Php 函数不'；即使它返回真值，也不能工作

我正在创建一个在线献血管理网站。在网站的员工用户端，有一个“标记为完成”功能，用于记录献血者何时成功参加并完成预定的献血预约

员工用户单击“标记为完成”后，应发生以下情况：

TBLAPPOINTS中约会的“完成”列更新为

1

捐赠用户收到通知，其预约已被员工用户标记为已完成

“bloodUnitsReceived”列的值增加1。（例如：如果患者到目前为止已收到2个血液单位，则新的献血将

bloodUnitsReceived

列更新为3）

“收单机构”，即代表患者请求献血的与患者相关的用户，收到有人向其献血的通知

以上一切都很成功。现在，在通知捐赠者和收单者后，我希望系统检查患者是否已收到他们所需的所有血液单位（即

if（amtBloodUnitsRequired==bloodUnitsReceived）

）。如果是这样，则收单机构会收到通知，告知其患者/爱人已完成其规定的血液单位，并存档其献血请求

这是我做的函数：

function checkAndMarkPatientDone($conn,$patientID){
        //check if patient has completed donations needed
        $checkReceived = $conn->query("Select acquirerID,patientFN, patientMI, patientLN, amtBloodUnits, bloodUnitsReceived from tblpatient where id = '$patientID'");

        if($checkReceived -> num_rows>0){    

          $bloodUnits= $checkReceived->fetch_all(MYSQLI_ASSOC); 
          foreach($bloodUnits as $blood){
            
            $amtBloodUnits = $blood['amtBloodUnits'];
            $bloodReceived = $blood['bloodUnitsReceived'];
            $patientFullName = $blood['patientFN']." ".$blood['patientMI'].". ".$blood['patientLN'];
            $acquirerID = $blood['acquirerID'];
            
          }

          //if blood units received have matched blood units needed
          if($bloodReceived == $amtBloodUnits){
            //update patient as complete
            $update = "UPDATE tblpatient set completed = 1 where id = '$patientID'";

            //archive blooddonation request
            $archiveRequest = "UPDATE blooddonationrequest as r INNER JOIN tblpatient as p on r.patientID = p.id set archived = 1 where p.id = '$patientID'";

            if(($conn->query($update)==TRUE) && ($conn->query($archiveRequest)==TRUE)) {
                return true;
            }
            else{
                return false;
            }
          }
          else{
            return false;
          }
        }
    }

在这里，我调用函数，并在函数返回true时发送通知和电子邮件通知：

if(checkAndMarkPatientDone($conn,$patientID)==true){
          //notify acquirer
                 $icon = "/WBBSD/header/done.png";
                $notifTitle = "Your goal of reaching".$unitsNeeded." blood units for ".$patientName." has been reached!";
                $notifMsg = "It\'s our pleasure in helping you find the blood your loved one needs. We pray for your loved one\'s healing!";
                $usertype = "acquirer";
                $acquirerID = $acquirerID;

                if(addNotif($conn,$icon, $notifTitle, $notifMsg,$usertype,$acquirerID)==false){
                   $_SESSION['errorMsg'] = "Error notifying about blood completion.";
                }

                //send email to acquirer
          $acquirerDetails = getAcquirerDetails($conn,$acquirerID);
          $userEmail = $acquirerDetails['email'];
          $userFullName = $acquirerDetails['firstName']." ".$acquirerDetails['middleInitial'].". ".$acquirerDetails['lastName'];

          $emailResult = sendEmail($userEmail,$notifMsg,$userFullName,$notifTitle);

        $_SESSION['informMsg'].="\n Acquirer Email Status: ".$emailResult;
}

我遇到的问题是，

if（checkandmarkpatientsdone（$conn，$patientID）==true）下的代码根本不运行。在它完成之前的所有代码和函数都可以运行（下面完成代码），但系统似乎忽略了这部分代码。起初我认为可能是
checkandmarkpatientsdone（）
函数没有返回true，因此我测试了该函数并在单独的PHP文件中调用它。在测试过程中，该函数确实成功运行并返回true，但当我将其与其他代码一起包含时，它就不起作用了

以下是员工点击献血预约“标记完成”按钮的完整代码，供您参考：

   if (isset($_POST['btnDone'])) {

      $requestID = $_POST['requestID'];
      //need to know donor id to know who to add
      $donorID = $_POST['donorID'];
      //update that tblappointment is done
      $updatequery = "UPDATE tblappointment SET completed = 1 where donationRequestID = '$requestID'";
      if($conn->query($updatequery)==TRUE){
        $_SESSION['successMsg'] = "Appointment successfully marked complete";

      //record donation to patient and donor side
        if(addDonation($conn,$donorID,$requestID) == TRUE){
          $_SESSION['successMsg'].=" and donation recorded successfully";

          //notify donor for completed appointment
          $icon = "/WBBSD/header/blood-donation.png";
          $notifTitle = "Your appointment was marked complete.";
          $notifMsg = "Thank you for attending and completing your blood donation. Make sure to get enough rest and nutrients. Come back after 3 months!";
          $usertype = "donor";
          $donorID = $donorID;

          if(addNotif($conn,$icon, $notifTitle, $notifMsg,$usertype,$donorID)==false){
                  $_SESSION['errorMsg'] = "Error with notifying donor.";
                }//if addnotif flase

           //send email to donor
          $donorDetails = getDonorDetails($conn,$donorID);
          $userEmail = $donorDetails['email'];
          $userFullName = $donorDetails['firstName']." ".$donorDetails['middleInitial'].". ".$donorDetails['lastName'];
            
          $_SESSION['informMsg'] ="Donor Email Status: ".sendEmail($userEmail,$notifMsg,$userFullName,$notifTitle);


          //get patient details for acquirer notification
          $patientresult = $conn->query("SELECT * FROM tblpatient as p INNER JOIN tblappointment as a on p.id = a.patientID where a.donationRequestID = '$requestID'");
          if($patientresult -> num_rows>0){

            $pDetails= $patientresult->fetch_all(MYSQLI_ASSOC); 
            foreach($pDetails as $pDetail){
              $patientName = $pDetail['patientFN']." ".$pDetail['patientMI'].". ".$pDetail['patientLN'];
              $apptDate = $pDetail['apptDate'];
              $bloodReceived = $pDetail['bloodUnitsReceived'];
              $bloodReceived = $pDetail['bloodUnitsReceived'];
              $unitsNeeded = $pDetail['amtBloodUnits'];
              $acquirerID = $pDetail['acquirerID'];
              //for checking if donations are complete
              $patientID = $pDetail['id'];
            }//foreach pdetails         
        }//if patientresult

        //notify acquirer for new donation
        $icon = "/WBBSD/header/help.png";
        $notifTitle = "Your loved one has received a blood donation!.";
        $notifMsg = "One of our registered blood donors has successfully donated blood for your loved one, ".$patientName." on ".$apptDate.". Your request has received ".$bloodReceived."/".$unitsNeeded." blood units so far.";
        $usertype = "acquirer";
        $acquirerID = $acquirerID;

        if(addNotif($conn,$icon, $notifTitle, $notifMsg,$usertype,$acquirerID)==false){
                $_SESSION['errorMsg'] = "Error with notifying donor.";
              }//if addnotif flase

        //send email to acquirer
          $acquirerDetails = getAcquirerDetails($conn,$acquirerID);
          $userEmail = $acquirerDetails['email'];
          $userFullName = $acquirerDetails['firstName']." ".$acquirerDetails['middleInitial'].". ".$acquirerDetails['lastName'];

        $_SESSION['informMsg'].="\n Acquirer Email Status: ".sendEmail($userEmail,$notifMsg,$userFullName,$notifTitle);

  

//check if reached blood goal
              if(checkAndMarkPatientDone($conn,$patientID)==true){
          //notify acquirer
                 $icon = "/WBBSD/header/done.png";
                $notifTitle = "Your goal of reaching".$unitsNeeded." blood units for ".$patientName." has been reached!";
                $notifMsg = "It\'s our pleasure in helping you find the blood your loved one needs. We pray for your loved one\'s healing!";
                $usertype = "acquirer";
                $acquirerID = $acquirerID;

                if(addNotif($conn,$icon, $notifTitle, $notifMsg,$usertype,$acquirerID)==false){
                   $_SESSION['errorMsg'] = "Error notifying about blood completion.";
                }

                //send email to acquirer
          $acquirerDetails = getAcquirerDetails($conn,$acquirerID);
          $userEmail = $acquirerDetails['email'];
          $userFullName = $acquirerDetails['firstName']." ".$acquirerDetails['middleInitial'].". ".$acquirerDetails['lastName'];

          $emailResult = sendEmail($userEmail,$notifMsg,$userFullName,$notifTitle);

        $_SESSION['informMsg'].="\n Acquirer Email Status: ".$emailResult;
         }//if check

//everything successful
        header("location: ../staff/staff_dash.php");
      }
      
      else{
        $_SESSION['errorMsg']="Failed to record donation";
      }       
    
    }
    else{
     $_SESSION['errorMsg'] = "Unable to mark appointment complete. Please try again.";
    }
   }

有什么问题吗？
忽略所有SQL注入问题，我们不知道什么是
$conn
，这可以说是最重要的细节，它是PDO实例吗？哦，对不起，$conn拥有到我收集的数据库的连接，但这仍然没有帮助。它是什么，
mysqli
对象，
PDO
，ORM处理程序？您需要更精确地提供哪些信息，并减少信息量，因为很多信息似乎都是不必要的。这是一个mysqli objectRight，首先，
mysqli
的查询方法永远不会返回true，它要么是
false
或者
mysqli\u结果
，因此检查
true
是一个很好的选择有点奇怪，虽然这不是问题，因为你做的比较很弱。问题是你是否“进入”了这个if块：
if（$bloodReceived==$amtBloodUnits）{