多個隊列只有最後一個正在執行

Question

我在下面有下面的代碼;

$sql = "SELECT * FROM tbl1 where id_no = '$id_no'"; 
    $result = $conn->query($sql); 

    if ($result->num_rows > 0) { 

    while($row = $result->fetch_assoc()) { 
     $new = $row['full_name']; 
     header("location:new.php?msg=ID Number $id is already 
     Registered"); 
    } 
    } else { 
     $created = date('jS \ F Y h:i:s A'); 
     $tr_no = 'TR_'.rand(10000,99999).'/'.date(Y).''; 

    include '../db_config/connection.php'; 

    //update tables 
    $sql = "INSERT INTO tbl2 (id,vehicle_id,policy_id,insured_by,insurance_co,value_insured,start_date,end_date,created)VALUES ('$tr_no','$reg_no','$p_id','$user_index','$co_id','$value_insured','$start_date','$end_date','$created')" ; 
    $sql = "UPDATE tbl1 SET updated='1' WHERE item_id = '$reg_no'"; 
    $sql = "INSERT INTO tbl3 (doc_number,value,date,reg_no) VALUES('$tr_no','-$value_insured','$created','$reg_no'"; 

    if ($conn->query($sql) === TRUE) { 
     header("location:new_insurance.php?message=ENTRIES SUCCESSFULLY POSTED"); 
    } else { 
     $error = $conn->error; 
     header("location:new_client.php?err=$error"); 
    } 

    $conn->close(); 



    } 
    $conn->close(); 

    ?> 

包含插入和更新查詢的最後一位是我們遇到問題的地方。而不是執行所有這三個查詢，只執行最後一個查詢。我應該包括哪些修改？

Answer 1

首先更改這些語句（串接在$ SQL變量，並添加分號 ';'。在每個語句的結束）

$sql = "INSERT INTO tbl2 (id,vehicle_id,policy_id,insured_by,insurance_co,value_insured,start_date,end_date,created) VALUES ('$tr_no','$reg_no','$p_id','$user_index','$co_id','$value_insured','$start_date','$end_date','$created');" ; 
    $sql .= "UPDATE tbl1 SET updated='1' WHERE item_id = '$reg_no';"; 
    $sql .= "INSERT INTO tbl3 (doc_number,value,date,reg_no) VALUES('$tr_no','-$value_insured','$created','$reg_no');"; 

現在終於由mysqli_multi_query（）執行多個查詢

if (mysqli_multi_query($con,$sql)) { //con is your connection 
     header("location:new_insurance.......