foreach 循环在第一次迭代后停止

Question

尝试从 xml 文件中提取 id，将其传递给 api 查询，然后将结果加载到 dom 文档中。事情是我的foreach 循环只返回第一次迭代，然后似乎停止了。

为什么不回去获取下一个PROGRAM_ID？

//load results of first api call into simplexml - print_r here gives me a big array with all the expected rows in it
$progsitecontent = simplexml_load_file($progsiteapi);

//set which nodes to step through to reach required information
$totalprogsitecontent = $progsitecontent->matrix->rows->row;

//for each instance of a program id in this simplexml file:
foreach($totalprogsitecontent->PROGRAM_ID as $progid)
{

    //...substitute the program id into the api call
    $programdetails = $progdetailsapi_start.$progid.$progdetailsapi_end;
    $complete_program_details = simplexml_load_file($programdetails);

    //now for each instance of a programs info, load into a DOM document and carry out the below actions - from here down already works in another script so im sure the problem has to be above this point 

    $prog_info = $complete_program_details->matrix->rows->row;

    //create the top line container tag
    $row = $doc->createElement ("programInformation");

    //create the container tag
    $progID = $doc->createElement("programId");
    //fill it with the information you want
    $progID->appendChild ( $doc->createTextNode ( $prog_info->PROGRAM_ID ) );
    //attach this information to the row
    $row->appendChild($progID);

    //repeat for each element you want to include
    $progName = $doc->createElement("programName");
    $progName->appendChild ( $doc->createTextNode ( $prog_info->PROGRAM_NAME ) );
    $row->appendChild($progName);

    $progURLs = $doc->createElement("programUrls");
    $progURLs->appendChild ( $doc->createTextNode ( $prog_info->PROGRAM_URLS ) );
    $row->appendChild($progURLs);

    $progLogo = $doc->createElement("programLogo");
    $progLogo->appendChild ( $doc->createTextNode ( $prog_info->MERCHANT_LOGO ) );
    $row->appendChild($progLogo);

    $r->appendChild ($row);

}

echo $doc->saveXML();

请随意评论其中的任何内容是如何编写的。我还处于“一见倾心”的阶段:)

Answer 1

没有看到$totalprogsitecontent的完整结果就不能说太多，但我认为它应该是这样的：

foreach($totalprogsitecontent as $progid)
{
...
}

由于 $totalprogsitecontent->PROGRAM_ID 已经是一个值 - 所以您正在迭代这个元素而不是数组。

另外，您的 $progid 在 for 循环中是小写的，但您引用的是 $progID -- PHP 区分大小写。

---

查看您的 XML 代码后，它应该是这样的。

foreach($progsitecontent->matrix->rows->row as $row){
     $progid = $row['PROGRAM_ID'];
     $affid = $row['AFFILIATE_ID'];
}