Question

我尝试编辑/更新我的数据表单但是当我点击＆＃34;编辑＆＃34;按钮它没有改变任何东西，我不知道究竟发生了什么，输出说

致命错误：未捕获错误：在null上调用成员函数query（）在C：\ xampp \ htdocs \ Admin \ requestform5.php：24堆栈跟踪：＃0 {main} 在第24行的C：\ xampp \ htdocs \ Admin \ requestform5.php中抛出

编码

<?php 
include "errorReporting.php";
include "conn.php";
$conn = connect();
$db = connectdb();

$wardID = $_REQUEST["wardID"];
$RequestName = $_REQUEST["RequestName"];
$Department =$_REQUEST["Department"];
$Position =$_REQUEST["Position"];
$Date=$_REQUEST["Date"];

$TypeOfRequest=$_REQUEST["TypeOfRequest"];
$PleaseSpecify=$_REQUEST["PleaseSpecify"];
$DateRequire= $_REQUEST["DateRequire"];
$DateReturn= $_REQUEST["DateReturn"];

mysqli_select_db ($conn,"admin") or die ($conn->error ."\n");
$query = "select*from requestform";
$result= $conn->query($query) or die ($conn->error."\n");
$row_result =mysqli_fetch_assoc($result);

mysqli_select_db ($conn,"admin") or die ($conn->error."\n");
$mysqli->query( "UPDATE requestform SET RequestName='$RequestName',Department='$Department',Position='$Position',Date='$Date',TypeOfRequest='$TypeOfRequest',PleaseSpecify='$PleaseSpecify',DateRequire='$DateRequire',DateReturn='$DateReturn' where wardID='$wardID'");
$mysqli->affected_rows or die ($conn->error()."\n");


header("Location:requestform3.php");?>

Answer 1

您的查询是主要问题

$query = "select*from requestform";

更改为

mysqli_select_db ($conn,"admin") or die ($conn->error ."\n");
$query = "select * from requestform";
$result= $conn->query($query) or die ($conn->error."\n");
$row_result =mysqli_fetch_assoc($result);

$conn->query( "UPDATE requestform SET RequestName='$RequestName',Department='$Department',Position='$Position',Date='$Date',TypeOfRequest='$TypeOfRequest',PleaseSpecify='$PleaseSpecify',DateRequire='$DateRequire',DateReturn='$DateReturn' where wardID='$wardID'");
$conn->affected_rows or die ($conn->error()."\n");

Answer 2

问题在于第24行

$ mysqli-＆gt;查询（＆＃34; UPDATE requestform SET RequestName =＆＃39; $ RequestName＆＃39;，Department =＆＃39; $ Department＆＃39;，Position = ＆＃39; $位置＆＃39;，日期=＆＃39; $日期＆＃39;，TypeOfRequest =＆＃39; $ TypeOfRequest＆＃39;，PleaseSpecify =＆＃39; $ PleaseSpecify＆＃39;，DateRequire =＆＃ 39; $ DateRequire＆＃39;，DateReturn =＆＃39; $ DateReturn＆＃39; where wardID =＆＃39; $ wardID＆＃39;＆＃34;）; $ mysqli-＆gt; affected_rows 或死亡（$ conn-＆gt;错误（）。＆＃34; \ n＆＃34;）;

这个$ mysqli来自哪里？这是一个对象吗？我无法在任何地方看到这个对象。你有$ conn对象。

只需将$ mysqli-＆gt;查询更改为$ conn-＆gt;查询

我无法编辑我的用户数据

2 个答案: