PHP/MySQL抛出索引错误，但已列出
它朝我扔过来了 注意：未定义索引：第16行D:\xampp\htdocs\0100348514\pages\account.php中的用户名 警告：mysql\u查询要求参数1为字符串，资源在第19行的D:\xampp\htdocs\pages\account.php中给出 但在我的数据库中，我有完全相同的“用户名”，但它仍在向我抛出任何想法 那页上的代码PHP/MySQL抛出索引错误，但已列出,php,mysql,Php,Mysql,它朝我扔过来了 注意：未定义索引：第16行D:\xampp\htdocs\0100348514\pages\account.php中的用户名 警告：mysql\u查询要求参数1为字符串，资源在第19行的D:\xampp\htdocs\pages\account.php中给出 但在我的数据库中，我有完全相同的“用户名”，但它仍在向我抛出任何想法 那页上的代码 <?php $page = "My Account"; session_start(); include '../inclu
<?php
$page = "My Account";
session_start();
include '../includes/config.php';
?>
<div id="searchbar">
<form action="search.php" method="get">
<input type="text" name="search" />
<input type="submit" name="submit" class="btn btn-primary" value="Search" />
</form>
</div>
</div>
<?php
$username = $_SESSION['username'];
$sql = "SELECT * FROM login WHERE username = '$username'";
$result = mysql_query($con, $sql) or die(mysql_error($con)); //run the query
$row = mysql_fetch_array($result);
?>
<div id="wrapper">
<section id="content" class="shadow">
<div id="titlebar">
<?php
echo $page = '<h1> My ACCOUNT </h1>';
?>
</div>
<br />
<?php
//user messages
if(isset($_SESSION['error'])) //if session error is set
{
echo '<div class="error">';
echo '<p class="center">' . $_SESSION['error'] . '</p>'; //display error message
echo '</div><br />';
unset($_SESSION['error']); //unset session error
}
elseif(isset($_SESSION['success'])) //if session success is set
{
echo '<div class="success">';
echo '<p class="center">' . $_SESSION['success'] . '</p>'; //display success message
echo '</div><br />';
unset($_SESSION['success']); //unset session success
}
?>
<div id='left'>
<form id="registration" form action="accountprocessing.php" method="post">
<br />
<fieldset><h1>Update Your Details</h1><br />
<ol>
<li>
<label>Username*</label> <input type="text" name="username" required value="<?php echo $row['username'] ?>" readonly />
</li>
<?php
//generate drop-down list for state using enum data type and values from database
$tableName='member';
$colState='state';
function getEnumState($tableName, $colState)
{
global $con; //enable database connection in the function
$sql = "SHOW COLUMNS FROM $tableName WHERE field='$colState'";
//retrieve enum column
$result = mysql_query($con, $sql) or die(mysql_error($con));
//run the query
$row = mysql_fetch_array($result); //store the results in a variable named $row
$type = preg_replace('/(^enum\()/i', '', $row['Type']); //regular expression to replace the enum syntax with blank space
$enumValues = substr($type, 0, -1); //return the enum string
$enumExplode = explode(',', $enumValues); //split the enum string into individual values
return $enumExplode; //return all the enum individual values
}
$enumValues = getEnumState('member', 'state');
echo '<select name="state">';
if((is_null($row['state'])) || (empty($row['state']))) //if the state field is NULL or empty
{
echo "<option value=''>Please select</option>"; //display the 'Please select' message
}
else
{
echo "<option value=" . $row['state'] . ">" . $row['state'] .
"</option>"; //display the selected enum value
}
foreach($enumValues as $value)
{
echo '<option value="' . $removeQuotes = str_replace("'", "",
$value) . '">' . $removeQuotes = str_replace("'", "", $value) . '</option>'; //remove the quotes from the enum values
}
echo '</select><br />';
?>
</li>
<p> </p>
<li>
<label>Postcode*</label> <input type="text" name="postcode" required value="<?php echo $row['postcode'] ?>"/>
</li><br />
<li>
<label>Country*</label> <input type="text" name="country" required value="<?php echo $row['country'] ?>"/>
</li><br />
<li>
<label>Phone</label> <input type="text" name="phone" value="<?php echo $row['phone'] ?>"/>
</li><br />
<li>
<label>Mobile</label> <input type="text" name="mobile" value="<?php echo $row['mobile'] ?>" />
</li><br />
<li>
<label>Email*</label> <input type="email" name="email" required value="<?php echo $row['email'] ?>" />
</li><br />
<li><label>Gender*</label>
<?php
//generate drop-down list for gender using enum data type and values from database
$tableName='member';
$colGender='gender';
function getEnumGender($tableName, $colGender)
{
global $con; //enable database connection in the function
$sql = "SHOW COLUMNS FROM $tableName WHERE field='$colGender'";
//retrieve enum column
$result = mysql_query($con, $sql) or die(mysql_error($con));
//run the query
$row = mysql_fetch_array($result); //store the results in a variable named $row
$type = preg_replace('/(^enum\()/i', '', $row['Type']); //regular expression to replace the enum syntax with blank space
$enumValues = substr($type, 0, -1); //return the enum string
$enumExplode = explode(',', $enumValues); //split the enum string into individual values
return $enumExplode; //return all the enum individual values
}
$enumValues = getEnumGender('member', 'gender');
echo '<select name="gender">';
echo "<option value=" . $row['gender'] . ">" . $row['gender'] .
"</option>"; //display the selected enum value
foreach($enumValues as $value)
{
echo '<option value="' . $removeQuotes = str_replace("'", "",
$value) . '">' . $removeQuotes = str_replace("'", "", $value) . '</option>';
}
echo '</select>';
?>
</li>
</ol>
</fieldset>
<br />
<fieldset>
<p>Subscribe to weekly email newsletter?</p><br />
<label>Yes</label><input type="radio" name="newsletter" value="Y" <?php if($row['newsletter'] == "Y"){echo "checked";} ?>><br />
<label>No</label><input type="radio" name="newsletter" value="N" <?php if($row['newsletter'] == "N"){echo "checked";} ?>>
<input type="hidden" name="memberID" value="<?php echo $memberID; ?>">
</fieldset><br />
<p class="center"><input type="submit" name="accountupdate" value="Update Account" /></p><br />
</form>
</div>
<br />
<div id='right'>
<form id="registration" form action="accountimageprocessing.php" method="post" enctype="multipart/form-data">
<input type="hidden" name="memberID" value="<?php echo $memberID; ?>">
<br />
<fieldset><h1>Update Image</h1><br />
<?php
if((is_null($row['image'])) || (empty($row['image']))) //if the photo field is NULL or empty
{
echo "<p class='center'><img src='../images/members/member.png' width=150 height=150 alt='default photo' /></p>"; //display the default photo
}
else
{
echo "<p class='center'><img src='../images/members/" . ($row['image']) . "'" . 'width=150 height=150 alt="contact photo"' . "/></p><br />"; //display the contact photo
}
?>
<label>New Image</label> <input type="file" name="image" />
<br />
<p>Accepted files are JPG, GIF or PNG. Maximum size is 500kb.</p>
<br />
<p class='center'><input type="submit" name="imageupdate" value="Update Image" /></p>
</form>
<br />
<br />
<form action="accountpasswordprocessing.php" method="post">
<h1>Update Password</h1>
<br />
<p>Passwords must have a minimum of 8 characters.</p> <br />
<label>New Password*</label> <input type="password" name="password" pattern=".{8,}" title= "Password must be 8 characters or more" required />
<br />
<input type="hidden" name="memberID" value="<?php echo $memberID; ?>">
<br />
<p class='center'><input type="submit" name="passwordupdate" value="Update Password" /></p>
<br />
</form>
<h1>Delete My Account</h1>
<br />
<p>We're sorry to hear you'd like to delete your account. By clicking the button below you will permanently delete your account.</p>
<br />
<form action="accountdelete.php" method="post">
<p class='center'><input type="submit" value="Delete My Account" onclick="return confirm('Are you sure you wish to permanently delete your account?');" ></p>
<input type="hidden" name="memberID" value="<?php echo $memberID; ?>"><br />
</fieldset>
</form>
</div>
</section> <!-- end #content -->
<div id="footernav" class id="shadow">
<?php
require "../inc/footer.php";
?>
</div>
</div>
mysql_query($sql, $con);
所有这些代码都不是必需的。我们只需要错误行和前面的几行&中代码行后面的一两行question@DarylGill我知道，但为了安全起见。$result=mysql\u query$con，$sql-in-mysql\u连接排在最后。这是第二个错误的修复程序。添加此$_会话['username']=$_POST['username']；修复第一个问题。@Fred ii-我应该把我的问题重新表述一下，我更感兴趣的是用户能够更改他们的电子邮件和密码。好的。注意：第16行的D:\xampp\htdocs\0100348514\pages\account.php中的未定义索引：username如何？该错误是不言自明的。OP应检查全局$\u会话数组中是否有键为“username”的条目。