我在php中编写了以下代码，并使用mongo db作为数据库
(?i)(?:b|[li]3)[0o]{2}取得＆＃34; studentList＆＃34;来自broadcastTbl表，$projection = array("broadcast_id" => 1,"studentList" => 1);
$query = array('broadcast_id'=> $broadcast_id);
$count = $this->collection->find($query)->count();
$cursor = $this->collection->find($query,$projection);
$result = array();
foreach($cursor as $row)
{
$idstring = trim($row["studentList"]);
$idstring = preg_replace('/\.$/', '', $idstring);
$idarray = explode('|', $idstring);
foreach($idarray as $studentId)
{
$this->StudentCollection = $this->db->studentTbl;
$StudentCursor= $this->StudentCollection->find(array("student_id" => $studentId));
if($StudentCursor->count() > 0)
{
foreach ($StudentCursor as $k => $srow) {
array_push($result, $srow);
}
}
else
{
array_push($result, array("datanotfound"=>1));
}
}
}
return json_encode($result);
有＆＃34; 5042 | 5043 | 5044＆＃34;作为studentTbl的学生ID的值。现在我试图通过在＆＃34; |＆＃34;的基础上逐个拆分来获取相应的学生详细信息。之后我试图将它们推入数组$ result。
始终显示$idstring为＆＃34; 1＆＃34;并且永远不要输入else块，即使find（）查询无法找到记录，然后它显示输出为[]，即它始终保持在if语句!!!
请帮我跟踪代码中的错误并有效地编写代码!!!