Question

这里我显示了2个数据库表，即1是在输入用户详细信息后显示另一个是从chapter_subscription表中向输入的用户显示10章分配。在chapter_subscription表中有

章节编号字段
开始日期
结束日期

我的目标是创建一个结束日期的下拉选项，以便允许用户从下拉列表中选择它。但我的问题是我使用了选项标签，当我运行时它告诉意外的循环。请发送你帮忙解决这个错误，并让我显示每个显示结束日期的下拉列表。我是php的新手。请提前告诉你。 insert_dummy.php

<?php

    include('db.php');




    $userName=mysql_real_escape_string($_POST['userName']);



    $userEmail=mysql_real_escape_string($_POST['userEmail']);
    $userPassword=mysql_real_escape_string($_POST['userPassword']);
    $expiry_date1=mysql_real_escape_string($_POST['expiry_date']);
    $expiry_date=date("Y-m-d" ,strtotime($expiry_date1));
    $end_date1=mysql_real_escape_string($_POST['end_date']);
    $end_date=date("Y-m-d",strtotime($end_date1));



     $regDate = date("Y-m-d");



    function generateCode($characters) 
    {
        $possible = '23456789abcdefghjkmnpqrstuvwxyz!@#$%^&*';
        $code = '';
        $i = 0;
        while ($i < $characters) { 
            $code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
            $i++;
        }
        return $code;
    }

    $registration_key=generateCode(10);



    $str="insert into coeds_user(userName,userEmail,userPassword,regDate,expiry_date,registration_key) values('$userName','$userEmail','$userPassword','$regDate','$expiry_date','$registration_key')";


    $query=mysql_query($str);
    $userid=mysql_insert_id();
    if($query)
    {
    $display="Success";
    }
    else
    {
    $display= "Failed";
    }
    $string="select * from coeds_user where userId=$userid";
    $query2=mysql_query($string);
    $display.="<table border='1' align='center'>";
    $display.="<tr><th>UserName</th><th>UserEmail</th><th>UserPassword</th><th>RegDate</th><th>ExpiryDate</th><th>RegistrationKey</th><th colspan='3'>Action</th></tr>";
    while($result=mysql_fetch_array($query2))
    {
    $display.="<tr>";

    $display.="<td>".$result['userName']."</td>";
    $display.="<td>".$result['userEmail']."</td>";
    $display.="<td>".$result['userPassword']."</td>";
    $display.="<td>".$result['regDate']."</td>";
    $display.="<td>".$result['expiry_date']."</td>";
    $display.="<td>".$result['registration_key']."</td>";
    $display.="<td><a id='colour' class='tooltip' title='Edit' href='user_update.php?user_Id=".$result['userId']."'><img id='image' src='./images/small.gif'/></a></td>";
    $display.="<td><a id='colour' class='tooltip' data-toggle='tooltip' title='Delete' href='user_delete.php?user_Id=".$result['userId']." '><img id='image' src='./images/trash.png'/></a></td>";



    $display.="</table>";
     $end_date1 = date('Y-m-d', strtotime("+1 months"));
     $end_date2 = date('Y-m-d', strtotime("+3 months"));
     $end_date3 = date('Y-m-d', strtotime("+6 months"));
     $end_date4 = date('Y-m-d', strtotime("+9 months"));
     $end_date5 = date('Y-m-d', strtotime("+12 months"));
     $page="";


    $str="select chapter_no from chapter_details ";


    $query7=mysql_query($str);

    $count=mysql_num_rows($query7);
    for($i=0;$i<$count;$i++)
    {
    $chap_lic=generateCode(50);
    $chapter_no=mysql_result($query7,$i,'chapter_no');
    $start_date=date('Y-m-d');
    $expiry_date=mysql_real_escape_string($_POST['end_date']);
    $end_date=date("Y-m-d" ,strtotime("+3 months"));
    /*$end_date1=mysql_real_escape_string($_POST['end_date']);
    $end_date=date("Y-m-d",strtotime($end_date1));*/
    $s="insert into chapter_subscriptions (userId,chapter_no,start_date,end_date) values($userid,$chapter_no,'$start_date','$end_date')";
    $end_date=date("Y-m-d" ,strtotime("+3 months"));

    $query8=mysql_query($s);
    }
    $strings="select * from chapter_subscriptions where userId=$userid";
    $query9=mysql_query($strings);
    $display.="<table border='1' align='center'>";
    $display.="<tr><th>ChapterNumber</th><th>StartDate</th><th>EndDate</th><th colspan='2'>Action</th></tr>";
    while($result=mysql_fetch_array($query9))
    {
    $display.="<tr>";
    $display.="<td>".$result['chapter_no']."</td>";
    $display.="<td>".$result['start_date']."</td>";


    $display.="<tr><select>".$result['end_date'].
    for($i=0;$i<5;$i++)
    {
    $display.="<td><option value=echo $end_date1;>echo $end_date1;</option></td>";
    $display.="<td><option value=echo $end_date2;>echo $end_date2;</option></td>";
    $display.="<td><option value=echo $end_date3;>echo $end_date3;</option></td>";
    $display.="<td><option value=echo $end_date4;>echo $end_date4;</option></td>";
    $display.="<td><option value=echo $end_date5;>echo $end_date5;</option></td>";

    }
    $display.="</select></tr>"
    $display.="<td><a id='colour' class='tooltip' title='Edit' href='chapter_subscription_update.php?user_Id=".$result['userId']."'><img id='image' src='./images/small.gif'/></a></td>";
    $display.="<td><a id='colour' class='tooltip' data-toggle='tooltip' title='Delete' href='chapter_subscription_delete.php?user_Id=".$result['userId']." '><img id='image' src='./images/trash.png'/></a></td>";

    $display.="</tr>";
    }
    $display.="</table>";
    ?>

Answer 1

了解如何调试代码！检查How to get useful error messages in PHP?以了解如何启用详细错误。我还建议您检查this handy guide是否存在常见错误。并使用IDE检查常见错误，或使用在线code validator。 Stack Overflow不是获取调试帮助的地方，请查看What topics can I ask about here?以获取有关您可以在此处询问的内容的更多信息。

1）你有一行没有分号（导致错误的for循环之前）：

$display.="<tr><select>".$result['end_date'].

应该是这样的：

$display.="<tr><select>".$result['end_date'];

2）你有一个永不关闭的while循环（在你的脚本中的某个地方缺少}）：

while($result=mysql_fetch_array($query2)) {

3）和......

$display.="</select></tr>"

应该是

$display.="</select></tr>";

Drop down在php中不起作用

1 个答案: