首先，我想对我要粘贴的代码数量进行评估，我不想再解决它的问题，而是给我一些错误
我有一个名为contacts的表，并希望通过表单更新表。
我不确定它的表单是否为删除用户的代码是否正常工作
我刚刚开始学习这个（几天前）所以代码可能很乱或者不是100％安全，因为它应该用于离线数据库，所以我会在我学习的时候改进它。
<?php include("header.php");
//include database connection
include 'db_connect.php';
$action = isset( $_POST['action'] ) ? $_POST['action'] : "";
if($action == "update"){
//write query
$query = "update contacts
set
name = '".$mysqli->real_escape_string($_POST['name'])."',
surname = '".$mysqli->real_escape_string($_POST['surname'])."',
email = '".$mysqli->real_escape_string($_POST['email'])."',
pcode = '".$mysqli->real_escape_string($_POST['pcode'])."',
website = '".$mysqli->real_escape_string($_POST['website'])."',
gender = '".$mysqli->real_escape_string($_POST['gender'])."'
mobile = '".$mysqli->real_escape_string($_POST['mobile'])."'
phone = '".$mysqli->real_escape_string($_POST['phone'])."'
county = '".$mysqli->real_escape_string($_POST['county'])."'
town = '".$mysqli->real_escape_string($_POST['town'])."'
address = '".$mysqli->real_escape_string($_POST['address'])."'
notes = '".$mysqli->real_escape_string($_POST['notes'])."'
business = '".$mysqli->real_escape_string($_POST['business'])."'
where id='".$mysqli->real_escape_string($_REQUEST['id'])."'";
if( $mysqli->query($query) ) {
echo "User was updated.";
}else{
echo "Database Error: Unable to update record.";
}
}
if($action=='delete'){ //if the user clicked ok, run our delete query
$query = "DELETE FROM users WHERE id = ".$mysqli->real_escape_string($_GET['id'])."";
if( $mysqli->query($query) ){
echo "User was deleted.";
}else{
echo "Database Error: Unable to delete record.";
}}
$query = "select id, name, pcode, website, email, surname, mobile, phone, business, gender, address, town, county, notes
from contacts
where id='".$mysqli->real_escape_string($_REQUEST['id'])."'
limit 0,1";
$result = $mysqli->query( $query );
$row = $result->fetch_assoc();
$id = $row['id'];
$name = $row['name'];
$surname = $row['surname'];
$pcode = $row['pcode'];
$email = $row['email'];
$business = $row['business'];
$phone = $row['phone'];
$mobile = $row['mobile'];
$gender = $row['gender'];
$address = $row['address'];
$county = $row['county'];
$notes = $row['notes'];
$town = $row['town'];
$website = $row['website']; ?>
<?php echo "<a href='#' onclick='delete_user( {$id} );'>Delete</a>";
?>
<body>
<div class="div-middle-big">
<!--we have our html form here where new user information will be entered-->
<a href='index.php'>Back to index</a>
</td>
</tr>
</table>
</form>
<div id="loader_cont"><img src="img/loaders/page_loader.gif"></div>
<?php include'topnav.php' ?>
<div class="container">
<div class="main_content row-fluid">
<div class="span3">
<?php include'menu.php' ?>
<!--/.well -->
</div>
<!--/span-->
<div class="span9">
<div class="row-fluid">
<div class="span12">
<ul class="breadcrumb br_styled no_space">
<li> <a href="index.html">Dashboard</a> <span class="divider">/</span> </li>
<li class="active">Profile</li>
</ul>
<div class="widget profile_cont">
<header>
<h3>Profile: <span class="profile_title"><?php echo$name; ?> <?php echo$surname; ?></span></h3>
<ul class="toggle_content">
<li class="arrow"><a href="#">Toggle Content</a></li>
</ul>
</header>
<section class="group">
<div class="info"> <img src="http://api.thumbalizr.com/?url=http://<?php echo$website; ?>&width=250" alt="Profile picture">
<h4>Profile Picture</h4>
<div class="profile_picture">
<input type="file" />
<!-- <input type="submit" /> -->
<a href="http://<?php echo$website; ?>" class="btn">visit website</a>
<!-- <a href="#" class="btn">UPLOAD</a> -->
</div>
<ul>
<li><a href="#"><i class="sweet-user"></i> Profile</a></li>
<li><a href="#"><i class="sweet-settings"></i> Settings</a></li>
<li><a href="mailto:<?php echo$email; ?>"><i class="sweet-mail"></i> Email <?php echo$name; ?></a></li>
<li><a href="widgets.html"><i class="sweet-cog-4"></i> Widgets</a></li>
<li><a href="login.html"><i class="sweet-exit"></i> Logout</a></li>
</ul>
<div class="span3">
<div class="widget">
<header>
<h3>Grid 3</h3>
<ul class="toggle_content" style="display: none;">
<li class="arrow"><a href="#">Toggle Content</a></li>
</ul>
</header>
<section class="code_align"> <code>class="span3"</code> </section>
</div>
</div>
</div>
<div class="details">
<form action='#' method='post' border='0' class="well form-horizontal">
<fieldset>
<h4 class="group"> <span>Personal details</span> </h4>
<div class="control-group">
<div class="controls"> </div>
</div>
<div class="control-group">
<label class="control-label" for="name">First name</label>
<div class="controls">
<input id="name" type="text" name="name" value="<?php echo$name; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="surname">Last name</label>
<div class="controls">
<input id="surname" type="text" name="surname" value="<?php echo$surname; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="business">Company Name</label>
<div class="controls">
<input id="business" type="text" name="business" value="<?php echo$business; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="phone">Phone number</label>
<div class="controls">
<input id="phone" type="text" name="phone" value="<?php echo$phone; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="mobile">Mobile number</label>
<div class="controls">
<input id="mobile" type="text" name="mobile" value="<?php echo$mobile; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="gender">Sex</label>
<div class="controls">
<select class="gender" style="width:210px;" tabindex="2">
<option value="<?php echo$gender; ?>"><?php echo$gender; ?></option>
<option value="female">Female</option>
<option value="male">Male</option>
</select>
</div>
</div>
<h4>Contact details</h4>
<div class="control-group">
<label class="control-label" for="email">E-mail</label>
<div class="controls">
<input id="email" type="text" name="email" value="<?php echo$email; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="website">Website</label>
<div class="controls">
<input id="website" type="text" name="website" value="<?php echo$website; ?>" data-original-title="Without the http://">
</div>
</div>
<div class="control-group">
<label class="control-label" for="address">Address</label>
<div class="controls">
<textarea id="address" rows="3" name="address" ><?php echo$address; ?></textarea>
</div>
</div>
<div class="control-group">
<label class="control-label" for="skypeid">Town</label>
<div class="controls">
<input id="town" type="text" name="town" value="<?php echo$town; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="county">County</label>
<div class="controls">
<input id="county" type="text" name="county" value="<?php echo$county; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="pcode">Post code</label>
<div class="controls">
<input id="pcode" type="text" name="pcode" value="<?php echo$pcode; ?>">
</div>
</div>
<h4>Notes about <?php echo$name; ?> <?php echo$surname; ?></h4>
<p>
<textarea id="notes" rows="5" name="notes" ><?php echo$notes; ?></textarea>
</p>
<div class="form-actions">
<!-- so that we could identify what record is to be updated -->
<input type='hidden' name='id' value='<?php echo $id ?>' />
<!-- we will set the action to edit -->
<input type='hidden' name='action' value='update' />
<input type='submit' value='Edit' />
</div>
</fieldset>
</form>
以上代码的问题在于它没有更新我的数据库而我正在
Database Error: Unable to update record
更新
我已经回到我的旧文件，现在这个工作
好的，我回到了我的基本文件....
<meta http-equiv="refresh" content="0; url=../contacts.php"> <?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = 'root';
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
die('Could not connect: ' . mysql_error());
}
$sql = "DELETE FROM contacts
WHERE created='$_GET[id]'";
mysql_select_db('pcrepairs');
$retval = mysql_query( $sql, $conn );
if(! $retval )
{
die('Could not delete data: ' . mysql_error());
}
echo "Deleted data successfully\n";
mysql_close($conn);
?>
我现在收到此错误
Could not delete data: Unknown column 'created' in 'where clause'
答案 0 :(得分：2)
您似乎在删除查询中使用了用户表。是否存在用户表？如果没有，请将其更改为联系人。请告诉我
由于
答案 1 :(得分：1)
你可以尝试在通过mysqli运行之前回显$ query值吗？获取该sql语句并尝试通过数据库手动运行它。您可能还想仔细检查数据类型。如果您尝试（例如，使用字符串值设置NUMBER / INT字段），则会出现错误。
答案 2 :(得分：1)
您忘记了SQL UPDATE语句中的逗号：
$query = "update contacts
set
name = '".$mysqli->real_escape_string($_POST['name'])."',
surname = '".$mysqli->real_escape_string($_POST['surname'])."',
email = '".$mysqli->real_escape_string($_POST['email'])."',
pcode = '".$mysqli->real_escape_string($_POST['pcode'])."',
website = '".$mysqli->real_escape_string($_POST['website'])."',
gender = '".$mysqli->real_escape_string($_POST['gender'])."',
mobile = '".$mysqli->real_escape_string($_POST['mobile'])."',
phone = '".$mysqli->real_escape_string($_POST['phone'])."',
county = '".$mysqli->real_escape_string($_POST['county'])."',
town = '".$mysqli->real_escape_string($_POST['town'])."',
address = '".$mysqli->real_escape_string($_POST['address'])."',
notes = '".$mysqli->real_escape_string($_POST['notes'])."',
business = '".$mysqli->real_escape_string($_POST['business'])."'
where id='".$mysqli->real_escape_string($_REQUEST['id'])."'";
您还需要查看HTML代码。
修改
更新语句的SQL语法是：
UPDATE my_table_name SET col1='value1', col2='value2', ... WHERE conditions
这应该适用于删除查询：
$query = "DELETE FROM users WHERE id='".$mysqli->real_escape_string($_GET['id'])."'";
如果您使用的是PHP5 +，我建议您使用PDO而不是旧的sqlite函数。 您还需要在保存到数据库之前验证数据。
答案 3 :(得分：1)
如果您要发出SQL查询，请忘记PHP，例如在命令行中，您需要使用single quotes来表示搜索字符串。
所以它想要这样：
DELETE FROM users WHERE id = '100';
当您通过PHP构造查询时，上述内容必须保持为真：
$query = "DELETE FROM users WHERE id='".$mysqli->real_escape_string($_GET['id'])."'";
如果你的代码失败了，你真的需要深入调试代码的思维方式。以较小的块接近它并以你的方式恢复。因此，例如，您可以尝试在控制台中使用硬编码的id值执行上述查询，并确认其有效。