尝试使用刀片获取foreach循环中的键

Question

如果我使用,{{$node[0]->url}}那么Laravel的模板引擎会显示正确的结果,但是我无法弄清楚如何在@foreach循环中使用@for $ i = 0来显示所有内容这就是我在路径文件中的内容

$oReturn = new stdClass();
        $fid='endpoints';//sample fid

        $url = 'http://localhost:5493/sdata/$system/registry/'.$fid;

        $xml = simplexml_load_file($url);
        foreach($xml->xpath("//sdata:payload") as $entry) {
            // xpath here must be from payload to endPoint--type
            $content = $entry->xpath("./sdata:endPoint--type");

            foreach($content as $c) {
                // Make set of children with prefix sdata
                $nodes = $c->children('sdata', true);

            }

// add parsed data to the array
            $oReturn->entry[] = $nodes;

        }
        return View::make('index', compact('oReturn'));

这就是我在我的视图文件中尝试过的

@for($i=0; $i < 4; $i++)
@endfor
@foreach ($oReturn as $node)
   <li>{{$node[$i]->url}}</li>
@endforeach

对不起,这是完整的print_r结果

Array ( [oReturn] => stdClass Object 
( [entry] => Array 
    ( 
        [0] => SimpleXMLElement Object ( [description] => Sage 50 Accounts [protocol] => http [host] => base_3 [applicationName] => accounts50 [contractName] => SimpleXMLElement Object ( ) [dataSetName] => - [url] => http://base_3:5493/sdata/accounts50 [isBrowsable] => true [aliveStamp] => 2015-11-06T23:31:10.031+00:00 ) 
        [1] => SimpleXMLElement Object ( [endPointType] => dataSet [applicationName] => accounts50 [contractName] => GCRM [dataSetName] => Enter Your Company Name [url] => http://base_3:5493/sdata/accounts50/GCRM/{C22ACA13-3C4C-4E33-A584-CD99BD3002A6} ) 
        [2] => SimpleXMLElement Object ( [endPointType] => dataSet [applicationName] => accounts50 [contractName] => GCRM [dataSetName] => Enter Your Company Name [url] => http://base_3:5493/sdata/accounts50/GCRM/{FF476636-D4AF-4191-BDE4-891EDA349A68} ) 
        [3] => SimpleXMLElement Object ( [endPointType] => dataSet [applicationName] => accounts50 [contractName] => GCRM [dataSetName] => Enter Your Company Name [url] => http://base_3:5493/sdata/accounts50/GCRM/{C62A13D5-3FFE-43B4-9DAF-38F9055A83C7} ) 
        [4] => SimpleXMLElement Object ( [description] => GCRM Contract [endPointType] => contract [protocol] => http [host] => base_3 [applicationName] => accounts50 [contractName] => GCRM [dataSetName] => - [url] => http://base_3:5493/sdata/accounts50/GCRM [aliveStamp] => 2015-11-06T23:31:11.062+00:00 ) 
    ) 
) 
) 1

Answer 1

简单的答案是,foreachBlade中的工作方式与常规PHP相同foreach.你应该可以这样做:

@foreach ($nodes as $node)
    <li>{{ $node->url }}</li>
@endforeach

如果需要访问每个节点的数组键值:

@foreach ($nodes as $key => $node)
    <li>{{ $key }}: {{ $node->url }}</li>
@endforeach

但是,我认为问题可能不在于您的Blade语法,而在于您创建输入变量的方式.鉴于您$oReturn在上面的代码中创建的方式,它将没有您看起来期望的属性.为了说明,这里是您创建的简化版本:

// initialize your return variable 
$oReturn = new stdClass();

// create a dummy array <sdata:x> nodes,
// to simulate $nodes = $c->children('sdata', true);
$node = new SimpleXMLElement('<sdata:x/>');
$nodes = [ $node, $node, $node ];

// simulate adding nodes to the array of entries 
$oReturn->entry[] = [ $node, $node, $node ];

// print out the resulting structure
print_r( compact( 'oReturn' ) );

会回来:

Array(
    [oReturn] => stdClass Object
        (
            [entry] => Array
                (
                    [0] => Array
                        (
                            [0] => SimpleXMLElement Object()
                            [1] => SimpleXMLElement Object()
                            [2] => SimpleXMLElement Object()
                        )
                )
        )
)

所以当你做@foreach ($oReturn as $node)的时候,值$node就是entry[]数组,它有一个单独的元素,就是一个节点数组.从您的输入中不清楚这些节点甚至有url元素.如果您确实希望遍历节点,则必须执行以下操作:

@foreach ($oReturn->entry[0] as $node)
    <li>{{ $node->url }}</li>
@endforeach

这有意义吗？我想你需要重新思考你的创作$oReturn.

更新

鉴于以下反馈和上述print_r声明的输出,以下内容应该有效:

@foreach ($oReturn->entry as $node)
    <li>{{ (string) $node->url }}</li>
@endforeach

将(string)结果转换$node->url为字符串.否则PHP可能会将其视为某种对象.SimpleXMLElement可能很奇怪.