使用While循环减少Foreach嵌套和替换?

时间:2012-12-21 15:49:54

标签: php mysql arrays pdo

我目前在while loop中运行了一个MySQL脚本,如下所示:

$Query = mysql_query("SELECT * FROM appointments");
    while ($Rows = mysql_fetch_array($Query))
    {
        ...
    }

这会将一行返回为数组,我可以根据需要对其进行操作,例如:

if ($Rows['Reoccour'] == 1)
        {
            $NextDate = date('o-m-d', strtotime($Rows['Date'] . " +" . $Rows['howfar'] . " weeks"));
            if ($NextDate < date('o-m-d'))
            {
                mysql_query("UPDATE appointments SET Date='$NextDate' WHERE ID='{$Rows['ID']}'");
            }
        }

这将放在while循环中,这样我就可以使用数组本身。但是我想迁移到PDO,我在获取我想要的array格式时遇到了麻烦:

这是我的代码:

$Query = $dbh->prepare("SELECT * FROM appointments");
    $Query->execute();
    $Results = $Query->fetchAll();
    print_r($Results);

这会生成一个多维数组,如下所示:

Array ( 
    [0] => Array ( 
    [ID] => 1 
    [0] => 1 
    [Appointment] => JCP Lucy
    [1] => JCP Lucy 
    [Date] => 2012-12-21
    [2] => 2012-12-21
    [Location] => Grays JCP
    [3] => Grays JCP 
    [Reoccour] => 1 
    [4] => 1 
    [howfar] => 1 
    [5] => 1
    )

    [1] => Array ( 
    [ID] => 3
    [0] => 3 
    [Appointment] => JCP Sign On
    [1] => JCP Sign On 
    [Date] => 2012-12-14 
    [2] => 2012-12-14 
    [Location] => 
    JCP Grays 
    [3] => JCP Grays 
    [Reoccour] => 1 
    [4] => 1 
    [howfar] => 2 
    [5] => 2 ) 

 ) 

我想要做的是在$Results = $Query->fetchAll();设置中使用我在使用MySQL函数时使用的while loop

如果我想将阵列缩小到单个字符串,我将不得不做类似的事情:

foreach ($Results AS $results)
{
    foreach ($results AS $result)
    {
        echo "{$result} <br>"; 
    }
}

但是这回归:

1
JCP Lucy
JCP Lucy
2012-12-21
2012-12-21
Grays JCP
Grays JCP
1
1
1
1
3
3
JCP Sign On
JCP Sign On
2012-12-14
2012-12-14
JCP Grays
JCP Grays
1
1
2
2 

其中包含重复值。我的问题是:

1)删除重复的值

2)使用我的PDO Api时执行while loop - 但是当我完成mysql_fetch_array功能时,可以像我一样使用数组键。

1 个答案:

答案 0 :(得分:0)

我相信您正在寻找传递给fetchAll()的选项PDO::FETCH_ASSOC

$Query->fetchall(PDO::FETCH_ASSOC);

PDO::FETCH_ASSOC为您提供

results = array(
  [0] => array(
    'column' => 'value',
    'column' => 'value',
    ...
  ),
  [1] => array(
     ...
  },
  ...
);

然后你可以迭代。