每當我刷新jquery移動頁面時行被插入數據庫

Question

我正在製作一個jQuery移動web應用程序，我正在使用多頁面佈局。我在頁面加載時連接到mySQL，並在第二個div頁面上，我有一個表單，使用php文件在提交時將表單中的值發送到mySQL數據庫。

我的問題是，每次刷新Web應用程序時，都會將一行插入到數據庫的表中。我明顯不希望這種情況發生，直到我點擊/點擊提交按鈕。我對Web應用程序開發比較陌生，希望得到任何幫助，看看我做錯了什麼。

關於如何在多頁面佈局上通過php最好地插入mySQL數據庫的建議會很好。請讓我知道是否需要展示更多代碼。

<!--Top of second page within multi page layout containing form--> 
<!-- The POST A JOURNEY page where user creates a journey to be seen by others--> 
    <div data-role="page" id="postAJourney" data-add-back-btn="true" data-back-btn-text="back" data-rel="back" data-direction="reverse" data-transition="flip" data-theme="b" > 
     <div data-role="header" data-position="fixed"> 
      <h1>Post A Journey</h1> 
     </div> 

     <div data-role="content"> 
      <form action="add_journey.php" method="post" id="postAJourneyForm"> 

<!--Top of multipage layout--> 
<?php 
require 'database.php'; 
?> 

再次更新

<?php 

//get the journey data 
$radUserType = intval($_POST['radUserType']); 
$pjFrom = $_POST['pjFrom']; 
$pjTo = $_POST['pjTo']; 
$radioJourneyType = intval($_POST['radioJourneyType']); 
$departDate = $_POST['departDate']; 
$returnDate = $_POST['returnDate']; 
$textareanotes = $_POST['textAreaNotes']; 

//check all values from $_POST 
$canSubmitForm = false; 
$isFormEmpty = false; 

if (empty($radUserType) || empty($pjFrom) || empty($pjTo) || empty($radioJourneyType) || empty($departDate) || empty($returnDate) || empty($textareanotes)) 
{ 
$isFormEmpty = true; 
} 

//check for your data here 
if(isset($radUserType) && isset($pjFrom) && isset($pjTo) && isset($radioJourneyType) &&  isset($departDate) && isset($returnDate) && isset($textareanotes)) 
{ 
$canSubmitForm = true; 
} 

$departTime = '11:12'; 
$returnTime = '11:16'; 
$seatcounter = '2'; 

//will only get executed if true 
if ($canSubmitForm) 
{ 
if ($isFormEmpty == false) 
{ 
require_once('database.php'); 
$query = "INSERT INTO journey 
    (from_destination,to_destination,journey_type,depart_date,depart_time,return_date,return_time,seats_available,journey_message,user_type) 
     VALUES('$pjFrom','$pjTo','$radioJourneyType','$departDate','$departTime','$returnDate','$returnTime','$seatcounter','$textareanotes','$radUserType')"; 
$db->exec($query); 
// Perform Query 
//$result = mysql_query($query); 
//if($result === true) 
//{ 
// $result = 'success'; 
//} 
//else 
//{ 
// $result = 'insertion failure' . mysql_error(); 
//} 
include('index.php'); 
} 
} 
else 
{ 
$error = "Invalid product data. Check all fields and try again."; 
include('error.php'); 
} 
//Display the Product List page 
?> 

Answer 1

你需要打出來的插入邏輯和檢查的形式是有效的，並準備提交。

僞代碼：

// check all values from $_POST 
$canSubmitForm = false; 

// check for your data here 
// might want to verify type as well 
if (isset($radUserType) && isset($pjFrom) && isset($pjTo) && isset($radioJourneyType)) 
{ 
    $canSubmitForm = true; 
} 

// will only get executed if true 
if ($canSubmitForm) 
{ 
    require_once('database.php'); 
    $query = "INSERT INTO journey 
       (from_destination,to_destination,journey_type,depart_date,depart_time,return_date,return_ti  me,seats_available,journey_message,user_type) 
       VALUES('$pjFrom','$pjTo','$radioJourneyType','$departDate','$departTime','$returnDate','$re turnTime','$seatcounter','$textareanotes','$radUserType')"; 

    $db->exec($query); 
    // Perform Query 
    $result = mysql_query($query); 

    // the rest of your code here 
    ... 
}