遍历数组不起作用

Question

json 对象作为输出出现在变量 $results 中，如

           Array ( [ts] => MongoTimestamp Object ( [sec] => 1497334764 [inc] => 1 ) [t] => MongoInt64 Object ( [value] => 1 ) [h] => MongoInt64 Object ( [value] => -3885623284897060533 ) [v] => 2 [op] => i [ns] => mgl.triggersTbl [o] => Array ( [_id] => MongoId Object ( [$id] => 593f83ec1d7859cc0f000029 ) [Name] => Ahmad [Address] => Delhi ) ) 
           Array ( [ts] => MongoTimestamp Object ( [sec] => 1497349628 [inc] => 1 ) [t] => MongoInt64 Object ( [value] => 8 ) [h] => MongoInt64 Object ( [value] => -3083419979530819825 ) [v] => 2 [op] => i [ns] => mgl.triggersTbl [o] => Array ( [_id] => MongoId Object ( [$id] => 593fbdfc1d78591819000029 ) [Name] => Nehal [Address] => Mumbai ) ) 
           Array ( [ts] => MongoTimestamp Object ( [sec] => 1497428148 [inc] => 1 ) [t] => MongoInt64 Object ( [value] => 9 ) [h] => MongoInt64 Object ( [value] => -660915868390613413 ) [v] => 2 [op] => i [ns] => mgl.triggersTbl [o] => Array ( [_id] => MongoId Object ( [$id] => 5940f0b41d78591414000029 ) [Name] => Seema [Address] => Mumbai ) )

密码是

             $cursor = $c->find(array('ns'=> 'mgl.triggersTbl', 'op' => 'i'));
    // $cursor->timeout(-1);
     $cursor->tailable(true);
     //$cursor->awaitData(true);

     while ($cursor->hasNext()) {
     $cursor->timeout(-1);
     try
     {
         $results =array();
         $results = $cursor->getNext();
         var_dump($results);
     }

现在我试图一个一个地获取这些值，以使其可以呈现。

        foreach ($results as $key)
        {   
          foreach ($key as $p => $res)
           {
            echo "Timestamp"." : ". $key["sec"]."<br/>";
            echo "Name"." :".$res["Name"]."<br/>";
            echo "Address"." :".$res["Address"];
          }
        }

此代码无效。它会抛出错误消息。

" 不能将 MongoTimestamp 类型的对象用作 " echo "Timestamp"" 中的数组。: "。 $key["sec"]."
";"

如果我用

        foreach ($results as $res)
        {   
            echo "Name"." :".$res["Name"]."<br/>";
            echo "Address"." :".$res["Address"];
        }

仍然抛出错误信息

请帮忙!!!

Answer 1

如果您使用 foreach 作为这种形式的数组，您将遍历值，而不是键。第一个值是您的对象 (MongoTimestamp)，您在第一个 echo 中将其作为数组访问。请参阅评论以获取更多建议。

更新： 数组有点难读，也许做一个 print_r(array_keys($result)) 来确保结构是你期望的（而不是那个一些东西嵌套在你的数组中的数组更深的层次）。

Answer 2

数组中的每个元素都是不同的，因此循环遍历数组中的每个元素是没有意义的。

假设下面是 $results,

array(7) { 
    ["ts"]=> object(MongoTimestamp)#6 (2) { 
        ["sec"]=> int(1497334764) 
        ["inc"]=> int(1)
    } 
    ["t"]=> object(MongoInt64)#7 (1) { 
        ["value"]=> string(1) "1"
    } 
    ["h"]=> object(MongoInt64)#8 (1) { 
        ["value"]=> string(20) "-3885623284897060533"
    }
    ["v"]=> int(2) 
    ["op"]=> string(1) "i"
    ["ns"]=> string(15) "mgl.triggersTbl"
    ["o"]=> array(3) {
        ["_id"]=> object(MongoId)#9 (1) {
            ["$id"]=> string(24) "593f83ec1d7859cc0f000029"
        }
        ["Name"]=> string(5) "Ahmad"
        ["Address"]=> string(5) "Delhi"
    }
}

您可以使用下面的代码从上到下打印所有值。

echo $results["ts"]->sec;
echo $results["ts"]->inc;
echo $results["t"]->value;
echo $results["h"]->value;
echo $results["v"];
echo $results["op"];
echo $results["o"]["_id"]->{'$id'};
echo $results["o"]["Name"];
echo $results["o"]["Address"];

遍历数组不起作用

Traversing through array not working

php

php-5.6

php-5.5