHERE mob_list_id = :mob_list_id";

$query12 = "UPDATE mob_1
       SET mob_4_x = :mob_4_x, mob_4_y =:mob_4_y
       WHERE mob_list_id = :mob_list_id";

$query13 = "UPDATE mob_1
       SET mob_5_x = :mob_5_x, mob_5_y =:mob_5_y
       WHERE mob_list_id = :mob_list_id";

代码段2

$roll = 0;

// WHILE LOOP HERE
{
$roll = mt_rand(1,6);
if ( $roll == 1 || $roll == 5 )
{
$direction = mt_rand(1,4);

if ( $direction == 1 )
{
    if ( $mob_number_y[0] > 126 )
    {
        // Update the Mob Position
        $statement9 = $db->prepare($query9);
        $result9 = $statement9 -> execute(array(
        'mob_list_id' =>$id,
        'mob_1_x' =>$mob_number_x[0],
        'mob_1_y' =>$mob_number_y[0] - 32
        ));

        $mob_number_y[0]-= 32;
    }
}

if ( $direction == 2 )
{
    if ( $mob_number_x[0] > 240 )
    {
    // Update the Mob Position
    $statement9 = $db->prepare($query9);
    $result9 = $statement9 -> execute(array(
    'mob_list_id' =>$id,
    'mob_1_x' =>$mob_number_x[0] - 32,
    'mob_1_y' =>$mob_number_y[0]
    ));

    $mob_number_x[0]-= 32;
    }
}

if ( $direction == 3 )
{
    if ( $mob_number_x[0] < 848 )
    {
        // Update the Mob Position
        $statement9 = $db->prepare($query9);
        $result9 = $statement9 -> execute(array(
        'mob_list_id' =>$id,
        'mob_1_x' =>$mob_number_x[0] + 32,
        'mob_1_y' =>$mob_number_y[0]
        ));

        $mob_number_x[0]+= 32;
    }
}

if ( $direction == 4 )
{
    if ( $mob_number_y[0] < 734 )
    {
        // Update the Mob Position
        $statement9 = $db->prepare($query9);
        $result9 = $statement9 -> execute(array(
        'mob_list_id' =>$id,
        'mob_1_x' =>$mob_number_x[0],
        'mob_1_y' =>$mob_number_y[0] + 32
        ));

        $mob_number_y[0]+= 32;
    }
}
}
}

Answer 1

使用

$direction = mt_rand(9,13);

然后将变量生成为动态或变量变量（http://docs.php.net/manual/en/language.variables.variable.php），如此

$statement{$direction} = $db->prepare($query{$direction});

等 - 或者您可以创建查询和其他变量数组

$query[9] = "UPDATE mob_1
   SET mob_1_x = :mob_1_x, mob_1_y =:mob_1_y
   WHERE mob_list_id = :mob_list_id";

然后使用

$direction = mt_rand(9,13);
$statement[$direction] = $db->prepare($query[$direction]);

用SQL查询做一个while循环

1 个答案: