大家好
我有一个带有指南的数据库，可以在管理模式下编辑。我刚刚重新创建了输入区域并且一切都很好，除非以管理员身份登录我无法更新指南，它只是创建一个新指南而不是简单地更新。
请对我温柔，因为我是编码世界的初学者，+我会喜欢这个新鲜的眼睛:)非常感谢你
我的信息中心代码
<?php include("header.php"); ?>
<?php
if(!isset($_SESSION['isLogin']) && $_SESSION['isLogin'] != "YES"){
die("<script> window.location = 'login.php' </script>");
}
$error=false;
$success=false;
if(isset($_GET) && !empty($_GET)) {
$id = base64_decode($_GET['id']);
$user_id = $_SESSION['userInfo']['id'];
$selectSql = "SELECT * FROM guides WHERE 1 = 1 AND user_id = " . $user_id . " AND id = " . $id;
$result = $conn->query($selectSql);
$id = 0;
$title = $step2 = $step3 = $step4 = $step5 = $step6 = $step7 = $step8 = $step9 = '';
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
$id = $row['id'];
$title = $row['title'];
$step2 = $row['step2'];
$step3 = $row['step3'];
$step4 = $row['step4'];
$step5 = $row['step5'];
$step6 = $row['step6'];
$step7 = $row['step7'];
$step8 = $row['step8'];
$step9 = $row['step9'];
}
}
}
if(isset($_POST) && !empty($_POST)){
$user_id = $_SESSION['userInfo']['id'];
if($_POST['id']){
$sqlInsert = 'UPDATE guides SET title = "'.htmlentities($_POST["title"]).'", step2 = "'.htmlentities($_POST["step2"]).'", step3 = "'.htmlentities($_POST["step3"]).'", step4 = "'.htmlentities($_POST["step4"]).'", step5 = "'.htmlentities($_POST["step5"]).'", step6 = "'.htmlentities($_POST["step6"]).'", step7 = "'.htmlentities($_POST["step7"]).'", step8 = "'.htmlentities($_POST["step8"]).'", step9 = "'.htmlentities($_POST["step9"]).'" WHERE id = ' . $_POST['id'] . ' AND user_id = ' . $_SESSION['userInfo']['id'];
}else{
$sqlInsert = 'INSERT INTO guides(user_id, title, step2, step3, step4, step5, step6, step7, step8, step9)VALUES ("' .$user_id. '", "'.htmlentities($_POST["title"]).'", "'.htmlentities($_POST["step2"]).'", "'.htmlentities($_POST["step3"]).'", "'.htmlentities($_POST["step4"]).'", "'.htmlentities($_POST["step5"]).'", "'.htmlentities($_POST["step6"]).'", "'.htmlentities($_POST["step7"]).'", "'.htmlentities($_POST["step8"]).'", "'.htmlentities($_POST["step9"]).'")';
}
if ($conn->query($sqlInsert) === TRUE) {
if($_POST['id']){
$success = "Your guide has been updated successfully!";
}else{
$success = "Your guide has been added successfully!";
}
$_SESSION['success'] = $success;
header("Location: dashboard.php");
}else{
$error[] = "Error Message: ".$conn->error;
}
}
?>
<!DOCTYPE HTML>
<html>
<head>
<title>Guideory - share your knowledge</title>
<link href="css/style.css" rel="stylesheet" type="text/css" media="all"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-
scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="keywords" content="Guideory - share your knowledge" />
<!--web-fonts-->
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet">
<link rel="stylesheet" href="css/style.css">
<!--web-fonts-->
</head>
<body>
<div class="header">
</div>
<!---header--->
<!---main--->
<div class="main">
<div class="main-section">
<div class="login-form">
<h2>Share a piece of your knowledge</h2>
<br>
<h4>You can create up to 8 steps, not including the title.
Atleast one step is required. When writing your guide, remember that other
people have to be able to read it, so be as specific as possible.</h4>
<form role="form" method="post">
<div id="step-1">
<ul>
<li class="text-info" id="title">Title:</li>
<li><input type="text" value="<?php echo $title;
?>" name="title" id="title" placeholder="Enter the title for your guide here"
required></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info" id="step2">Step 1:</li>
<li><textarea name="step2" id="step2"
placeholder="Enter the description for step 1 here" required><?php echo
$step2; ?></textarea></li>
<div class="clear"></div>
</ul>
<br>
<ul>
<li class="text-info">Step 2:</li>
<li><textarea name="step3" placeholder="Enter the
description for step 2 here"><?php echo $step3; ?></textarea></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info">Step 3:</li>
<li><textarea name="step4" placeholder="Enter the
description for step 3 here"><?php echo $step4; ?></textarea></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info">Step 4:</li>
<li><textarea name="step5" placeholder="Enter the
description for step 4 here"><?php echo $step5; ?></textarea></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info">Step 5:</li>
<li><textarea name="step6" placeholder="Enter the
description for step 5 here"><?php echo $step6; ?></textarea></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info">Step 6:</li>
<li><textarea name="step7" placeholder="Enter the
description for step 6 here"><?php echo $step7; ?></textarea></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info">Step 7:</li>
<li><textarea name="step8" placeholder="Enter the
description for step 7 here"><?php echo $step8; ?></textarea></li>
<div class="clear"></div>
</ul>
<ul>
<li class="text-info">Step 8:</li>
<li><textarea name="step9" placeholder="Enter the
description for step 8 here"><?php echo $step9; ?></textarea></li>
<div class="clear"></div>
</ul>
<input type="submit" value="Create guide">
</form>
</div>
</div>
</div>
</body>
</html>
答案 0 :(得分：2)
没有名称为id的输入，因此$_POST['id']不存在，这就是为什么有插入而不是更新。
还有一些额外的提示
!isset($_SESSION['isLogin']) && $_SESSION['isLogin'] != "YES"
你可能想要isset($_SESSION['isLogin'])，因为当没有设置变量时，它永远不会是YES
isset($_GET) && !empty($_GET)
您可以在此处删除isset，仅使用empty。
while ($row = $result->fetch_assoc()) {
只有最后一行存储在这些变量中，因为你要覆盖它们。