运行 php 脚本之前的确认框答案

【问题标题】：Confirmation box before running a php script运行 php 脚本之前的确认框
【发布时间】：2017-12-27 00:46:02
【问题描述】：

<?php 
//Connect to Database
$link = mysqli_connect('localhost', 'xxxxxxx', 'xxxxxxx', 'xxxxxxx');
mysqli_set_charset($link,'utf8');
$delistpost= htmlspecialchars($_GET["delistpost"]);
//$request = $_SERVER['QUERY_STRING']; 
$request = $delistpost;

//Error message on unsuccessful connection (connection failure)
if ($link==false){
    //Print error information
    echo(" ERROR: Could not connect.<br>".mysqli_connect_error());
}

//Successful connection message
else{
    //Split the query string taking '=' as the delimiter
    if (strpos($request, '=')) 
    {
        $n=split("=",$request);
//      $queryStringType=$n[0];
        $offset =$n[1];
    }

    $userchar = substr($offset,0,2);
    $key = ltrim(substr($offset, 2, -1), '0');
    $status = substr($offset,-1,1);

    $query = "SELECT postid FROM userwisePost WHERE postid = $key AND user_email like '$userchar%' AND status = '$status'" ;
    $updatequery = "UPDATE userwisePost SET post_status = 'draft' WHERE postid = $key AND user_email like '$userchar%' AND status = '$status'" ;

    //Print the confirmation of SQL query
    $verify = mysqli_query($link,$query);
        if(mysqli_num_rows($verify) > 0){ 

            $updateresult = mysqli_query($link,$updatequery);
            if($updateresult==true){

RUN FUNCTION TO SHOW SUCCESS UPDATION.
}

else RUN FUNCTION TO SHOW FAILURE.


?>

我在这里连接到一个数据库。我根据我的要求解密查询字符串。在我解密查询字符串后，我将它与数据库中的一条记录进行匹配，如果一切都匹配，我需要运行更新查询。

目前我的程序正在更新它而没有确认。我需要用户按下确认按钮来运行更新查询。

我知道我需要 javascript 来跟踪用户按钮的点击。如果用户确认，我需要在按钮单击时显示 HTML 页面，否则页面应重定向到主页。

【问题讨论】：

标签： php html api confirmation

【解决方案1】：

<?php 
//Connect to Database
include "dbconnect.php";


$delistpost= htmlspecialchars($_GET["delistpost"]);
//$request = $_SERVER['QUERY_STRING']; 
//$request = $delistpost;

    //Split the query string taking '=' as the delimiter

    $userchar = substr($delistpost,0,2);
    $key = ltrim(substr($delistpost, 2, -1), '0');
    $status = substr($delistpost,-1,1);

    $query = "SELECT postid FROM userwisePost WHERE postid = $key AND user_email like '$userchar%' AND status = '$status'" ;
           $verify = mysqli_query($dbconnect,$query);

        if($verify==true){
            if(mysqli_num_rows($verify) > 0)
            {
                echo    '<!DOCTYPE html>
                        <html>
                        <head>
                        <meta charset="UTF-8">
                        <title>Confirmation</title>                      
                            <link rel="stylesheet" href="alertstyle.css">                      
                        </head>
                        <body>
                        <div class="container"> 
                        <form id="contact" action="changepoststatus.php?delistpost='.$delistpost.'" method="post">
                        <center><h3>Confirmation</h3>
                        <h4>Are you sure you want to delist your post?<br>If you wish to activate the post again, please contact the system administrator or email us at xxxxxxxxxx.</h4>
                        </center>
                            <fieldset>
                            <center>
                            <button name="delistpost" type="submit" id="contact-submit" style="width: 49%;">Confirm</button>
                            </center>
                            </fieldset>
                        </form>
                        </div>
                        </body>
                        </html>';                    
            }
        else {
            echo        '<!DOCTYPE html>
                        <html>
                        <head>
                        <meta charset="UTF-8">
                        <title>Failure</title>                      
                            <link rel="stylesheet" href="alertstyle.css">                      
                        </head>
                        <body>
                        <div class="container"> 
                        <form id="contact" action="https://xxxxxxxxxx" method="post">
                        <center><h3>Failure</h3>
                        <h4>Something went wrong<br>Please contact the system administrator or email us at xxxxxxxxxx.</h4>
                        </center>
                            <fieldset>
                            <center>
                            <button name="delistpost" type="submit" id="contact-submit" style="width: 49%;">Homepage</button>
                            </center>
                            </fieldset>
                        </form>
                        </div>
                        </body>
                        </html>';                     

        }
    }

?>

我就是这样做的。我在按下按钮时调用另一个链接。 changepoststatus.php 的代码几乎相同，但使用的是更新查询而不是选择查询。

【讨论】：