我正在使用消息传递系统并且我正在使用PHP和MySQL，一切正常，除了read_pm.php中的回复功能，我可以发送，读取和接收消息但是当我阅读消息，我尝试回复，我收到错误＆＃34;发送消息时出错。＆＃34;当它无法进入数据库时会发生这种情况所以我想它应该是我的查询但是无法解决它，我检查了代码的每一部分并且找不到错误，任何想法？
数据库中有2个表，一个用户和一个pm用于消息 这是read_pm.php：
<?php
//We check if the user is logged
if(isset($_SESSION['id']))
{
//We check if the ID of the discussion is defined
if(isset($_GET['id']))
{
$id = intval($_GET['id']);
//We get the title and the narators of the discussion
$req1 = mysqli_query($link,'select title, user1, user2 from pm where id="'.$id.'" and id2="1"');
$dn1 = mysqli_fetch_array($req1);
//We check if the discussion exists
if(mysqli_num_rows($req1)==1)
{
//We check if the user have the right to read this discussion
if($dn1['user1']==$_SESSION['id'] or $dn1['user2']==$_SESSION['id'])
{
//The discussion will be placed in read messages
if($dn1['user1']==$_SESSION['id'])
{
mysqli_query($link,'update pm set user1read="yes" where id="'.$id.'" and id2="1"');
$user_partic = 2;
}
else
{
mysqli_query($link,'update pm set user2read="yes" where id="'.$id.'" and id2="1"');
$user_partic = 1;
}
//We get the list of the messages
$req2 = mysqli_query($link,'select pm.timestamp, pm.message, users.id as userid, users.email,users.firstname from pm, users where pm.id="'.$id.'" and users.id=pm.user1 order by pm.id2');
//We check if the form has been sent
if(isset($_POST['message']) and $_POST['message']!='')
{
$message = $_POST['message'];
//We remove slashes depending on the configuration
if(get_magic_quotes_gpc())
{
$message = stripslashes($message);
}
//We protect the variables
$message = mysqli_real_escape_string(nl2br(htmlentities($message, ENT_QUOTES, 'UTF-8')));
//We send the message and we change the status of the discussion to unread for the recipient
if(mysqli_query($link,'insert into pm (id, id2, title, user1, user2, message, timestamp, user1read, user2read)values("'.$id.'", "'.(intval(mysqli_num_rows($req2))+1).'", "", "'.$_SESSION['id'].'", "", "'.$message.'", "'.time().'", "", "")') and mysqli_query($link,'update pm set user'.$user_partic.'read="yes" where id="'.$id.'" and id2="1"'))
{
?>
<div class="message">Your message has successfully been sent.<br />
<a href="read_pm.php?id=<?php echo $id; ?>">Go to the discussion</a></div>
<?php
}
else
{
?>
<div class="message">An error occurred while sending the message.<br />
<a href="read_pm.php?id=<?php echo $id; ?>">Go to the discussion</a></div>
<?php
}
}
else
{
//We display the messages
?>
<div class="content">
<h3><?php echo $dn1['title']; ?></h3>
<table class="messages_table">
<tr>
<th class="author">User</th>
<th>Message</th>
</tr>
<?php
while($dn2 = mysqli_fetch_array($req2))
{
?>
<tr>
<td class="author center"><?php
if($dn2['avatar']!='')
{
echo '<img src="'.htmlentities($dn2['avatar']).'" alt="Image Perso" style="max-width:100px;max-height:100px;" />';
}
?><br /><a href="profile.php?id=<?php echo $dn2['userid']; ?>"><?php echo $dn2['firstname']; ?></a></td>
<td class="left"><div class="date">Sent: <?php echo date('m/d/Y H:i:s' ,$dn2['timestamp']); ?></div>
<?php echo $dn2['message']; ?></td>
</tr>
<?php
}
//We display the reply form
?>
</table><br />
<h3>Reply</h3>
<div class="center">
<form class="marginTop" action="read_pm.php?id=<?php echo $id; ?>" method="post">
<label for="message" class="center">Message</label><br />
<textarea class="form-control marginTop" cols="40" rows="5" name="message" id="message"></textarea><br />
<input class="btn btn-success" type="submit" value="Send" />
</form>
</div>
</div>
<?php
}
}
else
{
echo '<div class="message">You dont have the rights to access this page.</div>';
}
}
else
{
echo '<div class="message">This discussion does not exists.</div>';
}
}
else
{
echo '<div class="message">The discussion ID is not defined.</div>';
}
}
else
{
echo '<div class="message">You must be logged to access this page.</div>';
}
?>
这是new_pm.php，它发送一条新消息并正常工作：
<?php
//We check if the user is logged
if(isset($_SESSION['id']))
{
$form = true;
$otitle = '';
$orecip = '';
$omessage = '';
//We check if the form has been sent
if(isset($_POST['title'], $_POST['recip'], $_POST['message']))
{
$otitle = $_POST['title'];
$orecip = $_POST['recip'];
$omessage = $_POST['message'];
//We remove slashes depending on the configuration
if(get_magic_quotes_gpc())
{
//$otitle = stripslashes($otitle);
//$orecip = stripslashes($orecip);
//$omessage = stripslashes($omessage);
}
//We check if all the fields are filled
if($_POST['title']!='' and $_POST['recip']!='' and $_POST['message']!='')
{
//We protect the variables
// $title = mysqli_real_escape_string($otitle);
//$recip = mysqli_real_escape_string($orecip);
// $message = mysqli_real_escape_string(nl2br(htmlentities($omessage, ENT_QUOTES, 'UTF-8')));
//We check if the recipient exists
$dn1 = mysqli_fetch_array(mysqli_query($link,'select count(id) as recip, id as recipid , (select count(*) from pm) as npm from users where email ="'.$orecip.'"'));
if($dn1['recip']==1)
{
//We check if the recipient is not the actual user
if($dn1['recipid']!=$_SESSION['id'])
{
$id = $dn1['npm']+1;
//We send the message
if(mysqli_query($link,'insert into pm (id, id2, title, user1, user2, message, timestamp, user1read, user2read)values("'.$id.'", "1", "'.$otitle.'", "'.$_SESSION['id'].'", "'.$dn1['recipid'].'", "'.$omessage.'", "'.time().'", "yes", "no")'))
{
?>
<div class="message">The message has successfully been sent.<br />
<a href="list_pm.php">List of my Personal messages</a></div>
<?php
$form = false;
}
else
{
//Otherwise, we say that an error occured
$error = 'An error occurred while sending the message';
}
}
else
{
//Otherwise, we say the user cannot send a message to himself
$error = 'You cannot send a message to yourself.';
}
}
else
{
//Otherwise, we say the recipient does not exists
$error = 'The recipient does not exists.';
}
}
else
{
//Otherwise, we say a field is empty
$error = 'A field is empty. Please fill of the fields.';
}
}
elseif(isset($_GET['recip']))
{
//We get the username for the recipient if available
$orecip = $_GET['recip'];
}
if($form)
{
//We display a message if necessary
if(isset($error))
{
echo '<div class="message">'.$error.'</div>';
}
//We display the form
?>
<div class="container contentContainer" id="topContainer">
<div class="row">
<div class="col-md-12 " id="topRow">
<form class="marginTop" action="new_pm.php" method="post">
<div class="form-group required">
<label for="title"> Subject* </label>
<input class="form-control marginBottom" type="text" value="<?php echo htmlentities($otitle, ENT_QUOTES, 'UTF-8'); ?>" id="title" name="title" /><br />
</div>
<div class="form-group required">
<label for="recip">Recipient<span class="small">(UserEmail)*</span></label>
<input class="form-control marginBottom" type="text" value="<?php echo htmlentities($orecip, ENT_QUOTES, 'UTF-8'); ?>" id="recip" name="recip" /><br />
</div>
<div class="form-group required">
<label for="message">Message*</label>
<textarea class="form-control marginBottom" cols="40" rows="5" id="message" name="message"><?php echo htmlentities($omessage, ENT_QUOTES, 'UTF-8'); ?></textarea><br />
<input type="submit" value="Send" class="btn btn-success"/>
</div>
</form>
</div>
</div>
</div>
<?php
}
}
else
{
echo '<div class="message">You must be logged to access this page.</div>';
}
?>
答案 0 :(得分：0)
当您通过$user_partic发送时，我认为null为POST。
if(mysqli_query($link,'insert into pm (id, id2, title, user1, user2, message, timestamp, user1read, user2read)values("'.$id.'", "'.(intval(mysqli_num_rows($req2))+1).'", "", "'.$_SESSION['id'].'", "", "'.$message.'", "'.time().'", "", "")') and mysqli_query($link,'update pm set user'.$user_partic.'read="yes" where id="'.$id.'" and id2="1"')){}
可能导致查询：update pm set userread="yes" where id="id_value" and id2="1"
另外，检查HTTP请求是POST还是GET是重叠的？，你也可以检查一下